Embed PowerShell terminal and polish file panels

Refs #8

AGENTS.md

@@ -33,3 +33,9 @@ Wiki: https://gitea.hrynco.com/hrynco/hrynco-kswitcher/wiki
 
 Updating only the release notes or changing only the Wiki version number does
 not satisfy this rule; the current functionality must also be reviewed.
+
+## KSwitcher Files UI
+
+Before changing the file manager UI, read [FILES-UI.md](FILES-UI.md).
+Reuse the shared dialog rendering and layout helpers. Update the document
+when an agreed UI requirement changes.

CMakeLists.txt

@@ -1,10 +1,26 @@
 cmake_minimum_required(VERSION 3.24)
-project(KSwitcher VERSION 0.6.73 LANGUAGES CXX RC)
+project(KSwitcher VERSION 0.6.77 LANGUAGES CXX RC)
 if(NOT WIN32)
   message(FATAL_ERROR "KSwitcher uses native Windows APIs")
 endif()
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
+add_executable(KSwitcherFiles WIN32 src/files_main.cpp resources/files.rc)
+set_target_properties(KSwitcherFiles PROPERTIES OUTPUT_NAME "KSwitcher.Files")
+target_compile_definitions(KSwitcherFiles PRIVATE UNICODE _UNICODE NOMINMAX _WIN32_WINNT=0x0A00)
+find_program(KSWITCHER_POWERSHELL NAMES pwsh powershell REQUIRED)
+add_custom_target(KSwitcherTerminalAssets
+  COMMAND "${KSWITCHER_POWERSHELL}" -NoProfile -File "${CMAKE_CURRENT_SOURCE_DIR}/tools/stage-files-terminal.ps1"
+          -Destination "$<TARGET_FILE_DIR:KSwitcherFiles>"
+  VERBATIM)
+add_dependencies(KSwitcherFiles KSwitcherTerminalAssets)
+target_include_directories(KSwitcherFiles PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/build/terminal-deps/sdk/build/native/include")
+target_link_libraries(KSwitcherFiles PRIVATE user32 gdi32 comctl32 shell32 comdlg32 advapi32 ole32 uuid)
+if(MSVC)
+  target_compile_options(KSwitcherFiles PRIVATE /utf-8)
+else()
+  target_link_options(KSwitcherFiles PRIVATE -municode -static)
+endif()
 add_executable(StayHere WIN32 utilities/StayHere/main.cpp)
 add_executable(StayHereTest WIN32 utilities/StayHere/main.cpp)
 target_compile_definitions(StayHereTest PRIVATE STAYHERE_TEST_INSTANCE)
@@ -173,7 +189,7 @@ add_test(NAME screenshot-ui-regressions COMMAND KSwitcherScreenshotUITests)
 add_test(NAME screenshot-save-regressions COMMAND KSwitcherScreenshotUITests --save-only)
 add_test(NAME updater-regressions COMMAND powershell.exe -NoProfile -ExecutionPolicy Bypass -File "${CMAKE_CURRENT_SOURCE_DIR}/tests/update.ps1" -Executable "$<TARGET_FILE:KSwitcher>")
 set_tests_properties(native-regressions PROPERTIES WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}")
-install(TARGETS KSwitcher KSwitcherConfig KSwitcherScreenshot RUNTIME DESTINATION .)
+install(TARGETS KSwitcher KSwitcherConfig KSwitcherScreenshot KSwitcherFiles RUNTIME DESTINATION .)
 install(FILES LICENSE vendor/json-LICENSE.txt DESTINATION .)
 
 add_custom_command(TARGET KSwitcher POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_directory "${CMAKE_CURRENT_SOURCE_DIR}/dictionaries" "$<TARGET_FILE_DIR:KSwitcher>/dictionaries")

FILES-UI.md

@@ -0,0 +1,56 @@
+# Оформлення KSwitcher Files
+
+Far Manager є зразком для оформлення файлового менеджера. Основне вікно використовує системний заголовок Windows. Панелі, меню й діалоги операцій використовують моноширинний шрифт менеджера та оформлення в стилі Far.
+
+## Панелі
+
+- Після F5 або F6 успішно оброблені елементи коротко підсвічуються в панелі, що показує папку призначення. Підсвітка тексту відрізняється від курсора й не переносить фокус.
+
+- У широкому режимі ширина під вирівняні розширення залежить від найдовшого розширення в поточній панелі. За вузької панелі залишай місце для імені та колонки Size.
+
+- Бірюзовий курсор поточного рядка видно лише в активній панелі. Кожна панель зберігає свою позицію курсора.
+
+- Поточний шлях відображається по центру верхньої подвійної лінії панелі. Лінію видно з обох боків напису. Бірюзове тло активної панелі охоплює лише напис шляху з невеликими відступами. Довгий шлях скорочується в межах панелі.
+
+## Спільні елементи діалогів
+
+- Enter активує кнопку у фокусі. Для кнопок із власним малюванням використовуй спільний обробник `dialogButtonEnter`. У підтвердженні скасування початковий фокус стоїть на No.
+
+- При перенесенні вікна між моніторами з різним DPI оновлюй шрифт, висоту рядків панелей і компонування відкритого прогресу копіювання. Перевір перенесення під час активного копіювання.
+- Для власних діалогів використовуй подвійну рамку з одним заголовком у верхній лінії. Звичайний діалог має сіре тло, попередження — темно-червоне тло та білий текст.
+- У ресурсі чи виклику задавай назву кнопки й клавішу доступу. Спільна функція `paintDialogButton` центрує текст, підсвічує фокус і додає фігурні дужки для дії за замовчуванням та квадратні для решти кнопок.
+- Нижні секції з кнопками у Copy, Warning і вікні прогресу мають однакову висоту, прив’язану до висоти рядка шрифту. Використовуй `layoutDialogButtons` для такої секції та `centerDialogRow` для інших рядків між роздільниками. Межі секції визначають положення рядка.
+- Поля вводу й випадаючі списки використовують бірюзове тло палітри менеджера. Текст і стрілку вирівнюй вертикально по центру. Прапорці в діалогах операцій використовують позначки `[ ]` та `[x]` і видимий клавіатурний фокус.
+- Повторно використовуй спільне оформлення. Текст, дії та стан операції передавай із коду конкретної операції. Наприклад, Warning повертає відповідь і стан прапорця, а копіювання вирішує, чи застосувати відповідь до наступних конфліктів.
+
+## Діалог Copy
+
+- Вирівнюй підпис Existing files по вертикальному центру списку. Ширше поле списку починається ближче до підпису, а його правий край збігається з правим краєм поля імені.
+- Зберігай однакові проміжки від верхнього роздільника до поля імені й до списку. Підпис, поля та прапорець мають читатися повністю.
+- Відступ після прапорця до нижнього роздільника дорівнює відступу від верхнього роздільника до списку.
+- Кнопки Copy та Cancel стоять по центру компактної нижньої секції. Висота кнопок має вміщати весь текст поточного шрифту.
+
+## Вікно прогресу копіювання
+
+- F6 використовує спільне оформлення діалогів Copy і прогресу. Заголовок підтвердження — Rename/Move, кнопка за замовчуванням — Rename, заголовок прогресу — Move.
+- Поле призначення F6 початково містить шлях іншої панелі. Для одного елемента просте ім’я задає перейменування в поточній папці. Для кількох елементів діалог показує їх кількість і приймає один шлях до папки.
+
+- Секції поточного файла й загального прогресу мають однаковий вертикальний відступ від вмісту до верхньої та нижньої ліній. Cancel стоїть по центру спільної нижньої секції.
+- Обидві шкали займають усю ширину вмісту. Відсотки показуються по центру шкали, а її висота враховує поточний шрифт.
+
+## Попередження про конфлікт
+
+- Після розрахунку остаточної висоти центр Warning збігається з центром вікна прогресу.
+- Remember choice стоїть по вертикальному центру власної секції. Кнопки Overwrite, Skip і Cancel стоять по центру нижньої секції.
+- Tab проходить Remember choice, Overwrite, Skip і Cancel. Стрілки вліво та вправо циклічно перемикають три кнопки в порядку їх розташування.
+- Стрілки вгору й вниз переходять між сусідніми секціями з інтерактивними елементами. У Warning стрілка вгору з ряду кнопок переводить фокус на Remember choice, а вниз із прапорця — на Overwrite.
+
+## Видалення
+
+- F8 показує сіре підтвердження з дією Move. Shift+Delete і підтвердження непорожньої папки мають темно-червоне тло. Вікно прогресу видалення має сіре тло, як у Copy.
+- F8 переміщує підтверджені елементи в кошик Windows. Shift+Delete видаляє підтверджене дерево від вкладених елементів до батьківської папки. Прогрес і підсумок окремо показують успішні, пропущені й невдалі дії.
+- Cancel і Esc у вікні прогресу відкривають спільне червоне підтвердження скасування. Yes зупиняє операцію, а No або Esc у підтвердженні повертає до прогресу. Початковий фокус стоїть на No.
+
+## Перевірка змін
+
+Відкрий Copy і Warning в одній збірці та порівняй висоту нижніх секцій, центрування, повноту підписів і видимість фокуса. Перевір Tab, стрілки й Esc. Після узгодження нового правила онови відповідний розділ цього документа.

LAN-PREVIEW.md

@@ -5,8 +5,34 @@ code on both computers, and shares mouse and keyboard through a screen edge.
 The module runs inside the resident process. Multiple paired computers can be
 arranged on a monitor grid. Mouse and keyboard follow neighboring cells, including
 A → B → C, without relaying input through B. New text and images are also shared
-with all online paired computers: history and the active clipboard. File transfer
-is not implemented by clipboard synchronization.
+with all online paired computers: history and the active clipboard.
+
+## Files and diagnostic logs
+
+In **Settings → Computers → Manage computers…**, select an online paired
+computer and choose **Send file…**. Both computers need a build with file transfer.
+Files up to 16 MiB travel over encrypted LAN. On the destination, open
+**Incoming files…** to save or discard each file. The save dialog suggests the
+original filename. KSwitcher shows a Windows notification when a file is ready
+to save, and its tray tooltip shows the pending count. Pending files are held
+in memory until saved, discarded, or KSwitcher closes.
+
+To retrieve the current or rotated diagnostic log, enable **Allow paired
+computers to download diagnostic logs** on the computer that owns the logs.
+This setting defaults to off. On the requesting PC, select that computer and
+choose **Download log…** or **Previous log…**. Diagnostic logs may contain
+text copied from applications.
+
+### MCP
+
+In **Settings → MCP**, choose **Copy configuration** and paste the block into
+Codex's `~/.codex/config.toml`. It starts the MCP server over stdio with the
+absolute path to `KSwitcher.Config.exe` and the `--mcp` argument.
+`list_log_computers` returns paired computer IDs and availability.
+`read_diagnostic_log` reads the latest 100 lines by default (1–500 with
+`lines`). Use `offset` to skip newer lines and page backward. Set `previous` to read the rotated log. Omit `peer` for the
+local log or pass a paired computer ID for a remote log. Remote reads need
+the local resident process running and log downloads enabled on the remote PC.
 
 ## Set up multiple computers
 

README.md

@@ -609,9 +609,9 @@ Windows exposes them; selection offsets are available for native EDIT controls a
 marked unavailable for other editors. Input interruptions identify keyboard, mouse, settings
 or layout-refresh events during an operation. Failed selection verification includes the expected
 selection and actual copied text in the operation details, without implying that a paste occurred.
-Only problem operations write a structured summary to `kswitcher.log`, with their preceding
+Problem operations write a structured summary to `kswitcher.log`, with their preceding
 context. Successful operations stay in that bounded memory buffer and are included only when
-a subsequent problem flushes it; they do not create separate rows. Flushed context is discarded. Ordinary application
+a subsequent problem flushes it. Verified pastes that take at least two seconds also write a summary without the copied text. Flushed context is discarded. Ordinary application
 errors are also logged when logging is enabled. This works in normal Release builds.
 Incident context contains tracked physical input, the expected word, copied text, conversion result,
 and layout IDs, correlated by request ID even when verification fails. Text fields use quoted,
@@ -833,13 +833,13 @@ default and require the main **Automatic correction (experimental)** checkbox to
 
 - **Use custom replacements**: enter one `typo=correction` pair per line, for example
   `првиіт=привіт` or `helo=hello`. Entries are normalized to lowercase; duplicate source words
-  are rejected. The typo must contain 1–32 letters. The correction may contain several words
+  are rejected. The typo must be one word of 1–32 characters with at least one letter. It can contain digits and internal apostrophes. The correction may contain several words
   separated by single spaces, for example `мамамила=мама мила`, up to 32 characters including
   spaces. Corrections also allow apostrophes (`'`, `’`, `ʼ`) between letters, for example
   `ревю=рев'ю`. Both sides must use the same supported language, without other punctuation; leading,
   trailing and repeated spaces are not allowed. Explicit pairs take priority over dictionary recognition, including
   already valid words, and do not require dictionary membership or satisfy the frequency limit.
-  Update every synchronizing PC to v0.6.60 or newer before sharing apostrophe pairs; older clients reject them.
+  Update every synchronizing PC to v0.6.75 before sharing pairs with digits or apostrophes in the typo.
 - **Correct spelling typos using dictionaries**: checks unknown words in the current language
   after no layout correction is found. It accepts exactly one dictionary candidate reachable
   by inserting, deleting or replacing one letter, or swapping two adjacent letters. Both input

Release/README.md

@@ -1,5 +1,54 @@
 # Latest Windows release
 
+## v0.6.77 — 2026-11-13
+
+The screenshot editor remembers the local pencil smoothing default across
+restarts. Adjust the slider with no pencil stroke selected, or use **Apply to
+all**, to save the value for new strokes. Adjusting a selected stroke changes
+only that stroke.
+
+**Українською.** Редактор скріншотів зберігає типове згладжування олівця на
+цьому ПК та відновлює його після перезапуску. Змініть повзунок без виділеного
+штриха олівця або натисніть **Apply to all**, щоб запам’ятати значення для
+нових штрихів. Зміна виділеного штриха впливає лише на нього.
+
+## v0.6.76 — 2026-11-13
+
+Incoming LAN files suggest their original filename when saved. KSwitcher shows
+a Windows tray notification when a file is ready to save, and the tray tooltip
+shows the pending count.
+
+**Українською.** Під час збереження вхідного LAN-файлу пропонується його
+оригінальна назва. KSwitcher показує сповіщення в треї, коли файл готовий
+до збереження. Підказка іконки показує кількість файлів у черзі.
+
+## v0.6.75 — 2026-11-13
+
+Conversion cancels earlier when input changes and skips restoring an untouched
+clipboard. Diagnostic records identify the active conversion behind `busy`,
+separate clipboard and paste verification timings, and retain a text-free
+summary of verified pastes that take at least two seconds. MCP log reads
+support `offset` to page backward.
+
+**Українською.** Конвертація раніше скасовується після зміни вводу й пропускає
+відновлення буфера, якщо його не змінювала. Діагностика показує активну спробу
+для `busy`, окремий час роботи з буфером і перевірки вставки, а також зберігає
+підсумок перевірених вставок від двох секунд без скопійованого тексту. У MCP
+параметр `offset` дає змогу читати старіші рядки.
+
+Explicit replacements now accept digits and internal apostrophes in the source word, for example нав1язав=навʼязав. Invalid entries identify the offending pair.
+
+**Українською.** Явні заміни підтримують цифри й внутрішні апострофи у вихідному слові, наприклад нав1язав=навʼязав. Повідомлення про помилку показує проблемну пару.
+
+## v0.6.74 — 2026-11-13
+
+- Send files up to 16 MiB to a selected paired PC over encrypted LAN. Save or discard them from **Incoming files**.
+- Download current and previous diagnostic logs from paired PCs that explicitly allow remote log downloads.
+- Copy the Codex configuration from **Settings → MCP**. The MCP server lists paired PCs and reads local or remote diagnostic logs.
+- Search contacts in the **Languages for a chat** table. **Copy selected** in Diagnostics now uses normal clipboard synchronization.
+
+**Українською.** Передавайте файли до 16 МіБ вибраному спареному ПК зашифрованою локальною мережею. У **Incoming files** можна зберегти або відхилити файл. Поточний і попередній журнали доступні для завантаження після ввімкнення відповідного дозволу на віддаленому ПК. У **Settings → MCP** можна скопіювати конфігурацію Codex для читання локальних і віддалених журналів. У таблиці **Languages for a chat** додано пошук контактів, а **Copy selected** у діагностиці тепер проходить через звичайну синхронізацію буфера.
+
 ## v0.6.73 — 2026-11-13
 
 After moving KSwitcher, launch it from its current folder. If Windows autostart

Release/SHA256SUMS.txt

@@ -1 +1 @@
-5e47e81f7e96ef0c32d4f6322d8463f4f30b49e44da20052d8351c81b2451867  KSwitcher-win-x64.zip
+51d95639527590b36453a5ef485532a7d2135950222fa197eb431a5309f1a45c  KSwitcher-win-x64.zip

Release/release-files.json

@@ -1,84 +1,84 @@
 {
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+  "version": "0.6.77",
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       "path": "KSwitcher.exe",
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+      "size": 682867,
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     },
     {
-      "size": 20138,
       "path": "dictionaries/LICENSE-CC-BY-SA-4.0.txt",
+      "size": 20138,
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     },
     {
-      "size": 898248,
       "path": "dictionaries/uk.txt",
+      "size": 898248,
       "sha256": "caeb097749d4afc84b68ad96b3d7dfb6a6569561cd32ccce0bee94a13b43ba86"
     },
     {
-      "size": 993,
       "path": "tools/README.txt",
+      "size": 993,
       "sha256": "a34b5161a8315af037e1ec71d816bfc688f7c364141d4ee2347cf0515ef0c82a"
     },
     {
-      "size": 134656,
       "path": "tools/StayHere.exe",
+      "size": 134656,
       "sha256": "6ef5cf64708d62b7fc63c3c793cc99188a513433ff4774cae01dc014f6664376"
     },
     {
-      "size": 2796,
       "path": "tools/StayHere-README.md",
+      "size": 2796,
       "sha256": "ba214e2aca7405e698b3ab21ceb1f41ce088edd996b3e30e4a9d58ff496f9413"
     }
   ],

build.ps1

@@ -46,6 +46,14 @@ try {
     & $compiler -mwindows -municode -static -s '-Wl,--gc-sections' build/lan_channel.o build/lan_input.o build/lan.o build/lan_pairing.o build/core.o build/platform.o build/storage.o build/ocr.o build/screenshot.o build/screenshot_notifications.o build/screenshot_activation.o build/screenshot_main.o build/screenshot-res.o @libs -o $screenshotPath
     if ($LASTEXITCODE) { throw 'Screenshot link failed' }
     Copy-Item -LiteralPath $screenshotPath -Destination build/release/KSwitcher.Screenshot.exe -Force
+    $filesPath = Join-Path (Split-Path $executablePath) 'KSwitcher.Files.exe'
+    $terminalIncludes = & "$root/tools/stage-files-terminal.ps1" -Destination (Split-Path $filesPath)
+    & "$root/tools/stage-files-terminal.ps1" -Destination build/release | Out-Null
+    & windres resources/files.rc -O coff -o build/files-res.o
+    if ($LASTEXITCODE) { throw 'File manager resource compilation failed' }
+    & $compiler @common "-I$terminalIncludes" -mwindows -municode -static -s src/files_main.cpp build/files-res.o -luser32 -lgdi32 -lcomctl32 -lshell32 -lcomdlg32 -ladvapi32 -lole32 -luuid -o $filesPath
+    if ($LASTEXITCODE) { throw 'File manager build failed' }
+    Copy-Item -LiteralPath $filesPath -Destination build/release/KSwitcher.Files.exe -Force
     if ($Test) {
         & $compiler @common -Werror tests/settings_merge.cpp build/sync.o build/storage.o build/core.o build/platform.o build/ocr.o @libs -static -s -o build/KSwitcherSettingsMergeTests.exe
         if ($LASTEXITCODE) { throw 'Settings merge test build failed' }

package.ps1

@@ -6,6 +6,9 @@ New-Item -ItemType Directory -Force $destination | Out-Null
 Copy-Item -LiteralPath (Join-Path $root 'build\release\KSwitcher.exe') -Destination $destination
 Copy-Item -LiteralPath (Join-Path $root 'build\release\KSwitcher.Config.exe') -Destination $destination
 Copy-Item -LiteralPath (Join-Path $root 'build\release\KSwitcher.Screenshot.exe') -Destination $destination
+Copy-Item -LiteralPath (Join-Path $root 'build\release\KSwitcher.Files.exe') -Destination $destination
+Copy-Item -LiteralPath (Join-Path $root 'build\release\WebView2Loader.dll') -Destination $destination
+Copy-Item -LiteralPath (Join-Path $root 'build\release\terminal') -Destination $destination -Recurse -Force
 Copy-Item -LiteralPath (Join-Path $root 'LICENSE') -Destination $destination
 Copy-Item -LiteralPath (Join-Path $root 'vendor\json-LICENSE.txt') -Destination $destination
 Copy-Item -LiteralPath (Join-Path $root 'README.md') -Destination $destination
@@ -16,7 +19,7 @@ Copy-Item -LiteralPath (Join-Path $root 'resources\portable-tools-README.txt') -
 Copy-Item -LiteralPath (Join-Path $root 'build\release\tools\StayHere.exe') -Destination (Join-Path $destination 'tools\StayHere.exe') -Force
 Copy-Item -LiteralPath (Join-Path $root 'utilities\StayHere\README.md') -Destination (Join-Path $destination 'tools\StayHere-README.md') -Force
 # Enumerate the distributable files explicitly; do not include a user's data directory.
-$files = @('KSwitcher.exe','KSwitcher.Config.exe','KSwitcher.Screenshot.exe','LICENSE','json-LICENSE.txt','README.md','LAN-PREVIEW.md','dictionaries','tools\README.txt','tools\StayHere.exe','tools\StayHere-README.md') | ForEach-Object { Join-Path $destination $_ }
+$files = @('KSwitcher.exe','KSwitcher.Config.exe','KSwitcher.Screenshot.exe','KSwitcher.Files.exe','WebView2Loader.dll','terminal','LICENSE','json-LICENSE.txt','README.md','LAN-PREVIEW.md','dictionaries','tools\README.txt','tools\StayHere.exe','tools\StayHere-README.md') | ForEach-Object { Join-Path $destination $_ }
 $entries = foreach ($path in $files) {
     foreach ($file in @(Get-ChildItem -LiteralPath $path -File -Recurse)) {
         @{path=$file.FullName.Substring($destination.Length+1).Replace('\','/'); size=$file.Length; sha256=(Get-FileHash -LiteralPath $file.FullName -Algorithm SHA256).Hash.ToLowerInvariant()}

resources/app.rc

@@ -9,8 +9,8 @@ IDC_SCREENSHOT_PENCIL CURSOR "icons/lucide/pencil.cur"
 1 RT_MANIFEST "app.manifest"
 201 RCDATA "update.ps1"
 1 VERSIONINFO
- FILEVERSION 0,6,73,0
- PRODUCTVERSION 0,6,73,0
+ FILEVERSION 0,6,77,0
+ PRODUCTVERSION 0,6,77,0
  FILEOS VOS_NT_WINDOWS32
  FILETYPE VFT_APP
 BEGIN
@@ -20,7 +20,7 @@ BEGIN
   BEGIN
    VALUE "FileDescription", "KSwitcher — native keyboard and clipboard utility"
    VALUE "ProductName", "KSwitcher"
-   VALUE "FileVersion", "0.6.73"
+   VALUE "FileVersion", "0.6.77"
   END
  END
  BLOCK "VarFileInfo"

resources/files.rc

@@ -0,0 +1,107 @@
+#include <windows.h>
+
+1 ICON "kswitcher-files.ico"
+1 RT_MANIFEST "app.manifest"
+
+101 DIALOGEX 0, 0, 256, 141
+STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
+CAPTION "Wide panel mode"
+FONT 9, "Segoe UI"
+BEGIN
+    GROUPBOX "Panel columns — Name, Size", -1, 8, 6, 240, 59
+    LTEXT "Size column &width (6-16 characters)", -1, 17, 22, 166, 10
+    EDITTEXT 201, 196, 18, 41, 14, ES_NUMBER | ES_AUTOHSCROLL
+    AUTOCHECKBOX "&Align file extensions", 202, 17, 42, 104, 12
+    AUTOCHECKBOX "Align &folder extensions", 204, 130, 42, 108, 12
+    GROUPBOX "Status line columns", -1, 8, 72, 240, 39
+    AUTOCHECKBOX "Show &details", 203, 17, 83, 94, 11
+    AUTOCHECKBOX "Name", 205, 17, 96, 47, 11
+    AUTOCHECKBOX "Size", 206, 72, 96, 42, 11
+    AUTOCHECKBOX "Date", 207, 128, 96, 45, 11
+    AUTOCHECKBOX "Time", 208, 185, 96, 45, 11
+    DEFPUSHBUTTON "OK", IDOK, 139, 119, 50, 14
+    PUSHBUTTON "Cancel", IDCANCEL, 196, 119, 50, 14
+END
+
+102 DIALOGEX 0, 0, 350, 114
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Copy"
+FONT 10, "Consolas"
+BEGIN
+    LTEXT "Copy to", 210, 14, 15, 322, 12, SS_PATHELLIPSIS
+    CONTROL "", 211, "Edit", ES_MULTILINE | ES_AUTOHSCROLL | WS_TABSTOP, 14, 29, 322, 18
+    LTEXT "Existing files:", 212, 14, 61, 122, 14, SS_CENTERIMAGE
+    COMBOBOX 213, 140, 61, 196, 100, CBS_DROPDOWNLIST | CBS_OWNERDRAWFIXED | CBS_HASSTRINGS | WS_VSCROLL | WS_TABSTOP
+    CONTROL "Also ask on read-only files", 214, "Button", BS_OWNERDRAW | WS_TABSTOP, 14, 81, 322, 14
+    CONTROL "&Copy", IDOK, "Button", BS_OWNERDRAW | WS_TABSTOP, 87, 96, 86, 18
+    CONTROL "&Cancel", IDCANCEL, "Button", BS_OWNERDRAW | WS_TABSTOP, 177, 96, 86, 18
+END
+
+103 DIALOGEX 0, 0, 460, 126
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Copying"
+FONT 10, "Consolas"
+BEGIN
+    LTEXT "Counting files...", 220, 12, 16, 436, 12, SS_OWNERDRAW
+    LTEXT "", 221, 12, 31, 436, 12, SS_OWNERDRAW
+    CONTROL "", 222, "msctls_progress32", PBS_SMOOTH, 12, 46, 436, 14
+    LTEXT "Files:", 224, 12, 63, 436, 12
+    LTEXT "Bytes:", 225, 12, 77, 436, 12
+    CONTROL "", 226, "msctls_progress32", PBS_SMOOTH, 12, 91, 436, 14
+    LTEXT "", 228, 12, 60, 1, 1
+    LTEXT "", 229, 12, 104, 1, 1
+    CONTROL "&Cancel", IDCANCEL, "Button", BS_OWNERDRAW | WS_TABSTOP, 187, 106, 86, 18
+END
+
+104 DIALOGEX 0, 0, 360, 106
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Warning"
+FONT 10, "Consolas"
+BEGIN
+    LTEXT "", 230, 12, 16, 336, 12
+    LTEXT "", 231, 12, 33, 336, 12, SS_PATHELLIPSIS
+    LTEXT "", 233, 12, 55, 1, 1
+    LTEXT "", 234, 12, 81, 1, 1
+    CONTROL "Remember choice", 232, "Button", BS_OWNERDRAW | WS_TABSTOP, 12, 57, 336, 18
+    CONTROL "&Overwrite", IDYES, "Button", BS_OWNERDRAW | WS_TABSTOP, 42, 89, 110, 18
+    CONTROL "&Skip", IDNO, "Button", BS_OWNERDRAW | WS_TABSTOP, 158, 89, 68, 18
+    CONTROL "&Cancel", IDCANCEL, "Button", BS_OWNERDRAW | WS_TABSTOP, 232, 89, 86, 18
+END
+
+105 DIALOGEX 0, 0, 310, 65
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Cancel copy"
+FONT 10, "Consolas"
+BEGIN
+    CTEXT "Do you really want to cancel copying?", 235, 12, 17, 286, 16, SS_CENTERIMAGE
+    LTEXT "", 236, 12, 38, 1, 1
+    CONTROL "&Yes", IDYES, "Button", BS_OWNERDRAW | WS_TABSTOP, 83, 42, 68, 18
+    CONTROL "&No", IDNO, "Button", BS_OWNERDRAW | WS_TABSTOP, 159, 42, 68, 18
+END
+
+106 DIALOGEX 0, 0, 400, 190
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Delete"
+FONT 10, "Consolas"
+BEGIN
+    LTEXT "", 240, 14, 14, 372, 16
+    LTEXT "", 241, 14, 32, 372, 122, SS_NOPREFIX
+    LTEXT "", 243, 14, 177, 1, 1
+    CONTROL "&Move", IDYES, "Button", BS_OWNERDRAW | WS_TABSTOP, 37, 178, 86, 18
+    CONTROL "&All", 244, "Button", BS_OWNERDRAW | WS_TABSTOP, 129, 178, 63, 18
+    CONTROL "&Skip", IDNO, "Button", BS_OWNERDRAW | WS_TABSTOP, 197, 178, 63, 18
+    CONTROL "Skip a&ll", 249, "Button", BS_OWNERDRAW | WS_TABSTOP, 197, 178, 94, 18
+    CONTROL "&Cancel", IDCANCEL, "Button", BS_OWNERDRAW | WS_TABSTOP, 265, 178, 79, 18
+END
+
+107 DIALOGEX 0, 0, 400, 82
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP
+CAPTION "Deleting"
+FONT 10, "Consolas"
+BEGIN
+    LTEXT "Scanning...", 245, 14, 15, 372, 14, SS_PATHELLIPSIS | SS_NOPREFIX
+    LTEXT "", 246, 14, 31, 372, 14
+    CONTROL "", 247, "msctls_progress32", PBS_SMOOTH, 14, 48, 372, 18
+    LTEXT "", 248, 14, 73, 1, 1
+    CONTROL "&Cancel", IDCANCEL, "Button", BS_OWNERDRAW | WS_TABSTOP, 157, 74, 86, 18
+END

resources/terminal/index.html

@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+<meta charset="utf-8">
+<meta http-equiv="Content-Security-Policy" content="default-src 'none'; script-src 'self'; style-src 'self' 'unsafe-inline'">
+<title>PowerShell terminal</title>
+<link rel="stylesheet" href="xterm.css">
+<style>
+html, body, #terminal { width:100%; height:100%; margin:0; overflow:hidden; background:#181818; }
+</style>
+<div id="terminal"></div>
+<script src="xterm.js"></script>
+<script src="addon-fit.js"></script>
+<script src="terminal.js"></script>
+</html>

resources/terminal/terminal.js

@@ -0,0 +1,89 @@
+const bridge = window.chrome.webview;
+const terminal = new Terminal({
+  fontFamily: 'Consolas, monospace',
+  fontSize: 16,
+  cursorBlink: false,
+  stdinDisabled: true,
+  theme: { background: '#181818', foreground: '#e8e8e8' },
+});
+const fit = new FitAddon.FitAddon();
+terminal.loadAddon(fit);
+const host = document.getElementById('terminal');
+terminal.open(host);
+host.addEventListener('pointerup', () => bridge.postMessage('focus-input'), true);
+const screen = host.querySelector('.xterm-screen');
+let traceEnabled = false;
+let traceBudget = 4096;
+let currentOffset = 0;
+function trace(phase) {
+  if (!traceEnabled || traceBudget <= 0) return;
+  traceBudget--;
+  const buffer = terminal.buffer.active;
+  bridge.postMessage(`trace:${phase},${host.clientHeight},${terminal.rows},${buffer.viewportY},${buffer.baseY},${Math.round(currentOffset)}`);
+}
+function anchorOutput() {
+  const buffer = terminal.buffer.active;
+  let offset = 0;
+  if (buffer.type === 'normal' && buffer.viewportY === buffer.baseY) {
+    let last = 0;
+    for (let row = terminal.rows - 1; row >= 0; row--) {
+      if (buffer.getLine(buffer.baseY + row)?.translateToString(true)) {
+        last = row;
+        break;
+      }
+    }
+    offset = Math.max(0, terminal.rows - 1 - last) * screen.offsetHeight / terminal.rows;
+  }
+  screen.style.transform = `translateY(${offset}px)`;
+  currentOffset = offset;
+  trace(2);
+}
+terminal.attachCustomKeyEventHandler(event => {
+  if (event.type !== 'keydown' || !event.ctrlKey || event.altKey || event.shiftKey) return true;
+  if (event.code === 'KeyO') bridge.postMessage('toggle');
+  else if (event.code === 'ArrowUp') bridge.postMessage('grow');
+  else if (event.code === 'ArrowDown') bridge.postMessage('shrink');
+  else return true;
+  event.preventDefault();
+  return false;
+});
+const reportSize = () => bridge.postMessage(`size:${terminal.cols},${terminal.rows}`);
+terminal.onResize(reportSize);
+terminal.onScroll(() => {
+  trace(3);
+  anchorOutput();
+});
+bridge.addEventListener('message', ({ data }) => {
+  if (data === 'trace:on') {
+    traceEnabled = true;
+    trace(2);
+    return;
+  }
+  const font = /^font:(\d+):(\d+):([01]):(.*)$/u.exec(data);
+  if (font) {
+    const [, points, weight, italic, family] = font;
+    const quotedFamily = family.replace(/["\\]/g, '\\$&');
+    terminal.options.fontFamily = `"${quotedFamily}", monospace`;
+    terminal.options.fontSize = Number(points) * 96 / 720;
+    terminal.options.fontWeight = Number(weight);
+    host.style.fontStyle = italic === '1' ? 'italic' : 'normal';
+    fit.fit();
+    anchorOutput();
+    return;
+  }
+  const bytes = new Uint8Array(data.length / 2);
+  for (let i = 0; i < bytes.length; i++) bytes[i] = parseInt(data.slice(2*i, 2*i+2), 16);
+  terminal.write(bytes, anchorOutput);
+});
+new ResizeObserver(() => {
+  const buffer = terminal.buffer.active;
+  const wasAtBottom = buffer.viewportY === buffer.baseY;
+  trace(0);
+  fit.fit();
+  trace(1);
+  if (wasAtBottom) terminal.scrollToBottom();
+  requestAnimationFrame(anchorOutput);
+}).observe(host);
+bridge.postMessage('ready');
+fit.fit();
+reportSize();

src/app.cpp

@@ -188,6 +188,7 @@ class Transaction
     ClipboardSnapshot snapshot;
     DWORD expected{};
     bool captured{};
+    bool clipboardModified{};
     mutable bool invalidLogged{};
     unsigned copyNumber{};
     std::wstring adopted;
@@ -210,9 +211,14 @@ class Transaction
                 expected = GetClipboardSequenceNumber();
                 try
                 {
+                    auto started = GetTickCount64();
+                    const bool image = IsClipboardFormatAvailable(CF_DIB) || IsClipboardFormatAvailable(CF_DIBV5) ||
+                        IsClipboardFormatAvailable(CF_BITMAP) || IsClipboardFormatAvailable(RegisterClipboardFormatW(L"PNG"));
                     snapshot.capture(app.window, expected);
                     if (expected != GetClipboardSequenceNumber())
                         throw std::runtime_error("Clipboard changed while taking snapshot");
+                    diagnosticEvent(L"Clipboard snapshot captured: elapsedMs=" +
+                        std::to_wstring(GetTickCount64() - started) + L" image=" + std::to_wstring(image));
                     break;
                 }
                 catch (...)
@@ -236,10 +242,12 @@ class Transaction
     ~Transaction()
     {
         if (farSnippet) finishSelection(false);
-        if (captured && GetClipboardSequenceNumber() == expected)
+        if (captured && clipboardModified && GetClipboardSequenceNumber() == expected)
             try
             {
+                auto started = GetTickCount64();
                 app.ownSequence = snapshot.restore(app.window, expected);
+                diagnosticEvent(L"Clipboard snapshot restored: elapsedMs=" + std::to_wstring(GetTickCount64() - started));
             }
             catch (...)
             {
@@ -296,6 +304,7 @@ class Transaction
         auto temporary = c;
         const std::wstring exclusion = L"ExcludeClipboardContentFromMonitorProcessing";
         temporary.formats.push_back({RegisterClipboardFormatW(exclusion.c_str()), exclusion, Bytes{0}});
+        clipboardModified = true;
         app.ownSequence = expected = writeClipboard(app.window, temporary);
         // A concurrent writer can win immediately after CloseClipboard, before we read its sequence.
         // Never adopt that writer's sequence as our own and paste its content.
@@ -811,11 +820,13 @@ void App::addTray()
     NOTIFYICONDATAW icon{sizeof(icon)};
     icon.hWnd = window;
     icon.uID = 1;
-    icon.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
+    icon.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP | NIF_SHOWTIP;
     icon.uCallbackMessage = TrayMessage;
     icon.hIcon = (HICON)LoadImageW(instance, MAKEINTRESOURCEW(IDI_KSWITCHER), IMAGE_ICON,
                                    GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON), LR_SHARED);
-    wcscpy_s(icon.szTip, localBuildTitle(L"KSwitcher — keyboard layouts & clipboard").c_str());
+    auto tip = incomingLanFileCount ? L"KSwitcher — files ready to save: " + std::to_wstring(incomingLanFileCount)
+                                    : localBuildTitle(L"KSwitcher — keyboard layouts & clipboard");
+    wcsncpy_s(icon.szTip, tip.c_str(), _TRUNCATE);
     if (Shell_NotifyIconW(NIM_ADD, &icon))
     {
         KillTimer(window, TrayRetryTimer);
@@ -2026,7 +2037,8 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                 DiagnosticJson record{{"attempt", std::to_string(attempt)}, {"process", utf8(processName(target))},
                     {"command", transformCommandName(command)}, {"source", "Unknown"}, {"target", "Unknown"},
                     {"outcome", "busy"}, {"verification", "not-attempted"}, {"problem", true},
-                    {"elapsedMs", GetTickCount64() - requestedAt}};
+                    {"elapsedMs", GetTickCount64() - requestedAt},
+                    {"activeAttempt", activeTransformAttempt.load()}};
                 diagnosticOperation(record.dump());
             }
             catch (...) {}
@@ -2038,6 +2050,7 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
         autoPending = false;
         snippetPending = -1;
     }
+    activeTransformAttempt = attempt;
     Run recent;
     std::optional<LastTransform> previous;
     Settings config;
@@ -2059,20 +2072,24 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
             struct BusyReset
             {
                 std::atomic<bool> &b;
+                std::atomic<uint64_t> &active;
                 HWND window;
                 bool deferred{};
                 ~BusyReset()
                 {
+                    active = 0;
                     if (deferred)
                         PostMessageW(window, ReplayTypingMessage, 0, 0);
                     else
                         b = false;
                 }
-            } reset{busy, window, preDeferred};
+            } reset{busy, activeTransformAttempt, window, preDeferred};
+            const auto workerStarted = GetTickCount64();
             auto effectiveChat = requestedChat;
             if (lower(processName(target)) == L"chrome") effectiveChat = readChromeChat(target);
             config.cycle = chatCycle(config, languageProfileKey(config, target, effectiveChat), available);
             auto start = GetTickCount64();
+            ULONGLONG verificationMs{};
             std::wstring reason = L"cancelled-before-selection";
             std::wstring text, result, expected, actual, verification = L"not-attempted";
             int hint = -1, to = command >= Direct ? command - Direct : -1;
@@ -2087,6 +2104,8 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                             expected += key == L' ' ? L' ' : layout.at(physicalLayout().code(key));
                 }
                 diagnosticEvent(L"Transform context id=" + std::to_wstring(attempt) +
+                    L" queueMs=" + std::to_wstring(workerStarted - requestedAt) +
+                    L" profileMs=" + std::to_wstring(start - workerStarted) +
                     L" layouts=" + layoutIds + L" physicalKeys=" + diagnosticText(recent.keys) +
                     L" trackedExpected=" + diagnosticText(expected));
             }
@@ -2096,6 +2115,7 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                 HWND target;
                 uint64_t version, attempt;
                 ULONGLONG start;
+                const ULONGLONG &verificationMs;
                 bool enabled;
                 std::wstring &reason;
                 std::wstring &text, &result, &expected;
@@ -2116,7 +2136,8 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                                 {"outcome", utf8(reason)}, {"verification", utf8(verification)},
                                 {"problem", reason != L"Paste verified" && reason != L"layout-only" &&
                                     !(command == 0 && reason == L"paste-sent-unverified")},
-                                {"elapsedMs", GetTickCount64() - start}, {"foregroundSame", GetForegroundWindow() == target},
+                                {"elapsedMs", GetTickCount64() - start}, {"verificationMs", verificationMs},
+                                {"foregroundSame", GetForegroundWindow() == target},
                                 {"inputSame", app.inputVersion.load() == version}, {"original", bounded(text)},
                                 {"expected", bounded(verification == L"selection-mismatch" ? expected : result)}, {"actual", bounded(actual)},
                                 {"selectionExpected", bounded(expected)},
@@ -2126,7 +2147,7 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                         }
                         catch (...) {} // Logging must never abort a completed input transaction.
                 }
-            } audit{*this, target, version, attempt, requestedAt, manual || snippet >= 0, reason, text, result, expected,
+            } audit{*this, target, version, attempt, requestedAt, verificationMs, manual || snippet >= 0, reason, text, result, expected,
                     actual, verification, hint, to, command, available};
             try
             {
@@ -2191,7 +2212,12 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                     bool farEditor;
                     ~SelectionReset() { if (selected && !farEditor && valid()) chord(VK_RIGHT); }
                 } selectionReset{autoSelected, valid, farSnippet};
+                reason = L"context-changed-before-snapshot";
+                if (!valid()) return;
+                reason = L"clipboard-snapshot";
                 Transaction tx(*this, target, version, farSnippet, snippetEditor);
+                reason = L"context-changed-before-selection";
+                if (!tx.valid()) return;
                 reason = L"selection-unavailable";
                 diagnosticEvent(L"Transform target=" + processName(target) + L" command=" + std::to_wstring(command) +
                     L" recent=" + std::to_wstring(config.recent) + L" keys=" +
@@ -2311,6 +2337,11 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                         std::to_wstring(recent.keys.size()) + L" match=" + std::to_wstring(hint));
                     if (hint < 0)
                     {
+                        if (!tx.valid())
+                        {
+                            reason = L"context-changed-during-selection";
+                            return;
+                        }
                         actual = text;
                         verification = L"selection-mismatch";
                         reason = text.empty() ? L"recent-copy-empty" : L"recent-verification-mismatch";
@@ -2386,7 +2417,10 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                 }
                 bool sent = false;
                 const bool requireReadback = tx.recoveredSelection() || snippet >= 0;
+                auto probeStarted = GetTickCount64();
                 PasteProbe probe(!farSnippet && ((config.writeLog && manual) || requireReadback) && result != text, text, target);
+                verificationMs = GetTickCount64() - probeStarted;
+                diagnosticEvent(L"Paste probe prepared: elapsedMs=" + std::to_wstring(verificationMs) + L" status=" + probe.status);
                 if (requireReadback && !farSnippet && result != text && probe.status != L"ready")
                 {
                     verification = probe.status;
@@ -2424,6 +2458,7 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                     verification = probe.status;
                     if (tx.valid())
                     {
+                        auto readStarted = GetTickCount64();
                         auto observed = farSnippet ? tx.readFarSnippet(caretSteps(result)) :
                                                      probe.read((int)caretSteps(result));
                         // A native Edit may silently ignore Ctrl+V while the clipboard is busy.
@@ -2437,6 +2472,7 @@ void App::transform(int command, int snippet, size_t snippetLength, HWND snippet
                             else
                                 observed.reset();
                         }
+                        verificationMs += GetTickCount64() - readStarted;
                         verification = farSnippet ? (observed ? L"read-back-via-far-clipboard" :
                                                                  L"far-readback-unavailable") : probe.status;
                         if (observed && tx.valid())
@@ -2733,6 +2769,7 @@ void App::trayMenu()
     AppendMenuW(menu, MF_STRING, 10, L"Clipboard &history");
     AppendMenuW(menu, MF_STRING, 24, L"&Capture screen region…");
     AppendMenuW(menu, MF_STRING, 11, L"&Settings…");
+    AppendMenuW(menu, MF_STRING, 25, L"&Files…");
     SetMenuDefaultItem(menu, 11, FALSE);
     AppendMenuW(menu, MF_STRING, 12, L"S&nippets…");
     AppendMenuW(menu, MF_STRING, 13, L"&Keyboard shortcuts…");
@@ -2785,6 +2822,20 @@ void App::trayMenu()
         }
         switch (cmd)
         {
+        case 25:
+        {
+            auto path = std::filesystem::path(executable()).parent_path() / L"KSwitcher.Files.exe";
+            auto command = L"\"" + path.wstring() + L"\"";
+            STARTUPINFOW startup{sizeof(startup)};
+            PROCESS_INFORMATION process{};
+            if (!CreateProcessW(path.c_str(), command.data(), nullptr, nullptr, FALSE, 0, nullptr,
+                                path.parent_path().c_str(), &startup, &process))
+                throw std::runtime_error(utf8(lastError(L"Cannot start KSwitcher Files")));
+            AllowSetForegroundWindow(process.dwProcessId);
+            CloseHandle(process.hThread);
+            CloseHandle(process.hProcess);
+            break;
+        }
         case 24:
             dispatch(Screenshot);
             break;
@@ -2985,7 +3036,10 @@ LRESULT CALLBACK App::windowProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
         return 0;
     case TrayMessage:
         if (LOWORD(lp) == NIN_BALLOONUSERCLICK)
-            showLogs(*app);
+        {
+            if (std::exchange(app->incomingFileBalloon, false)) app->dispatch(20);
+            else showLogs(*app);
+        }
         else if (LOWORD(lp) == WM_CONTEXTMENU)
             app->trayMenu();
         else if (LOWORD(lp) == WM_LBUTTONDBLCLK)
@@ -3057,9 +3111,30 @@ LRESULT CALLBACK App::windowProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp)
         wcsncpy_s(icon.szInfo, text->c_str(), _TRUNCATE);
         wcscpy_s(icon.szInfoTitle, L"KSwitcher");
         icon.dwInfoFlags = NIIF_WARNING;
+        app->incomingFileBalloon = false;
         Shell_NotifyIconW(NIM_MODIFY, &icon);
         return 0;
     }
+    case LanFilesChangedMessage:
+    {
+        app->incomingLanFileCount = wp;
+        NOTIFYICONDATAW icon{sizeof(icon)};
+        icon.hWnd = hwnd;
+        icon.uID = 1;
+        icon.uFlags = NIF_TIP | NIF_SHOWTIP;
+        auto tip = wp ? L"KSwitcher — files ready to save: " + std::to_wstring(wp)
+                      : localBuildTitle(L"KSwitcher — keyboard layouts & clipboard");
+        wcsncpy_s(icon.szTip, tip.c_str(), _TRUNCATE);
+        if (lp)
+        {
+            icon.uFlags |= NIF_INFO;
+            wcscpy_s(icon.szInfoTitle, L"Incoming file ready to save");
+            wcscpy_s(icon.szInfo, L"Open Settings → Computers → Manage computers → Incoming files.");
+            icon.dwInfoFlags = NIIF_INFO;
+        }
+        if (Shell_NotifyIconW(NIM_MODIFY, &icon) && lp) app->incomingFileBalloon = true;
+        return 0;
+    }
     case CheckAutostartMessage:
         app->checkAutostartPath();
         return 0;

src/app.h

@@ -162,6 +162,9 @@ class App
     UINT taskbarCreated{};
     bool trayRetryPending{};
     uint64_t transformAttempt{}, previousAttemptVersion{};
+    size_t incomingLanFileCount{};
+    bool incomingFileBalloon{};
+    std::atomic<uint64_t> activeTransformAttempt{};
     ULONGLONG previousAttemptAt{};
     HWND previousAttemptWindow{};
     int previousAttemptCommand{}, repeatAttempts{};

src/autocorrect.cpp

@@ -245,18 +245,20 @@ std::optional<AutoSuggestion> AutoCorrector::suggest(const std::wstring &typed,
     const std::wstring alphabet = sourceLanguage == L"en" ? L"abcdefghijklmnopqrstuvwxyz" :
         sourceLanguage == L"uk" ? L"абвгґдеєжзиіїйклмнопрстуфхцчшщьюя" : L"абвгдеёжзийклмнопрстуфхцчшщъыьэюя";
     auto small = lower(word);
+    bool inCycle = std::find(settings.cycle.begin(), settings.cycle.end(), layouts[source].id) != settings.cycle.end();
     bool sameLanguage = safeAutoWord(word, settings.autoMinLength) &&
-        small.find_first_not_of(alphabet) == small.npos &&
-        std::find(settings.cycle.begin(), settings.cycle.end(), layouts[source].id) != settings.cycle.end();
+        small.find_first_not_of(alphabet) == small.npos && inCycle;
     auto sameLayout = [&](std::wstring text)
     {
         if (word != small) text[0] = upper(text.substr(0, 1))[0];
         return AutoSuggestion{source, source, prefix + text + suffix};
     };
-    if (settings.autoReplace && sameLanguage)
+    if (settings.autoReplace && inCycle)
     {
         auto replacement = settings.autoReplacements.find(small);
         if (replacement != settings.autoReplacements.end() &&
+            (word == small || (word.substr(1) == small.substr(1) && word != upper(word))) &&
+            validAutoReplacementSource(small, alphabet) &&
             validAutoCorrection(replacement->second, alphabet))
             return sameLayout(replacement->second);
     }

src/config_main.cpp

@@ -1,6 +1,7 @@
 #include "configuration.h"
 #include <commctrl.h>
 #include <cstring>
+#include "mcp_logs.h"
 
 namespace ks
 {
@@ -156,6 +157,26 @@ void App::setHotkeyCapture(HWND field)
 }
 void App::clearLog(bool previous) { request(*this, ConfigClearLog, Bytes{static_cast<unsigned char>(previous)}); }
 
+int runMcpConfigurator(HINSTANCE instance)
+{
+    App app(instance);
+    WNDCLASSW cls{};
+    cls.lpfnWndProc = controller;
+    cls.hInstance = instance;
+    cls.lpszClassName = L"KSwitcher.Config.MCP";
+    RegisterClassW(&cls);
+    app.window = CreateWindowExW(0, cls.lpszClassName, L"", 0, 0, 0, 0, 0,
+                                 HWND_MESSAGE, nullptr, instance, nullptr);
+    auto result = runLogMcp([&](const Bytes &payload)
+    {
+        service = FindWindowW(L"KSwitcher.Main", L"KSwitcher");
+        if (!app.window || !service) throw std::runtime_error("Start KSwitcher before reading remote logs.");
+        return request(app, ConfigLan, payload);
+    });
+    if (app.window) DestroyWindow(app.window);
+    return result;
+}
+
 int runConfigurator(HINSTANCE instance, bool snippets, bool logs)
 {
     HANDLE singleton = CreateMutexW(nullptr, TRUE, L"Local\\KSwitcher.Config.Singleton");
@@ -236,8 +257,9 @@ int WINAPI wWinMain(HINSTANCE instance, HINSTANCE, PWSTR, int)
         int count{}; auto args = CommandLineToArgvW(GetCommandLineW(), &count);
         bool snippets = count > 1 && std::wstring(args[1]) == L"--snippets";
         bool logs = count > 1 && std::wstring(args[1]) == L"--logs";
+        bool mcp = count > 1 && std::wstring(args[1]) == L"--mcp";
         LocalFree(args);
-        result = ks::runConfigurator(instance, snippets, logs);
+        result = mcp ? ks::runMcpConfigurator(instance) : ks::runConfigurator(instance, snippets, logs);
     }
     catch (const std::exception &e)
     {

src/core.cpp

@@ -35,6 +35,11 @@ bool validAutoCorrection(const std::wstring &text, const std::wstring &alphabet)
     }
     return true;
 }
+bool validAutoReplacementSource(const std::wstring &text, const std::wstring &alphabet)
+{
+    return text.find(L' ') == text.npos && text.find_first_of(alphabet) != text.npos &&
+           validAutoCorrection(text, alphabet + L"0123456789");
+}
 int HotkeyHook::update(UINT key, bool down, UINT modifiers,
                        const std::vector<std::pair<int, Hotkey>> &bindings)
 {

src/core.h

@@ -21,6 +21,7 @@ struct Layout
 };
 bool letter(wchar_t ch);
 bool validAutoCorrection(const std::wstring &text, const std::wstring &alphabet);
+bool validAutoReplacementSource(const std::wstring &text, const std::wstring &alphabet);
 std::wstring lower(std::wstring text);
 std::wstring upper(std::wstring text);
 std::wstring convert(const std::wstring &, const Layout &, const Layout &, bool force = false);

src/files_terminal.h

@@ -0,0 +1,110 @@
+#pragma once
+
+#include <mutex>
+#include <string>
+#include <thread>
+#include <vector>
+
+// The reader keeps draining the output pipe while ClosePseudoConsole shuts down.
+class FilesTerminal
+{
+public:
+    ~FilesTerminal() { close(); }
+
+    bool start(const wchar_t *directory, COORD size)
+    {
+        if(alive()) return true;
+        close();
+        pending.clear();
+        HANDLE inputRead{}, outputWrite{};
+        if(!CreatePipe(&inputRead,&input,nullptr,0)) return false;
+        if(!CreatePipe(&output,&outputWrite,nullptr,0))
+        {
+            CloseHandle(inputRead);
+            close();
+            return false;
+        }
+        const auto created=CreatePseudoConsole(size,inputRead,outputWrite,0,&console);
+        CloseHandle(inputRead);
+        CloseHandle(outputWrite);
+        if(FAILED(created)) { close(); return false; }
+        reader=std::thread([this]
+        {
+            char buffer[4096];
+            DWORD count{};
+            while(ReadFile(output,buffer,sizeof(buffer),&count,nullptr) && count)
+            {
+                std::lock_guard lock(mutex);
+                pending.append(buffer,count);
+                if(pending.size()>1024*1024) pending.erase(0,pending.size()-1024*1024);
+            }
+        });
+
+        SIZE_T bytes{};
+        InitializeProcThreadAttributeList(nullptr,1,0,&bytes);
+        std::vector<unsigned char> storage(bytes);
+        auto attributes=reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(storage.data());
+        if(!InitializeProcThreadAttributeList(attributes,1,0,&bytes)) { close(); return false; }
+        STARTUPINFOEXW startup{};
+        startup.StartupInfo.cb=sizeof(startup);
+        startup.lpAttributeList=attributes;
+        PROCESS_INFORMATION info{};
+        wchar_t command[]=L"powershell.exe -NoLogo -NoProfile -NoExit -Command \"Remove-Module PSReadLine -ErrorAction SilentlyContinue; function global:prompt { ([string][char]27) + '[?25l' }; Clear-Host\"";
+        wchar_t system[MAX_PATH]{};
+        const auto length=GetSystemDirectoryW(system,MAX_PATH);
+        const auto shell=std::wstring(system)+L"\\WindowsPowerShell\\v1.0\\powershell.exe";
+        const bool started=length && length<MAX_PATH &&
+            UpdateProcThreadAttribute(attributes,0,PROC_THREAD_ATTRIBUTE_PSEUDOCONSOLE,
+                console,sizeof(console),nullptr,nullptr) &&
+            CreateProcessW(shell.c_str(),command,nullptr,nullptr,FALSE,EXTENDED_STARTUPINFO_PRESENT,
+                nullptr,directory,&startup.StartupInfo,&info);
+        DeleteProcThreadAttributeList(attributes);
+        if(!started) { close(); return false; }
+        process=info.hProcess;
+        CloseHandle(info.hThread);
+        return true;
+    }
+
+    bool alive() const { return process && WaitForSingleObject(process,0)==WAIT_TIMEOUT; }
+
+    bool write(const std::wstring &value)
+    {
+        if(!alive()) return false;
+        const int length=WideCharToMultiByte(CP_UTF8,0,value.data(),static_cast<int>(value.size()),
+            nullptr,0,nullptr,nullptr);
+        if(!length) return false;
+        std::string utf8(length,'\0');
+        WideCharToMultiByte(CP_UTF8,0,value.data(),static_cast<int>(value.size()),
+            utf8.data(),length,nullptr,nullptr);
+        DWORD written{};
+        return WriteFile(input,utf8.data(),length,&written,nullptr) && written==utf8.size();
+    }
+
+    void resize(COORD size) { if(console) ResizePseudoConsole(console,size); }
+
+    std::string takeOutput()
+    {
+        std::lock_guard lock(mutex);
+        std::string result;
+        result.swap(pending);
+        return result;
+    }
+
+    void close()
+    {
+        if(input) CloseHandle(input);
+        if(console) ClosePseudoConsole(console);
+        if(reader.joinable()) reader.join();
+        if(output) CloseHandle(output);
+        if(process) CloseHandle(process);
+        input=output=process=nullptr;
+        console=nullptr;
+    }
+
+private:
+    HPCON console{};
+    HANDLE input{},output{},process{};
+    std::thread reader;
+    std::mutex mutex;
+    std::string pending;
+};

src/files_terminal_view.h

@@ -0,0 +1,186 @@
+#pragma once
+#include <WebView2.h>
+
+#ifdef __MINGW32__
+__CRT_UUID_DECL(ICoreWebView2_3, 0xA0D6DF20, 0x3B92, 0x416D, 0xAA, 0x0C, 0x43, 0x7A, 0x9C, 0x72, 0x78, 0x57)
+__CRT_UUID_DECL(ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler, 0x4e8a3389, 0xc9d8, 0x4bd2, 0xb6, 0xb5, 0x12, 0x4f, 0xee, 0x6c, 0xc1, 0x4d)
+__CRT_UUID_DECL(ICoreWebView2CreateCoreWebView2ControllerCompletedHandler, 0x6c4819f3, 0xc9b7, 0x4260, 0x81, 0x27, 0xc9, 0xf5, 0xbd, 0xe7, 0xf6, 0x8c)
+__CRT_UUID_DECL(ICoreWebView2WebMessageReceivedEventHandler, 0x57213f19, 0x00e6, 0x49fa, 0x8e, 0x07, 0x89, 0x8e, 0xa0, 0x1e, 0xcb, 0xd2)
+__CRT_UUID_DECL(ICoreWebView2NewWindowRequestedEventHandler, 0xd4c185fe, 0xc81c, 0x4989, 0x97, 0xaf, 0x2d, 0x3f, 0xa7, 0xab, 0x56, 0x51)
+__CRT_UUID_DECL(ICoreWebView2NavigationStartingEventHandler, 0x9adbe429, 0xf36d, 0x432b, 0x9d, 0xdc, 0xf8, 0x88, 0x1f, 0xbd, 0x76, 0xe3)
+#endif
+#include <wrl/client.h>
+#include <functional>
+#include <memory>
+#include <utility>
+
+template<class Interface, class... Args>
+class TerminalCallback final : public Interface
+{
+    ULONG refs=1;
+    std::function<HRESULT(Args...)> invoke;
+public:
+    explicit TerminalCallback(std::function<HRESULT(Args...)> fn):invoke(std::move(fn)) {}
+    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid,void **value) override
+    {
+        if(iid!=IID_IUnknown && iid!=__uuidof(Interface)) { *value=nullptr; return E_NOINTERFACE; }
+        *value=static_cast<Interface*>(this);
+        AddRef();
+        return S_OK;
+    }
+    ULONG STDMETHODCALLTYPE AddRef() override { return ++refs; }
+    ULONG STDMETHODCALLTYPE Release() override
+    {
+        const auto remaining=--refs;
+        if(!remaining) delete this;
+        return remaining;
+    }
+    HRESULT STDMETHODCALLTYPE Invoke(Args... args) override { return invoke(args...); }
+};
+
+template<class Interface,class... Args,class Fn>
+auto terminalCallback(Fn fn)
+{
+    Microsoft::WRL::ComPtr<Interface> result;
+    result.Attach(new TerminalCallback<Interface,Args...>(std::move(fn)));
+    return result;
+}
+
+class FilesTerminalView
+{
+    Microsoft::WRL::ComPtr<ICoreWebView2Controller> controller;
+    Microsoft::WRL::ComPtr<ICoreWebView2> web;
+    HMODULE loader{};
+    bool ready{};
+    bool visible{};
+    int viewportHeight{};
+public:
+    bool initialized() const { return ready; }
+    void enableTrace() { if(ready) web->PostWebMessageAsString(L"trace:on"); }
+    void setFont(const LOGFONTW &font,int points)
+    {
+        if(!ready) return;
+        const auto message=L"font:"+std::to_wstring(points)+L":"+
+            std::to_wstring(font.lfWeight?font.lfWeight:FW_NORMAL)+L":"+
+            std::to_wstring(font.lfItalic!=0)+L":"+font.lfFaceName;
+        web->PostWebMessageAsString(message.c_str());
+    }
+    void layout(HWND host,bool show,int fullHeight)
+    {
+        visible=show;
+        viewportHeight=fullHeight;
+        if(!controller) return;
+        RECT bounds{};
+        GetClientRect(host,&bounds);
+        bounds.top=bounds.bottom-viewportHeight;
+        RECT current{};
+        if(FAILED(controller->get_Bounds(&current)) || !EqualRect(&current,&bounds))
+            controller->put_Bounds(bounds);
+        BOOL currentVisibility{};
+        if(FAILED(controller->get_IsVisible(&currentVisibility)) || !!currentVisibility!=show)
+            controller->put_IsVisible(show);
+    }
+    void close()
+    {
+        if(controller) controller->Close();
+        web.Reset();
+        controller.Reset();
+        ready=false;
+    }
+    bool send(const std::string &bytes)
+    {
+        if(!ready) return false;
+        constexpr wchar_t hex[]=L"0123456789abcdef";
+        std::wstring message;
+        message.reserve(bytes.size()*2);
+        for(unsigned char c:bytes)
+        {
+            message+=hex[c>>4];
+            message+=hex[c&15];
+        }
+        return SUCCEEDED(web->PostWebMessageAsString(message.c_str()));
+    }
+    bool create(HWND host,std::function<void(const std::wstring&)> receive,std::function<void()> failed)
+    {
+        wchar_t exe[MAX_PATH]{};
+        if(!GetModuleFileNameW(nullptr,exe,MAX_PATH)) return false;
+        const auto folder=std::filesystem::path(exe).parent_path();
+        loader=LoadLibraryExW((folder/L"WebView2Loader.dll").c_str(),nullptr,LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR|LOAD_LIBRARY_SEARCH_SYSTEM32);
+        if(!loader) return false;
+        using Create=HRESULT (STDAPICALLTYPE*)(PCWSTR,PCWSTR,ICoreWebView2EnvironmentOptions*,
+            ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler*);
+        const auto createEnvironment=reinterpret_cast<Create>(
+            reinterpret_cast<void*>(GetProcAddress(loader,"CreateCoreWebView2EnvironmentWithOptions")));
+        if(!createEnvironment) return false;
+        wchar_t local[MAX_PATH]{};
+        const auto length=GetEnvironmentVariableW(L"LOCALAPPDATA",local,MAX_PATH);
+        if(!length || length>=MAX_PATH) return false;
+        const auto profile=std::filesystem::path(local)/L"KSwitcher"/L"TerminalWebView";
+        const auto assets=folder/L"terminal";
+        auto environment=terminalCallback<ICoreWebView2CreateCoreWebView2EnvironmentCompletedHandler,
+            HRESULT,ICoreWebView2Environment*>([=,this](HRESULT hr,ICoreWebView2Environment *env)
+        {
+            if(!IsWindow(host)) return S_OK;
+            if(FAILED(hr) || !env) { failed(); return S_OK; }
+            auto completed=terminalCallback<ICoreWebView2CreateCoreWebView2ControllerCompletedHandler,
+                HRESULT,ICoreWebView2Controller*>([=,this](HRESULT result,ICoreWebView2Controller *view)
+            {
+                if(!IsWindow(host)) return S_OK;
+                if(FAILED(result) || !view) { failed(); return S_OK; }
+                controller=view;
+                view->get_CoreWebView2(&web);
+                Microsoft::WRL::ComPtr<ICoreWebView2_3> mapped;
+                if(!web || FAILED(web.As(&mapped)) || FAILED(mapped->SetVirtualHostNameToFolderMapping(
+                    L"kswitcher-terminal.invalid",assets.c_str(),COREWEBVIEW2_HOST_RESOURCE_ACCESS_KIND_DENY)))
+                { failed(); return S_OK; }
+                Microsoft::WRL::ComPtr<ICoreWebView2Settings> settings;
+                if(SUCCEEDED(web->get_Settings(&settings)))
+                {
+                    settings->put_AreDevToolsEnabled(FALSE);
+                    settings->put_AreDefaultContextMenusEnabled(FALSE);
+                    settings->put_AreHostObjectsAllowed(FALSE);
+                }
+                EventRegistrationToken token{};
+                auto navigation=terminalCallback<ICoreWebView2NavigationStartingEventHandler,
+                    ICoreWebView2*,ICoreWebView2NavigationStartingEventArgs*>([](auto*,auto *args)
+                {
+                    PWSTR uri{};
+                    if(SUCCEEDED(args->get_Uri(&uri)))
+                    {
+                        args->put_Cancel(wcscmp(uri,L"https://kswitcher-terminal.invalid/index.html")!=0);
+                        CoTaskMemFree(uri);
+                    }
+                    return S_OK;
+                });
+                auto newWindow=terminalCallback<ICoreWebView2NewWindowRequestedEventHandler,
+                    ICoreWebView2*,ICoreWebView2NewWindowRequestedEventArgs*>([](auto*,auto *args)
+                { args->put_Handled(TRUE); return S_OK; });
+                auto messages=terminalCallback<ICoreWebView2WebMessageReceivedEventHandler,
+                    ICoreWebView2*,ICoreWebView2WebMessageReceivedEventArgs*>([=,this](auto*,auto *args)
+                {
+                    PWSTR source{}, value{};
+                    if(SUCCEEDED(args->get_Source(&source)) &&
+                        wcscmp(source,L"https://kswitcher-terminal.invalid/index.html")==0 &&
+                        SUCCEEDED(args->TryGetWebMessageAsString(&value)))
+                    {
+                        if(wcscmp(value,L"ready")==0) ready=true;
+                        if(ready) receive(value);
+                    }
+                    CoTaskMemFree(value);
+                    CoTaskMemFree(source);
+                    return S_OK;
+                });
+                if(FAILED(web->add_NavigationStarting(navigation.Get(),&token)) ||
+                    FAILED(web->add_NewWindowRequested(newWindow.Get(),&token)) ||
+                    FAILED(web->add_WebMessageReceived(messages.Get(),&token)) ||
+                    FAILED(web->Navigate(L"https://kswitcher-terminal.invalid/index.html")))
+                    failed();
+                layout(host,visible,viewportHeight);
+                return S_OK;
+            });
+            if(FAILED(env->CreateCoreWebView2Controller(host,completed.Get()))) failed();
+            return S_OK;
+        });
+        return SUCCEEDED(createEnvironment(nullptr,profile.c_str(),nullptr,environment.Get()));
+    }
+};

src/lan.cpp

@@ -55,6 +55,11 @@ struct LanService::Impl
     Json trusted=Json::object(),positions=Json::object();
     std::unique_ptr<lan::Pairing> pending;
     std::unique_ptr<lan::ClipboardExchange> clipboard;
+    std::unique_ptr<lan::ClipboardExchange> transfers;
+    std::deque<lan::ClipboardExchange::Delivery> incomingFiles;
+    struct LogDownload {std::string peer, id; uint64_t deadline; Bytes bytes;};
+    std::optional<LogDownload> logDownload;
+    bool shareLogs{};
     bool enabled{};
     std::atomic<bool> stopping{false};
     std::mutex mutex;
@@ -83,6 +88,7 @@ struct LanService::Impl
             id=j.at("id"); enabled=j.value("enabled",false); trusted=j.at("trusted");
             positions=j.value("positions",Json::object());
             shareInput=j.value("shareInput",false);inputPeer=j.value("inputPeer","");inputEdge=j.value("inputEdge",1);
+            shareLogs=j.value("shareLogs",false);
             if(inputEdge<0||inputEdge>3||(shareInput&&trusted.empty()))throw std::runtime_error("Invalid input sharing configuration.");
             if(!trusted.is_object()||trusted.size()>64) throw std::runtime_error("Invalid paired computer list.");
             for(auto &[key,entry]:trusted.items())
@@ -93,12 +99,13 @@ struct LanService::Impl
         else id=lan::randomHex(16);
         lan::fillPositions(positions,trusted,inputPeer,inputEdge);
         clipboard=std::make_unique<lan::ClipboardExchange>(id);
+        transfers=std::make_unique<lan::ClipboardExchange>(id,"file-transfer");
         configureRouter();
         if(enabled) start();
     }
     ~Impl() { stop(); }
     void save() { atomicWrite(path,protect(encoded({{"version",1},{"id",id},{"enabled",enabled},{"trusted",trusted},
-        {"shareInput",shareInput},{"inputPeer",inputPeer},{"inputEdge",inputEdge},{"positions",positions}}))); }
+        {"shareInput",shareInput},{"shareLogs",shareLogs},{"inputPeer",inputPeer},{"inputEdge",inputEdge},{"positions",positions}}))); }
     bool queue(const std::string &peer,lan::InputFrame frame)
     {
         std::lock_guard lock(inputMutex);
@@ -153,6 +160,8 @@ struct LanService::Impl
         inputConnected=false;++inputEpoch;
         {std::lock_guard lock(inputMutex);inputOut.clear();inputIn.clear();inputReady.clear();}
         std::lock_guard lock(mutex); pending.reset(); peers.clear();clipboard=std::make_unique<lan::ClipboardExchange>(id);
+        transfers=std::make_unique<lan::ClipboardExchange>(id,"file-transfer");incomingFiles.clear();logDownload.reset();
+        if(inputWindow)PostMessageW(inputWindow,LanFilesChangedMessage,0,FALSE);
     }
     void send(SOCKET socket,const sockaddr_in &address,const Json &j)
     {
@@ -161,6 +170,41 @@ struct LanService::Impl
     }
     std::string heartbeat(const std::string &from,const std::string &to,const std::string &a,const std::string &b)
     { return "KSwitcher LAN v1|presence|"+from+"|"+to+"|"+a+"|"+b; }
+    void receiveTransfers(uint64_t now)
+    {
+        for(auto &item:transfers->deliveries)
+        {
+            if(item.app=="file")
+            {
+                auto end=std::find(item.bytes.begin(),item.bytes.end(),0);
+                if(end!=item.bytes.begin() && end!=item.bytes.end() && end-item.bytes.begin()<=1024 &&
+                   item.bytes.end()-end-1<=16*1024*1024)
+                {
+                    incomingFiles.push_back(std::move(item));
+                    if(inputWindow)PostMessageW(inputWindow,LanFilesChangedMessage,incomingFiles.size(),TRUE);
+                }
+            }
+            else if(item.app=="log-request" && item.bytes.size()==33)
+            {
+                std::string request(item.bytes.begin()+1,item.bytes.end());
+                if(!lan::identifier(request)||item.bytes[0]>1)continue;
+                Bytes response{2};
+                if(shareLogs)try
+                {
+                    auto log=readFile(path.parent_path()/(item.bytes[0]?L"kswitcher.log.1":L"kswitcher.log"),2*1024*1024);
+                    response[0]=0;
+                    response.insert(response.end(),log.begin(),log.end());
+                }
+                catch(const std::exception &){response={1};}
+                try{transfers->queue({item.peer},std::move(response),"log-reply-"+request,now);}
+                catch(const std::exception &){}
+            }
+            else if(logDownload && now<logDownload->deadline && logDownload->peer==item.peer &&
+                    item.app=="log-reply-"+logDownload->id && item.bytes.size()<=2*1024*1024+1 && logDownload->bytes.empty())
+                logDownload->bytes=std::move(item.bytes);
+        }
+        transfers->deliveries.clear();
+    }
     void receive(SOCKET socket,const sockaddr_in &address,const Json &j,uint64_t now)
     {
         if(j.value("app","")!="KSwitcher-LAN" || j.value("version",0)!=1) return;
@@ -180,6 +224,7 @@ struct LanService::Impl
             // announcements cannot extend its PeerLifetime expiry.
             if(peer.address.sin_addr.s_addr!=address.sin_addr.s_addr) peer.verified=0;
             clipboard->peerSession(other,j.value("clipboardSession",""));
+            transfers->peerSession(other,j.value("fileSession",""));
             peer.name=display; peer.epoch=session; peer.address=address; peer.seen=now;
             if(trusted.contains(other))
             {
@@ -192,6 +237,17 @@ struct LanService::Impl
         if(!peers.contains(other)||j.value("to","")!=id) return;
         auto &peer=peers.at(other);
         if(peer.address.sin_addr.s_addr!=address.sin_addr.s_addr) return;
+        if(type=="file-transfer" && trusted.contains(other))
+        {
+            size_t retainedBytes=0;
+            for(const auto &item:incomingFiles)retainedBytes+=item.bytes.size();
+            try {transfers->receive(other,trusted.at(other).at("key"),j,now,0,
+                [&](const auto &target,const auto &packet){send(socket,peers.at(target).address,packet);},
+                incomingFiles.size(),retainedBytes);}
+            catch(const std::exception &){return;}
+            receiveTransfers(now);
+            return;
+        }
         if(type=="clipboard" && trusted.contains(other))
         {
             try {clipboard->receive(other,trusted.at(other).at("key"),j,now,GetClipboardSequenceNumber(),
@@ -246,13 +302,17 @@ struct LanService::Impl
                     clipboard->poll(trusted,now,[&](const auto &target,const auto &packet){
                         if(peers.contains(target))send(socket,peers.at(target).address,packet);
                     });
-                    clipboardActive=clipboard->active();
+                    transfers->poll(trusted,now,[&](const auto &target,const auto &packet){
+                        if(peers.contains(target))send(socket,peers.at(target).address,packet);
+                    });
+                    clipboardActive=clipboard->active()||transfers->active();
                     if(shareInput)for(auto &[peer,entry]:trusted.items())
                         endpoints.push_back({peer,entry.at("key"),peers.contains(peer)?peers.at(peer).address.sin_addr.s_addr:0});
                     if(now>=nextHello)
                     {
                         epoch=lan::randomHex(16); // Fresh challenge prevents replayed presence from staying online.
                         auto hello=lan::envelope("hello",id); hello["name"]=name; hello["epoch"]=epoch;hello["clipboardSession"]=clipboard->session();
+                        hello["fileSession"]=transfers->session();
                         for(auto ip:broadcasts()) { auto address=bound; address.sin_addr.s_addr=ip; send(socket,address,hello); }
                         nextHello=now+3000;
                     }
@@ -324,6 +384,76 @@ struct LanService::Impl
             if(enabled) start(); else status="Disabled. No discovery sockets or worker thread.";
         }
         std::lock_guard lock(mutex);
+        auto now=GetTickCount64();
+        if(action=="shareLogs")
+        {
+            bool previous=shareLogs;
+            shareLogs=j.at("enabled");
+            try {save();} catch(...) {shareLogs=previous;throw;}
+            if(!shareLogs)
+                for(const auto &[peer,entry]:trusted.items())transfers->cancel(peer,"log-reply-");
+        }
+        if(action=="sendFile" || action=="requestLog")
+        {
+            auto peer=j.at("peer").get<std::string>();
+            if(!enabled||!trusted.contains(peer)||!peers.contains(peer)||!peers.at(peer).verified||
+               now-peers.at(peer).verified>=lan::PeerLifetime)
+                throw std::runtime_error("Select an online paired computer.");
+            if(!transfers->hasSession(peer))throw std::runtime_error("Update KSwitcher on the selected computer to use file transfers.");
+            if(action=="sendFile")
+            {
+                auto file=std::filesystem::path(wide(j.at("path").get<std::string>()));
+                auto name=utf8(file.filename().wstring());
+                if(name.empty()||name.size()>1024)throw std::runtime_error("Invalid file name.");
+                Bytes payload(name.begin(),name.end());
+                payload.push_back(0);
+                constexpr size_t fileLimit=16*1024*1024;
+                if(std::filesystem::file_size(file)>fileLimit)throw std::runtime_error("File size limit is 16 MiB.");
+                auto bytes=readFile(file,fileLimit);
+                payload.insert(payload.end(),bytes.begin(),bytes.end());
+                transfers->queue({peer},std::move(payload),"file",now);
+                return encoded({{"queued",true}});
+            }
+            if(logDownload && now<logDownload->deadline)
+                throw std::runtime_error("A remote log download is already pending.");
+            auto request=lan::randomHex(16);
+            Bytes payload{static_cast<unsigned char>(j.value("previous",false))};
+            payload.insert(payload.end(),request.begin(),request.end());
+            transfers->queue({peer},std::move(payload),"log-request",now);
+            logDownload=LogDownload{peer,request,now+30000,{}};
+            return encoded({{"request",request}});
+        }
+        if(action=="takeLog")
+        {
+            if(!logDownload||logDownload->id!=j.at("request").get<std::string>()||now>=logDownload->deadline)
+                return encoded({{"state","expired"}});
+            if(logDownload->bytes.empty())return encoded({{"state","waiting"}});
+            auto bytes=std::move(logDownload->bytes);
+            logDownload.reset();
+            if(bytes.front()!=0)return encoded({{"state",bytes.front()==2?"denied":"unavailable"}});
+            std::string hex;
+            hex.reserve((bytes.size()-1)*2);
+            for(auto it=bytes.begin()+1;it!=bytes.end();++it)
+            {
+                hex+="0123456789abcdef"[*it>>4];
+                hex+="0123456789abcdef"[*it&15];
+            }
+            return encoded({{"state","ready"},{"logHex",hex}});
+        }
+        if(action=="saveFile"||action=="discardFile")
+        {
+            auto found=std::find_if(incomingFiles.begin(),incomingFiles.end(),[&](const auto &file){
+                return file.id==j.at("id").get<std::string>() && file.peer==j.at("peer").get<std::string>();
+            });
+            if(found==incomingFiles.end())throw std::runtime_error("This file is no longer available.");
+            if(action=="saveFile")
+            {
+                auto start=std::find(found->bytes.begin(),found->bytes.end(),0)+1;
+                atomicWrite(wide(j.at("path").get<std::string>()),Bytes(start,found->bytes.end()));
+            }
+            incomingFiles.erase(found);
+            if(inputWindow)PostMessageW(inputWindow,LanFilesChangedMessage,incomingFiles.size(),FALSE);
+        }
         if(action=="position")
         {
             auto peer=j.at("peer").get<std::string>();int x=j.at("x"),y=j.at("y");
@@ -368,6 +498,9 @@ struct LanService::Impl
             auto peer=j.at("peer").get<std::string>();auto oldTrusted=trusted;auto oldPositions=positions;bool oldSharing=shareInput;
             trusted.erase(peer);positions.erase(peer);if(trusted.empty())shareInput=false;
             try{save();}catch(...){trusted=std::move(oldTrusted);positions=std::move(oldPositions);shareInput=oldSharing;throw;}
+            std::erase_if(incomingFiles,[&](const auto &file){return file.peer==peer;});
+            if(inputWindow)PostMessageW(inputWindow,LanFilesChangedMessage,incomingFiles.size(),FALSE);
+            if(logDownload && logDownload->peer==peer)logDownload.reset();
             if(pending&&pending->peer==peer)pending.reset();
             configureRouter();
             status="Pair removed on this computer.";
@@ -376,7 +509,16 @@ struct LanService::Impl
             {"positions",positions},{"shareInput",shareInput},{"inputPeer",inputPeer},{"controlPeer",router?router->peer():std::string{}},{"inputEdge",inputEdge},{"inputConnected",inputConnected.load()},
             {"inputStatus",enabled&&shareInput?inputStatus:"Input sharing disabled."},{"inputNeedsHelp",enabled&&shareInput&&inputNeedsHelp},{"controlMode",router?int(router->mode()):0}};
         {std::lock_guard inputLock(inputMutex);result["inputReady"]=inputReady;}
-        auto now=GetTickCount64();
+        result["shareLogs"]=shareLogs;
+        result["files"]=Json::array();
+        result["transferStatus"]=transfers->status;
+        for(const auto &file:incomingFiles)
+        {
+            auto end=std::find(file.bytes.begin(),file.bytes.end(),0);
+            auto filename=utf8(wide(std::string(file.bytes.begin(),end)));
+            result["files"].push_back({{"id",file.id},{"peer",file.peer},{"sender",trusted.at(file.peer).at("name")},
+                {"name",filename},{"size",file.bytes.end()-end-1}});
+        }
         result["pendingPeer"]=pending&&!pending->confirmed ? pending->peer : "";
         result["pairSecondsRemaining"]=pending&&!pending->confirmed&&!pending->expired(now)
             ? (lan::PairLifetime-(now-pending->started)+999)/1000 : 0;
@@ -384,7 +526,8 @@ struct LanService::Impl
         {
             char ip[INET_ADDRSTRLEN]{}; InetNtopA(AF_INET,(void*)&p.address.sin_addr,ip,sizeof(ip));
             result["peers"].push_back({{"id",peer},{"name",p.name},{"address",ip},{"paired",trusted.contains(peer)},
-                {"verified",p.verified && now-p.verified<lan::PeerLifetime},{"online",true}});
+                {"verified",p.verified && now-p.verified<lan::PeerLifetime},{"online",true},
+                {"fileTransfer",transfers->hasSession(peer)}});
         }
         for(const auto &[peer,p]:trusted.items()) if(!peers.contains(peer))
             result["peers"].push_back({{"id",peer},{"name",p.at("name")},{"address",""},{"paired",true},{"verified",false},{"online",false}});

src/lan.h

@@ -5,6 +5,7 @@
 namespace ks
 {
 inline constexpr UINT LanInputReadyMessage=WM_APP+67, LanClipboardReadyMessage=WM_APP+68, LanClipboardPublishMessage=WM_APP+69;
+inline constexpr UINT LanFilesChangedMessage=WM_APP+70;
 struct LanClipboard {std::string peer,name,app;Bytes data;DWORD sequence{};};
 // Discovery, pairing and optional encrypted input within the resident process.
 class LanService

src/lan_clipboard.h

@@ -6,8 +6,8 @@
 
 namespace ks::lan
 {
-// Reliable bounded clipboard messages over the existing discovery socket.
-// Every datagram has a fresh directional AES-GCM key; no plaintext clipboard
+// Reliable bounded messages over the existing discovery socket.
+// Every datagram has a fresh directional AES-GCM key; no plaintext transfer
 // metadata or contents appear outside the encrypted CBOR body.
 class ClipboardExchange
 {
@@ -15,7 +15,7 @@ class ClipboardExchange
     struct Item {std::string id,app;Bytes bytes;};
     struct Sending {std::deque<std::shared_ptr<Item>> queue;size_t ack{};bool begun{};uint64_t last{},progress{};};
     struct Receiving {std::string id,app;Bytes bytes;size_t size{};uint64_t last{};DWORD sequence{};};
-    std::string local, boot=randomHex(16);
+    std::string local, type, domain, boot=randomHex(16);
     std::map<std::string,std::string> sessions;
     std::map<std::string,Sending> sending;
     std::map<std::string,Receiving> receiving;
@@ -31,33 +31,53 @@ class ClipboardExchange
     Json seal(const std::string &peer,const std::string &key,const Json &body)
     {
         auto nonce=randomHex(16);auto number=++nextPacket;
-        InputCipher cipher(mac(key,"KSwitcher clipboard v1|"+local+"|"+peer+"|"+boot+"|"+sessions.at(peer)+"|"+std::to_string(number)+"|"+nonce));
-        auto packet=envelope("clipboard",local);packet["to"]=peer;packet["nonce"]=nonce;packet["session"]=sessions.at(peer);packet["fromSession"]=boot;packet["number"]=number;
+        InputCipher cipher(mac(key,domain+local+"|"+peer+"|"+boot+"|"+sessions.at(peer)+"|"+std::to_string(number)+"|"+nonce));
+        auto packet=envelope(type,local);packet["to"]=peer;packet["nonce"]=nonce;packet["session"]=sessions.at(peer);packet["fromSession"]=boot;packet["number"]=number;
         packet["data"]=hex(cipher.encryptPayload(Json::to_cbor(body)));return packet;
     }
   public:
     struct Delivery {std::string peer,id,app;Bytes bytes;DWORD sequence{};};
     std::vector<Delivery> deliveries;
     std::string status="Clipboard sharing ready.";
-    explicit ClipboardExchange(std::string id):local(std::move(id)){}
+    explicit ClipboardExchange(std::string id,std::string messageType="clipboard")
+        :local(std::move(id)),type(std::move(messageType)),domain("KSwitcher "+type+" v1|")
+    {
+        if(type!="clipboard")status.clear();
+    }
     const std::string &session()const{return boot;}
     bool active()const{return !sending.empty();}
+    bool hasSession(const std::string &peer)const{return sessions.contains(peer);}
+    void cancel(const std::string &peer,const std::string &prefix)
+    {
+        auto found=sending.find(peer);
+        if(found==sending.end())return;
+        auto &s=found->second;
+        if(s.queue.empty())return;
+        bool reset=s.queue.front()->app.starts_with(prefix);
+        std::erase_if(s.queue,[&](const auto &item){return item->app.starts_with(prefix);});
+        if(reset){s.ack=0;s.begun=false;s.last=0;s.progress=GetTickCount64();}
+    }
     void peerSession(const std::string &peer,const std::string &value){
         if(!identifier(value))return;
         if(sessions.contains(peer)&&sessions.at(peer)!=value){
             auto found=sending.find(peer);if(found!=sending.end()){found->second.ack=0;found->second.begun=false;found->second.last=0;}
+            if(type!="clipboard"){
+                auto previous=receiving.find(peer);
+                if(previous!=receiving.end()){incomingBytes-=previous->second.size;receiving.erase(previous);}
+                receivedPackets.erase(peer);
+            }
         }
         sessions[peer]=value;
     }
     void queue(const std::vector<std::string> &peers,Bytes bytes,std::string app,uint64_t now)
     {
-        if(bytes.empty()||bytes.size()>Limit)throw std::runtime_error("LAN clipboard limit is 32 MiB.");
+        if(bytes.empty()||bytes.size()>Limit)throw std::runtime_error("LAN transfer limit is 32 MiB.");
         size_t total=bytes.size();std::set<const Item*> counted;
         for(auto &[peer,s]:sending)for(auto &item:s.queue)if(counted.insert(item.get()).second)total+=item->bytes.size();
         if(total>2*Limit)throw std::runtime_error("LAN clipboard queue is full.");
         auto item=std::make_shared<Item>(Item{randomHex(16),app.size()>128?std::string("Application"):app,std::move(bytes)});
-        for(auto &peer:peers){auto &s=sending[peer];if(s.queue.size()>=8)continue;if(s.queue.empty()){s.ack=0;s.begun=false;s.last=0;s.progress=now;}s.queue.push_back(item);}
-        if(!peers.empty())status="Sending clipboard to "+std::to_string(peers.size())+" paired computers...";
+        for(auto &peer:peers){auto &s=sending[peer];if(s.queue.size()>=8){if(type!="clipboard")throw std::runtime_error("LAN transfer queue is full.");continue;}if(s.queue.empty()){s.ack=0;s.begun=false;s.last=0;s.progress=now;}s.queue.push_back(item);}
+        if(!peers.empty())status=type=="clipboard"?"Sending clipboard to "+std::to_string(peers.size())+" paired computers...":"Sending…";
     }
     template<class Send>void poll(const Json &trusted,uint64_t now,Send send)
     {
@@ -67,7 +87,7 @@ class ClipboardExchange
         {
             auto &peer=it->first;auto &s=it->second;
             if(!trusted.contains(peer)||s.queue.empty()){it=sending.erase(it);continue;}
-            if(now-s.progress>30000){status="Clipboard transfer timed out.";it=sending.erase(it);continue;}
+            if(now-s.progress>30000){status="Transfer timed out.";it=sending.erase(it);continue;}
             if(sessions.contains(peer)&&(!s.last||now-s.last>=100))
             {
                 auto &item=*s.queue.front();auto key=trusted.at(peer).at("key").template get<std::string>();
@@ -80,14 +100,16 @@ class ClipboardExchange
             ++it;
         }
     }
-    template<class Send>void receive(const std::string &peer,const std::string &key,const Json &packet,uint64_t now,DWORD sequence,Send send)
+    template<class Send>void receive(const std::string &peer,const std::string &key,const Json &packet,uint64_t now,DWORD sequence,Send send,
+        size_t retained=0,size_t retainedBytes=0)
     {
         if(packet.value("session","")!=boot||!sessions.contains(peer)||packet.value("to","")!=local||!identifier(packet.value("nonce","")))return;
         auto senderBoot=packet.value("fromSession","");auto number=packet.value("number",uint64_t{});
         if(!identifier(senderBoot)||!number)return;
+        if(type!="clipboard"&&senderBoot!=sessions.at(peer))return;
         auto &seen=receivedPackets[peer];
         if((seen.contains(senderBoot)&&number<=seen.at(senderBoot))||(!seen.contains(senderBoot)&&seen.size()>=1024))return;
-        InputCipher cipher(mac(key,"KSwitcher clipboard v1|"+peer+"|"+local+"|"+senderBoot+"|"+boot+"|"+std::to_string(number)+"|"+packet.at("nonce").get<std::string>()));
+        InputCipher cipher(mac(key,domain+peer+"|"+local+"|"+senderBoot+"|"+boot+"|"+std::to_string(number)+"|"+packet.at("nonce").get<std::string>()));
         auto body=Json::from_cbor(cipher.decryptPayload(unhex(packet.at("data").get<std::string>())));
         seen[senderBoot]=number; // Retransmissions use new numbers; reordered old packets are retried.
         auto id=body.value("item","");if(!identifier(id))return;
@@ -100,7 +122,7 @@ class ClipboardExchange
             if(item.id!=id||offset>item.bytes.size()||offset<s.ack||offset>s.ack+Window*Chunk||(offset!=item.bytes.size()&&offset%Chunk))return;
             if(offset==s.ack&&s.begun)return;
             s.begun=true;s.ack=offset;s.progress=now;s.last=0;
-            if(offset==item.bytes.size()){s.queue.pop_front();s.ack=0;s.begun=false;status="Clipboard delivered.";}
+            if(offset==item.bytes.size()){s.queue.pop_front();s.ack=0;s.begun=false;status=type=="clipboard"?"Clipboard delivered.":"Transfer delivered.";}
             return;
         }
         for(auto &done:completed[peer])if(done.first==id){ack(done.second);return;}
@@ -111,7 +133,8 @@ class ClipboardExchange
             auto found=receiving.find(peer);
             if(found!=receiving.end()){if(found->second.id==id)ack(found->second.bytes.size());return;}
             size_t waiting=0;for(auto &d:deliveries)waiting+=d.bytes.size();
-            if(incomingBytes+waiting+size>2*Limit||deliveries.size()>=8)return;
+            if(incomingBytes+waiting+retainedBytes+size>2*Limit||deliveries.size()+retained>=8||
+               (type!="clipboard"&&receiving.size()+retained>=8))return;
             receiving.emplace(peer,Receiving{id,app,{},size,now,sequence});incomingBytes+=size;ack(0);return;
         }
         if(op!="chunk")return;
@@ -126,7 +149,7 @@ class ClipboardExchange
         {
             deliveries.push_back({peer,r.id,r.app,std::move(r.bytes),r.sequence});
             auto &done=completed[peer];done.push_back({id,r.size});if(done.size()>64)done.pop_front();
-            incomingBytes-=r.size;receiving.erase(found);status="Clipboard received.";
+            incomingBytes-=r.size;receiving.erase(found);status=type=="clipboard"?"Clipboard received.":"Transfer received.";
         }
     }
 };

src/lan_log.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "core.h"
+
+namespace ks
+{
+inline Bytes decodeLanLog(const std::string &hex)
+{
+    auto digit = [](char value) -> unsigned
+    {
+        if (value >= '0' && value <= '9') return value - '0';
+        if (value >= 'a' && value <= 'f') return value - 'a' + 10;
+        throw std::runtime_error("Invalid diagnostic log response.");
+    };
+    if (hex.size() % 2) throw std::runtime_error("Invalid diagnostic log response.");
+    Bytes bytes;
+    bytes.reserve(hex.size() / 2);
+    for (size_t i = 0; i < hex.size(); i += 2)
+        bytes.push_back(static_cast<unsigned char>(digit(hex[i]) * 16 + digit(hex[i + 1])));
+    return bytes;
+}
+}

src/mcp_logs.h

@@ -0,0 +1,113 @@
+#pragma once
+
+#include "../vendor/json.hpp"
+#include "lan_log.h"
+#include <iostream>
+
+namespace ks
+{
+inline int runLogMcp(const std::function<Bytes(const Bytes &)> &lan)
+{
+    using Json = nlohmann::json;
+    auto command = [&](const Json &request)
+    {
+        auto text = request.dump();
+        return Json::parse(lan(Bytes(text.begin(), text.end())));
+    };
+    const Json tools = Json::parse(R"({"tools":[
+        {"name":"list_log_computers","description":"List paired computers that support remote log downloads.","inputSchema":{"type":"object","properties":{}},"annotations":{"readOnlyHint":true}},
+        {"name":"read_diagnostic_log","description":"Read KSwitcher diagnostic log lines. Omit peer for the local computer. Use offset to page backward from the newest line.","inputSchema":{"type":"object","properties":{"peer":{"type":"string"},"previous":{"type":"boolean"},"lines":{"type":"integer","minimum":1,"maximum":500,"default":100},"offset":{"type":"integer","minimum":0,"default":0}}},"annotations":{"readOnlyHint":true}}
+    ]})");
+    std::string line;
+    while (std::getline(std::cin, line))
+    {
+        Json id, reply;
+        try
+        {
+            auto message = Json::parse(line);
+            if (!message.contains("id")) continue;
+            id = message.at("id");
+            auto method = message.at("method").get<std::string>();
+            if (method == "initialize")
+            {
+                auto version = message.at("params").value("protocolVersion", "");
+                if (version != "2025-03-26" && version != "2025-06-18" && version != "2025-11-25")
+                    version = "2025-11-25";
+                reply["result"] = {{"protocolVersion", version}, {"capabilities", {{"tools", Json::object()}}},
+                    {"serverInfo", {{"name", "kswitcher-logs"}, {"version", "1.0.0"}}}};
+            }
+            else if (method == "ping") reply["result"] = Json::object();
+            else if (method == "tools/list") reply["result"] = tools;
+            else if (method == "tools/call")
+            {
+                std::string output;
+                bool failed = false;
+                try
+                {
+                    auto params = message.at("params");
+                    auto arguments = params.value("arguments", Json::object());
+                    auto name = params.at("name").get<std::string>();
+                    if (name == "list_log_computers")
+                    {
+                        auto peers = Json::array();
+                        for (const auto &peer : command({{"action", "status"}}).at("peers").get<Json::array_t>())
+                            if (peer.value("paired", false))
+                                peers.push_back({{"id", peer.at("id")}, {"name", peer.at("name")},
+                                    {"available", peer.value("verified", false) && peer.value("fileTransfer", false)}});
+                        output = peers.dump();
+                    }
+                    else if (name == "read_diagnostic_log")
+                    {
+                        auto peer = arguments.value("peer", "");
+                        bool previous = arguments.value("previous", false);
+                        int lines = arguments.value("lines", 100);
+                        if (lines < 1 || lines > 500) throw std::runtime_error("lines must be between 1 and 500.");
+                        int offset = arguments.value("offset", 0);
+                        if (offset < 0) throw std::runtime_error("offset must be nonnegative.");
+                        if (peer.empty()) output = utf8(readDiagnosticLog(previous));
+                        else
+                        {
+                            auto request = command({{"action", "requestLog"}, {"peer", peer}, {"previous", previous}}).at("request");
+                            for (;;)
+                            {
+                                auto result = command({{"action", "takeLog"}, {"request", request}});
+                                auto state = result.at("state").get<std::string>();
+                                if (state == "ready")
+                                {
+                                    auto bytes = decodeLanLog(result.at("logHex"));
+                                    output.assign(bytes.begin(), bytes.end());
+                                    break;
+                                }
+                                if (state == "denied") throw std::runtime_error("Remote log downloads are disabled on that computer.");
+                                if (state == "unavailable") throw std::runtime_error("The remote log is unavailable.");
+                                if (state != "waiting") throw std::runtime_error("The remote log download timed out.");
+                                Sleep(250);
+                            }
+                        }
+                        auto previousLine = [&](size_t end)
+                        {
+                            if (!end) return size_t{};
+                            if (output[end - 1] == '\n') --end;
+                            return end ? output.rfind('\n', end - 1) + 1 : size_t{};
+                        };
+                        size_t end = output.size();
+                        while (offset-- > 0 && end) end = previousLine(end);
+                        size_t start = end;
+                        while (lines-- > 0 && start) start = previousLine(start);
+                        output = output.substr(start, end - start);
+                    }
+                    else throw std::runtime_error("Unknown tool.");
+                }
+                catch (const std::exception &error) { output = error.what(); failed = true; }
+                reply["result"] = {{"content", Json::array({{{"type", "text"}, {"text", output}}})}, {"isError", failed}};
+            }
+            else reply["error"] = {{"code", -32601}, {"message", "Method not found"}};
+        }
+        catch (const std::exception &) { reply["error"] = {{"code", -32600}, {"message", "Invalid request"}}; }
+        reply["jsonrpc"] = "2.0";
+        reply["id"] = id;
+        std::cout << reply.dump(-1, ' ', false, Json::error_handler_t::replace) << std::endl;
+    }
+    return 0;
+}
+}

src/paste_probe.h

@@ -90,15 +90,22 @@ class PasteProbe
             return {};
         }
         IUIAutomationElement *focused{};
-        BOOL same = FALSE;
-        if (SUCCEEDED(automation->GetFocusedElement(&focused)) && focused)
+        if (FAILED(automation->GetFocusedElement(&focused)) || !focused)
         {
-            automation->CompareElements(element, focused, &same);
+            if (focused) focused->Release();
+            status = L"accessibility-focus-unavailable";
+            return {};
+        }
+        BOOL same = FALSE;
+        if (FAILED(automation->CompareElements(element, focused, &same)))
+        {
+            focused->Release();
+            status = L"accessibility-focus-comparison-failed";
+            return {};
         }
         if (!same)
         {
-            if (focused)
-                focused->Release();
+            focused->Release();
             status = L"focused-control-changed";
             return {};
         }

src/platform.cpp

@@ -816,6 +816,13 @@ void diagnosticOperation(const std::string &json)
     auto record = nlohmann::json::parse(json);
     if (!record.value("problem", true))
     {
+        if (record.value("elapsedMs", 0ULL) >= 2000 && record.value("outcome", "") == "Paste verified")
+        {
+            auto summary = record;
+            for (auto field : {"original", "expected", "actual", "selectionExpected"})
+                summary.erase(field);
+            log(L"Operation " + wide(summary.dump(-1, ' ', true, nlohmann::json::error_handler_t::replace)));
+        }
         // Keep successful operations only in the bounded, short-lived context.
         // They are persisted with a subsequent failure, never as standalone rows.
         diagnosticBuffer.record(L"Completed operation " + wide(record.dump(-1, ' ', true,

src/screenshot.cpp

@@ -180,6 +180,7 @@ struct Capture
     LineStyle lineStyle=LineStyle::Solid;
     int smoothing=25;
     bool smoothingDrag=false;
+    bool smoothingPreferenceDirty=false;
     LineEnds arrowEnds=LineEnds::End, freehandEnds=LineEnds::None;
     COLORREF currentColor=RGB(225,42,50);
     COLORREF customColors[16]{};
@@ -221,8 +222,24 @@ struct Capture
     MarkPart hoveredPart=MarkPart::None;
     std::wstring statusText;
     std::filesystem::path savedPath;
-    explicit Capture(ScreenshotHost &a) : app(a), autoOpenEditor(a.autoOpenEditor) {}
+    explicit Capture(ScreenshotHost &a) : app(a), autoOpenEditor(a.autoOpenEditor)
+    {
+        if(a.smoothingPreference.empty()) return;
+        try {
+            auto stored=readFile(a.smoothingPreference,1);
+            if(stored.size()==1 && stored.front()<=100) smoothing=stored.front();
+        } catch(const std::exception &) {} // Missing or unreadable preference uses the default.
+    }
+    void saveSmoothingPreference()
+    {
+        if(!smoothingPreferenceDirty || app.smoothingPreference.empty()) return;
+        try {
+            atomicWrite(app.smoothingPreference,Bytes{static_cast<unsigned char>(smoothing)});
+            smoothingPreferenceDirty=false;
+        } catch(const std::exception &) {} // A failed preference write must not interrupt editing.
+    }
     ~Capture() {
+        saveSmoothingPreference();
         if(pencilCursor) DestroyCursor(pencilCursor);
         for(auto cursor:drawingCursors) if(cursor) DestroyCursor(cursor);
         if (font) DeleteObject(font);
@@ -1170,8 +1187,14 @@ LRESULT CALLBACK captureProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
                     setScreenshotSmoothing(c->marks[c->selected],amount);
                     resolveScreenshotLinks(c->marks);
                     c->smoothingDrag=LOWORD(wp)==TB_THUMBTRACK;
-                } else if(!pencil) c->smoothing=amount;
-                if(LOWORD(wp)!=TB_THUMBTRACK) c->smoothingDrag=false;
+                } else if(!pencil && c->smoothing!=amount) {
+                    c->smoothing=amount;
+                    c->smoothingPreferenceDirty=true;
+                }
+                if(LOWORD(wp)!=TB_THUMBTRACK) {
+                    c->smoothingDrag=false;
+                    c->saveSmoothingPreference();
+                }
                 syncLineOptions(w,*c); InvalidateRect(w,nullptr,FALSE);
                 return 0;
             }
@@ -1185,7 +1208,11 @@ LRESULT CALLBACK captureProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
             if (c->dragging) return 0;
             if(LOWORD(wp)==44) {
                 int amount=int(SendDlgItemMessageW(w,41,TBM_GETPOS,0,0));
-                c->smoothing=amount;
+                if(c->smoothing!=amount) {
+                    c->smoothing=amount;
+                    c->smoothingPreferenceDirty=true;
+                }
+                c->saveSmoothingPreference();
                 if(std::any_of(c->marks.begin(),c->marks.end(),[&](const Mark &m){return m.freehand && m.smoothing!=amount;})) {
                     c->remember(c->marks);
                     for(auto &mark:c->marks) if(mark.freehand) setScreenshotSmoothing(mark,amount);

src/screenshot.h

@@ -9,6 +9,7 @@ struct ScreenshotHost {
     unsigned windows{};
     bool (*notify)(const Clip &){};
     bool autoOpenEditor = false;
+    std::filesystem::path smoothingPreference;
 };
 inline constexpr UINT ScreenshotRequest=WM_APP+71, ScreenshotIdle=WM_APP+72;
 void showScreenshot(ScreenshotHost &);

src/screenshot_main.cpp

@@ -110,6 +110,8 @@ int WINAPI wWinMain(HINSTANCE instance,HINSTANCE,PWSTR,int)
     InitCommonControlsEx(&controls);
     ks::ScreenshotHost host{instance};
     host.notify=ks::notifyScreenshot;
+    try { host.smoothingPreference=ks::dataDirectory()/L"screenshot-smoothing"; }
+    catch(const std::exception &) {} // The editor can still run without local preferences.
     WNDCLASSW cls{}; cls.hInstance=instance; cls.lpfnWndProc=controller; cls.lpszClassName=ControllerClass;
     RegisterClassW(&cls);
     host.window=CreateWindowW(ControllerClass,L"KSwitcher Screenshot",0,0,0,0,0,nullptr,nullptr,instance,&host);

src/storage.cpp

@@ -253,10 +253,12 @@ void validateSettings(const Settings &s)
                               L"абвгдеёжзийклмнопрстуфхцчшщъыьэюя"})
             valid |= !from.empty() && !to.empty() && from.size() <= 32 && to.size() <= 32 &&
                      from == lower(from) && to == lower(to) && from != to &&
-                     from.find_first_not_of(alphabet) == from.npos &&
+                     validAutoReplacementSource(from, alphabet) &&
                      validAutoCorrection(to, alphabet);
         if (!valid)
-            throw std::runtime_error("Use a lowercase typo of 1-32 letters and a different correction of 1-32 characters in the same language. Single spaces between words and apostrophes between letters are allowed.");
+            throw std::runtime_error("Invalid replacement: " + utf8(from.substr(0, 32)) + "=" +
+                utf8(to.substr(0, 32)) + "\n\nUse one lowercase word of 1-32 characters. The typo may include "
+                "digits and internal apostrophes. Use a different correction of 1-32 characters in the same language.");
     }
     for (const auto &[language, words] : s.autoWords)
     {

src/ui.cpp

@@ -1,6 +1,7 @@
 #include "lan_layout.h"
 #include "../resources/resource.h"
 #include "app.h"
+#include "lan_log.h"
 #include "history_preview.h"
 #include "ui_scroll.h"
 #include "configuration.h"
@@ -270,6 +271,53 @@ LRESULT CALLBACK layoutProc(HWND w, UINT msg, WPARAM wp, LPARAM lp, UINT_PTR, DW
     }
     return DefSubclassProc(w, msg, wp, lp);
 }
+LRESULT CALLBACK listHeaderDraw(HWND list, UINT message, WPARAM wp, LPARAM lp, UINT_PTR, DWORD_PTR)
+{
+    if (message != WM_NOTIFY) return DefSubclassProc(list, message, wp, lp);
+    const auto *notice = reinterpret_cast<const NMHDR *>(lp);
+    auto header = ListView_GetHeader(list);
+    if (notice->hwndFrom != header || notice->code != NM_CUSTOMDRAW)
+        return DefSubclassProc(list, message, wp, lp);
+    const auto &draw = *reinterpret_cast<const NMCUSTOMDRAW *>(lp);
+    auto background = GetSysColorBrush(COLOR_3DFACE);
+    auto border = GetSysColorBrush(COLOR_3DSHADOW);
+    if (draw.dwDrawStage == CDDS_PREPAINT)
+    {
+        FillRect(draw.hdc, &draw.rc, background);
+        return CDRF_NOTIFYITEMDRAW | CDRF_NOTIFYPOSTPAINT;
+    }
+    if (draw.dwDrawStage == CDDS_ITEMPREPAINT)
+    {
+        RECT cell = draw.rc;
+        FillRect(draw.hdc, &cell, background);
+        RECT divider{cell.right - 1, cell.top, cell.right, cell.bottom};
+        FillRect(draw.hdc, &divider, border);
+        wchar_t title[64]{};
+        HDITEMW item{HDI_TEXT | HDI_FORMAT};
+        item.pszText = title;
+        item.cchTextMax = std::size(title);
+        Header_GetItem(header, static_cast<int>(draw.dwItemSpec), &item);
+        cell.left += scale(list, 5);
+        cell.right -= scale(list, 5);
+        int dc = SaveDC(draw.hdc);
+        auto font = SendMessageW(header, WM_GETFONT, 0, 0);
+        if (font) SelectObject(draw.hdc, reinterpret_cast<HFONT>(font));
+        SetTextColor(draw.hdc, GetSysColor(COLOR_BTNTEXT));
+        SetBkMode(draw.hdc, TRANSPARENT);
+        UINT alignment = (item.fmt & HDF_RIGHT) ? DT_RIGHT : (item.fmt & HDF_CENTER) ? DT_CENTER : DT_LEFT;
+        DrawTextW(draw.hdc, title, -1, &cell, alignment | DT_SINGLELINE | DT_VCENTER | DT_END_ELLIPSIS | DT_NOPREFIX);
+        RestoreDC(draw.hdc, dc);
+        return CDRF_SKIPDEFAULT;
+    }
+    if (draw.dwDrawStage == CDDS_POSTPAINT)
+    {
+        RECT line{};
+        GetClientRect(header, &line);
+        line.top = line.bottom - 1;
+        FillRect(draw.hdc, &line, border);
+    }
+    return CDRF_DODEFAULT;
+}
 HWND control(HWND parent, const wchar_t *cls, const wchar_t *title, DWORD style, int id, int x, int y,
              int width, int height)
 {
@@ -278,6 +326,8 @@ HWND control(HWND parent, const wchar_t *cls, const wchar_t *title, DWORD style,
                              scale(parent, width), scale(parent, height), parent, (HMENU)(INT_PTR)id,
                              GetModuleHandleW(nullptr), nullptr);
     SendMessageW(w, WM_SETFONT, (WPARAM)GetPropW(parent, L"Font"), TRUE);
+    if (wcscmp(cls, WC_LISTVIEWW) == 0 && (style & LVS_TYPEMASK) == LVS_REPORT && !(style & LVS_NOCOLUMNHEADER))
+        SetWindowSubclass(w, listHeaderDraw, 3, 0);
     if(wcscmp(cls,L"LISTBOX")==0 || wcscmp(cls,WC_LISTVIEWW)==0 ||
        wcscmp(cls,L"COMBOBOX")==0 || (wcscmp(cls,L"EDIT")==0 && (style&ES_MULTILINE)))
         enableWheelBatching(w,wcscmp(cls,L"LISTBOX")==0);
@@ -1127,6 +1177,8 @@ struct ChatLanguagesView
     Settings draft;
     int selection = -1;
     bool dirty{};
+    bool updatingList{};
+    std::wstring search;
 };
 void collectChatLanguages(HWND w, ChatLanguagesView *v)
 {
@@ -1141,9 +1193,17 @@ void collectChatLanguages(HWND w, ChatLanguagesView *v)
 }
 void fillChatLanguages(HWND w, ChatLanguagesView *v)
 {
-    int index = (int)SendDlgItemMessageW(w, 710, LB_GETCURSEL, 0, 0);
-    if (index < 0 || index >= (int)v->keys.size()) return;
-    v->selection = index;
+    int index = v->selection;
+    EnableWindow(GetDlgItem(w, 711), index >= 0);
+    EnableWindow(GetDlgItem(w, IDOK), index >= 0);
+    if (index < 0)
+    {
+        SendDlgItemMessageW(w, 711, LB_SETSEL, FALSE, -1);
+        EnableWindow(GetDlgItem(w, 713), FALSE);
+        value(w, 712, v->keys.empty() ? L"Open a chat, then reopen this dialog to add it." :
+            L"No contacts match your search.");
+        return;
+    }
     const auto &draft = v->draft;
     auto saved = draft.chatCycles.find(v->keys[index]);
     const auto &cycle = saved == draft.chatCycles.end() ? draft.cycle : saved->second;
@@ -1157,26 +1217,103 @@ void fillChatLanguages(HWND w, ChatLanguagesView *v)
         L"Chat profile. Select languages, or remove it to use the defaults.");
     EnableWindow(GetDlgItem(w, 713), saved != draft.chatCycles.end());
 }
+void selectChatRow(HWND list, int index)
+{
+    int row = -1;
+    if (index >= 0)
+    {
+        LVFINDINFOW find{LVFI_PARAM};
+        find.lParam = index;
+        row = ListView_FindItem(list, -1, &find);
+    }
+    ListView_SetItemState(list, -1, 0, LVIS_SELECTED | LVIS_FOCUSED);
+    if (row >= 0)
+    {
+        ListView_SetItemState(list, row, LVIS_SELECTED | LVIS_FOCUSED, LVIS_SELECTED | LVIS_FOCUSED);
+        ListView_EnsureVisible(list, row, FALSE);
+    }
+}
+void filterChatRows(HWND w, ChatLanguagesView *v)
+{
+    auto list = GetDlgItem(w, 710);
+    auto search = lower(v->search);
+    int selection = -1;
+    v->updatingList = true;
+    SendMessageW(list, WM_SETREDRAW, FALSE, 0);
+    ListView_DeleteAllItems(list);
+    for (size_t i = 0; i < v->keys.size(); ++i)
+    {
+        const auto &key = v->keys[i];
+        auto contact = key.substr(key.find(L'\n') + 1);
+        if (lower(contact).find(search) == std::wstring::npos) continue;
+        auto app = key.starts_with(L"telegram\n") ? L"Telegram" :
+            key.starts_with(L"telegram-web\n") ? L"Telegram Web" :
+            key.starts_with(L"viber\n") ? L"Viber (inactive)" : L"Teams";
+        LVITEMW item{LVIF_TEXT | LVIF_PARAM};
+        item.iItem = ListView_GetItemCount(list);
+        item.pszText = contact.data();
+        item.lParam = static_cast<LPARAM>(i);
+        int row = ListView_InsertItem(list, &item);
+        if (row < 0) continue;
+        ListView_SetItemText(list, row, 1, const_cast<wchar_t *>(app));
+        if (selection < 0 || static_cast<int>(i) == v->selection) selection = static_cast<int>(i);
+    }
+    selectChatRow(list, selection);
+    SendMessageW(list, WM_SETREDRAW, TRUE, 0);
+    InvalidateRect(list, nullptr, TRUE);
+    v->updatingList = false;
+    v->selection = selection;
+    fillChatLanguages(w, v);
+}
 LRESULT CALLBACK chatLanguagesProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
 {
     auto *v = (ChatLanguagesView *)GetWindowLongPtrW(w, GWLP_USERDATA);
     if (!v) return DefWindowProcW(w, msg, wp, lp);
     try
     {
+        if (msg == WM_NOTIFY && !v->updatingList)
+        {
+            auto *change = reinterpret_cast<const NMLISTVIEW *>(lp);
+            if (change->hdr.idFrom == 710 && change->hdr.code == LVN_ITEMCHANGED &&
+                (change->uNewState & LVIS_SELECTED) && !(change->uOldState & LVIS_SELECTED))
+            {
+                int selected = static_cast<int>(change->lParam);
+                if (selected == v->selection) return 0;
+                try { collectChatLanguages(w, v); }
+                catch (...)
+                {
+                    v->updatingList = true;
+                    selectChatRow(change->hdr.hwndFrom, v->selection);
+                    v->updatingList = false;
+                    throw;
+                }
+                v->selection = selected;
+                fillChatLanguages(w, v);
+                return 0;
+            }
+        }
         if (msg == WM_COMMAND)
         {
             int id = LOWORD(wp);
             if (id == 711 && HIWORD(wp) == LBN_SELCHANGE) { v->dirty = true; return 0; }
-            if (id == 710 && HIWORD(wp) == LBN_SELCHANGE)
+            if (id == 714 && HIWORD(wp) == EN_CHANGE && !v->updatingList)
             {
                 try { collectChatLanguages(w, v); }
-                catch (...) { SendDlgItemMessageW(w, 710, LB_SETCURSEL, v->selection, 0); throw; }
-                fillChatLanguages(w, v);
+                catch (...)
+                {
+                    v->updatingList = true;
+                    value(w, 714, v->search);
+                    v->updatingList = false;
+                    throw;
+                }
+                v->search = value(w, 714);
+                filterChatRows(w, v);
                 return 0;
             }
             if (id == IDOK || id == 713)
             {
-                int selected = (int)SendDlgItemMessageW(w, 710, LB_GETCURSEL, 0, 0);
+                int selected = v->selection;
+                if (id == IDOK && selected < 0) return 0;
                 if (selected < 0 || selected >= (int)v->keys.size())
                     throw std::runtime_error("Open a Telegram or Teams chat, then reopen this dialog.");
                 if (id == 713)
@@ -1195,7 +1332,14 @@ LRESULT CALLBACK chatLanguagesProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
             if (id == IDCANCEL) { DestroyWindow(w); return 0; }
         }
         if (msg == WM_CLOSE) { DestroyWindow(w); return 0; }
-        if (msg == WM_DPICHANGED) { resizeForDpi(w, wp, lp); return 0; }
+        if (msg == WM_DPICHANGED)
+        {
+            resizeForDpi(w, wp, lp);
+            auto list = GetDlgItem(w, 710);
+            ListView_SetColumnWidth(list, 0, scale(w, 442));
+            ListView_SetColumnWidth(list, 1, scale(w, 140));
+            return 0;
+        }
         if (msg == WM_NCDESTROY)
         {
             EnableWindow(v->parent, TRUE);
@@ -1221,19 +1365,25 @@ void showChatLanguages(HWND parent, SettingsView *settings)
         if (!key.empty()) data.keys.insert(std::move(key));
         return TRUE;
     }, (LPARAM)&context);
+    INITCOMMONCONTROLSEX controls{sizeof(controls), ICC_LISTVIEW_CLASSES};
+    InitCommonControlsEx(&controls);
     HWND w = makeWindow(*settings->app, L"KSwitcher.ChatLanguages", L"Languages for a chat", chatLanguagesProc, 640, 524);
     auto *v = new ChatLanguagesView{parent, settings, {keys.begin(), keys.end()}};
     v->draft = settings->draft;
+    v->updatingList = true;
     SetWindowLongPtrW(w, GWLP_HWNDPARENT, (LONG_PTR)parent);
     SetWindowLongPtrW(w, GWLP_USERDATA, (LONG_PTR)v);
-    label(w, L"Telegram / Telegram Web (Chrome) / Teams; Viber inactive", 18, 16, 604);
-    control(w, L"LISTBOX", L"", WS_TABSTOP | WS_VSCROLL | LBS_NOTIFY | LBS_NOINTEGRALHEIGHT | WS_BORDER,
-            710, 18, 44, 604, 140);
-    for (const auto &key : v->keys)
+    label(w, L"&Find contact", 18, 19, 106);
+    edit(w, 714, 130, 14, 492);
+    auto list = control(w, WC_LISTVIEWW, L"", WS_TABSTOP | WS_BORDER | LVS_REPORT | LVS_SINGLESEL |
+        LVS_SHOWSELALWAYS | LVS_NOSORTHEADER, 710, 18, 48, 604, 136);
+    ListView_SetExtendedListViewStyle(list, LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER | LVS_EX_LABELTIP);
+    for (const auto &[title, width] : {std::pair{L"Contact", 442}, std::pair{L"App", 140}})
     {
-        auto split = key.find(L'\n');
-        auto name = std::wstring(key.starts_with(L"telegram\n") ? L"Telegram: " : key.starts_with(L"telegram-web\n") ? L"Telegram Web: " : key.starts_with(L"viber\n") ? L"Viber (inactive): " : L"Teams: ") + key.substr(split + 1);
-        SendDlgItemMessageW(w, 710, LB_ADDSTRING, 0, (LPARAM)name.c_str());
+        LVCOLUMNW column{LVCF_TEXT | LVCF_WIDTH};
+        column.pszText = const_cast<wchar_t *>(title);
+        column.cx = scale(w, width);
+        ListView_InsertColumn(list, Header_GetItemCount(ListView_GetHeader(list)), &column);
     }
     control(w, L"STATIC", L"Open a chat, then reopen this dialog to add it.", 0, 712, 18, 194, 604, 26);
     label(w, L"Click languages to include (saved in the order shown)", 18, 228, 604);
@@ -1246,12 +1396,10 @@ void showChatLanguages(HWND parent, SettingsView *settings)
     button(w, L"&Remove profile", 713, 18, 476, 170);
     button(w, L"&Use languages", IDOK, 300, 476, 170);
     button(w, L"&Cancel", IDCANCEL, 486, 476, 136);
-    EnableWindow(GetDlgItem(w, IDOK), !keys.empty());
-    EnableWindow(GetDlgItem(w, 713), FALSE);
-    if (!keys.empty()) { SendDlgItemMessageW(w, 710, LB_SETCURSEL, 0, 0); fillChatLanguages(w, v); }
+    filterChatRows(w, v);
     EnableWindow(parent, FALSE);
     showRequestedWindow(w);
-    SetFocus(GetDlgItem(w, 710));
+    SetFocus(GetDlgItem(w, 714));
 }
 #include "ui_app_languages.inl"
 #include "ui_mouse_buttons.inl"
@@ -1784,6 +1932,15 @@ LRESULT CALLBACK settingsProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
                 return TRUE;
             }
             break;
+        case WM_CTLCOLORSTATIC:
+            if (reinterpret_cast<HWND>(lp) == GetDlgItem(w, 281))
+            {
+                auto dc = reinterpret_cast<HDC>(wp);
+                SetTextColor(dc, GetSysColor(COLOR_WINDOWTEXT));
+                SetBkColor(dc, GetSysColor(COLOR_WINDOW));
+                return reinterpret_cast<LRESULT>(GetSysColorBrush(COLOR_WINDOW));
+            }
+            break;
         case WM_INPUT:
             readMouseTestInput(w, *v, reinterpret_cast<HRAWINPUT>(lp));
             return DefWindowProcW(w, msg, wp, lp);
@@ -1827,6 +1984,12 @@ LRESULT CALLBACK settingsProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
         {
             SettingsStateRefresh refresh{w};
             int id = LOWORD(wp);
+            if (id == 282 && HIWORD(wp) == BN_CLICKED)
+            {
+                writeClipboard(w, textClip(value(w, 281)));
+                value(w, 283, L"Copied to clipboard.");
+                return 0;
+            }
             if (id >= 301 && id <= SaveSnippets && snippetCommand(w, &v->snippets, wp, true))
                 return 0;
             if (id == 220 && HIWORD(wp) == LBN_SELCHANGE && !v->filling)
@@ -2316,8 +2479,9 @@ void showSettings(App &app, bool visible)
     INITCOMMONCONTROLSEX tabsInit{sizeof(tabsInit), ICC_TAB_CLASSES};
     InitCommonControlsEx(&tabsInit);
     HWND tabs = control(w, WC_TABCONTROLW, L"", WS_TABSTOP, 260, 18, 16, 684, 32);
+    TabCtrl_SetPadding(tabs, scale(w, 3), scale(w, 3));
     const wchar_t *tabNames[] = {L"General", L"Languages", L"Shortcuts", L"Clipboard", L"Snippets", L"Mouse",
-                                 L"Sync", L"Computers", L"Diagnostics"};
+                                 L"Sync", L"Computers", L"Diagnostics", L"MCP"};
     for (int i = 0; i < (int)std::size(tabNames); ++i)
     {
         TCITEMW item{}; item.mask = TCIF_TEXT; item.pszText = const_cast<wchar_t *>(tabNames[i]);
@@ -2400,6 +2564,18 @@ void showSettings(App &app, bool visible)
     button(w, L"View l&og...", 256, 24, 110, 210);
     page();
 
+    label(w, L"Codex configuration", 24, 76, 660);
+    label(w, L"Paste this block into ~/.codex/config.toml to connect Codex to KSwitcher.", 24, 108, 660);
+    edit(w, 281, 24, 140, 660, 108, ES_MULTILINE | ES_READONLY | ES_AUTOHSCROLL | WS_HSCROLL | WS_BORDER);
+    const auto server = std::filesystem::path(executable()).parent_path() / L"KSwitcher.Config.exe";
+    value(w, 281, L"[mcp_servers.kswitcher]\r\ncommand = " +
+        wide(nlohmann::json(utf8(server.wstring())).dump()) + L"\r\nargs = [\"--mcp\"]\r\n");
+    label(w, L"Select text and press Ctrl+C, or copy the entire block below.", 24, 258, 660);
+    button(w, L"&Copy configuration", 282, 24, 288, 190);
+    control(w, L"STATIC", L"", 0, 283, 232, 293, 452, 24);
+    label(w, L"For remote logs, enable diagnostic log downloads on the paired computer.", 24, 338, 660);
+    page();
+
     control(w, L"STATIC", L"No unsaved settings.", 0, 261, 18, 430, 684, 24);
     button(w, L"Impo&rt...", 250, 18, 466, 125);
     button(w, L"&Export...", 251, 155, 466, 125);

src/ui_lan.inl

@@ -9,6 +9,9 @@ struct LanView
     std::string dragPeer;POINT dragStart{},dragPoint{};bool dragMoved{};
     std::string gridState;
     std::vector<std::wstring> rows;
+    std::string logRequest;
+    std::filesystem::path logDestination;
+    std::wstring transferMessage;
 };
 nlohmann::json lanRequest(App &app,const nlohmann::json &request)
 {
@@ -20,6 +23,19 @@ std::string selectedLan(HWND w,LanView &v)
     auto index=SendDlgItemMessageW(w,702,LB_GETCURSEL,0,0);
     return index>=0 && size_t(index)<v.ids.size() ? v.ids[size_t(index)] : "";
 }
+std::filesystem::path pickLanFile(HWND owner, bool save, const wchar_t *suggestion=L"")
+{
+    wchar_t path[32768]{};
+    wcsncpy_s(path,suggestion,_TRUNCATE);
+    OPENFILENAMEW dialog{sizeof(dialog)};
+    dialog.hwndOwner=owner;
+    dialog.lpstrFilter=L"All files\0*.*\0";
+    dialog.lpstrFile=path;
+    dialog.nMaxFile=std::size(path);
+    dialog.Flags=OFN_EXPLORER|OFN_NOCHANGEDIR|OFN_PATHMUSTEXIST|(save?OFN_OVERWRITEPROMPT:OFN_FILEMUSTEXIST);
+    if(save?GetSaveFileNameW(&dialog):GetOpenFileNameW(&dialog))return path;
+    return {};
+}
 LRESULT CALLBACK lanHelpProc(HWND w,UINT msg,WPARAM wp,LPARAM lp)
 {
     if(msg==WM_DPICHANGED){resizeForDpi(w,wp,lp);return 0;}
@@ -42,6 +58,25 @@ void showLanHelp(HWND parent,App &app)
 }
 void refreshLan(HWND w,LanView &v)
 {
+    if(!v.logRequest.empty())
+    {
+        auto reply=lanRequest(*v.app,{{"action","takeLog"},{"request",v.logRequest}});
+        auto state=reply.at("state").get<std::string>();
+        if(state!="waiting")
+        {
+            if(state=="ready")
+            {
+                v.logRequest.clear();
+                v.transferMessage.clear();
+                atomicWrite(v.logDestination,decodeLanLog(reply.at("logHex")));
+                v.transferMessage=L"Diagnostic log saved.";
+            }
+            else if(state=="denied")v.transferMessage=L"Remote diagnostic downloads are disabled on that PC.";
+            else if(state=="unavailable")v.transferMessage=L"The selected log is unavailable on that PC.";
+            else v.transferMessage=L"The remote log download timed out.";
+            v.logRequest.clear();
+        }
+    }
     auto selected=selectedLan(w,v);
     auto next=lanRequest(*v.app,{{"action","status"}});
     if(selected.empty())
@@ -104,6 +139,18 @@ void refreshLan(HWND w,LanView &v)
     EnableWindow(GetDlgItem(w,705),enabled&&online&&!pending&&!paired);
     EnableWindow(GetDlgItem(w,706),pending);
     EnableWindow(GetDlgItem(w,707),paired);
+    bool canTransfer=false;
+    for(const auto &peer:v.snapshot["peers"])
+        if(peer.at("id")==selected)canTransfer=paired&&peer.value("verified",false)&&peer.value("fileTransfer",false);
+    EnableWindow(GetDlgItem(w,726),canTransfer);
+    EnableWindow(GetDlgItem(w,727),canTransfer&&v.logRequest.empty());
+    EnableWindow(GetDlgItem(w,728),canTransfer&&v.logRequest.empty());
+    EnableWindow(GetDlgItem(w,730),!v.snapshot["files"].empty());
+    CheckDlgButton(w,729,v.snapshot.value("shareLogs",false)?BST_CHECKED:BST_UNCHECKED);
+    auto fileCount=v.snapshot["files"].size();
+    auto transferStatus=v.transferMessage;
+    if(transferStatus.empty())transferStatus=wide(v.snapshot.value("transferStatus",std::string{}));
+    value(w,731,fileCount?L"Incoming files: "+std::to_wstring(fileCount):transferStatus);
     for(int id:{703,704}) EnableWindow(GetDlgItem(w,id),enabled&&!pending&&!paired);
     auto positions=v.snapshot.value("positions",nlohmann::json::object());
     EnableWindow(GetDlgItem(w,715),enabled&&!positions.empty()&&!v.snapshot.value("shareInput",false));
@@ -154,6 +201,49 @@ LRESULT CALLBACK lanProc(HWND w,UINT msg,WPARAM wp,LPARAM lp)
             if(id==705) lanRequest(*v->app,{{"action","pair"},{"peer",peer},{"code",utf8(value(w,703))}});
             if(id==706) lanRequest(*v->app,{{"action","cancel"}});
             if(id==707) lanRequest(*v->app,{{"action","forget"},{"peer",peer}});
+            if(id==726)
+            {
+                auto file=pickLanFile(w,false);
+                if(!file.empty())
+                {
+                    lanRequest(*v->app,{{"action","sendFile"},{"peer",peer},{"path",utf8(file.wstring())}});
+                    v->transferMessage.clear();
+                }
+            }
+            if(id==727||id==728)
+            {
+                auto destination=pickLanFile(w,true,id==728?L"kswitcher-previous.log":L"kswitcher-remote.log");
+                if(!destination.empty())
+                {
+                    auto reply=lanRequest(*v->app,{{"action","requestLog"},{"peer",peer},{"previous",id==728}});
+                    v->logDestination=std::move(destination);
+                    v->logRequest=reply.at("request").get<std::string>();
+                    v->transferMessage=L"Downloading diagnostic log...";
+                }
+            }
+            if(id==729)lanRequest(*v->app,{{"action","shareLogs"},{"enabled",IsDlgButtonChecked(w,729)==BST_CHECKED}});
+            if(id==730 && !v->snapshot["files"].empty())
+            {
+                const auto file=v->snapshot["files"].front();
+                auto name=wide(file.at("name").get<std::string>());
+                auto question=wide(file.at("sender").get<std::string>())+L" sent "+name+L" ("+
+                    std::to_wstring(file.at("size").get<size_t>())+L" bytes).\n\nSave this file? Choose No to discard it.";
+                auto answer=MessageBoxW(w,question.c_str(),L"Incoming file",MB_YESNOCANCEL|MB_ICONQUESTION);
+                if(answer==IDYES || answer==IDNO)
+                {
+                    // A peer supplies the display name. Only offer it as a plain Windows filename.
+                    const bool validName = !name.empty() && name.size() <= 255 &&
+                        name.find_first_of(L"<>:\"/\\|?*") == name.npos &&
+                        name.back() != L'.' && name.back() != L' ' &&
+                        std::none_of(name.begin(), name.end(), [](wchar_t c) { return c < L' '; });
+                    auto destination=answer==IDYES?pickLanFile(w,true,validName?name.c_str():L"received-file"):
+                        std::filesystem::path{};
+                    if(answer==IDNO||!destination.empty())
+                        lanRequest(*v->app,{{"action",answer==IDYES?"saveFile":"discardFile"},{"id",file.at("id")},
+                            {"peer",file.at("peer")},{"path",utf8(destination.wstring())}});
+                }
+                v->transferMessage.clear();
+            }
             if(id==715)
             {
                 lanRequest(*v->app,{{"action","input"},{"enabled",true}});
@@ -167,7 +257,7 @@ LRESULT CALLBACK lanProc(HWND w,UINT msg,WPARAM wp,LPARAM lp)
 }
 void showLan(HWND parent,App &app)
 {
-    HWND w=makeWindow(app,L"KSwitcher.LAN",L"KSwitcher computers — mouse and keyboard",lanProc,740,908,0,false);
+    HWND w=makeWindow(app,L"KSwitcher.LAN",L"KSwitcher computers",lanProc,740,908,0,false);
     SetWindowLongPtrW(w,GWLP_HWNDPARENT,(LONG_PTR)parent);
     auto v=new LanView{parent,&app};SetWindowLongPtrW(w,GWLP_USERDATA,(LONG_PTR)v);
     label(w,L"Changes here save automatically. No need to click Save in Settings.",18,16,700);
@@ -190,8 +280,13 @@ void showLan(HWND parent,App &app)
     control(w,L"STATIC",L"",0,719,18,674,700,24);
     button(w,L"Enable &input sharing",715,18,706,330);
     button(w,L"&Stop input sharing",716,370,706,240);
-    control(w,L"STATIC",L"",0,718,18,744,700,64);
-    control(w,L"STATIC",L"Arrange the same physical layout on every PC. Pair each input source with every destination and enable input on all PCs. Clipboard goes to all paired PCs.",0,720,18,816,580,40);
+    control(w,L"STATIC",L"",0,718,18,744,700,30);
+    button(w,L"Send file…",726,18,774,144);
+    button(w,L"Incoming files…",730,174,774,160);
+    button(w,L"Download log…",727,346,774,164);
+    button(w,L"Previous log…",728,522,774,196);
+    control(w,L"BUTTON",L"Allow paired computers to download diagnostic logs",BS_AUTOCHECKBOX|WS_TABSTOP,729,18,808,700,24);
+    control(w,L"STATIC",L"",0,731,18,835,700,24);
     button(w,L"Connection &help",722,18,864,300);
     button(w,L"&Close",IDCANCEL,618,864,100);
     EnableWindow(parent,FALSE);showRequestedWindow(w);SetForegroundWindow(w);

src/ui_log.inl

@@ -177,11 +177,7 @@ void copyLogRows(HWND w, App &app)
                   L" -> " + entry.target + L"\t" + entry.outcome + L"\r\n" + entry.details + L"\r\n\r\n";
     }
     if (!copied.empty())
-    {
-        auto clip = textClip(copied);
-        clip.formats.push_back({0, L"ExcludeClipboardContentFromMonitorProcessing", {1, 0, 0, 0}});
-        app.ownSequence = writeClipboard(app.window, clip);
-    }
+        writeClipboard(app.window, textClip(copied));
 }
 LRESULT CALLBACK logProc(HWND w, UINT msg, WPARAM wp, LPARAM lp)
 {

src/update.h

@@ -2,7 +2,7 @@
 #include "platform.h"
 namespace ks
 {
-inline constexpr wchar_t AppVersion[] = L"0.6.73";
+inline constexpr wchar_t AppVersion[] = L"0.6.77";
 inline constexpr UINT UpdateMessage = WM_APP + 7;
 inline constexpr UINT UpdateCheckIntervalMs = 6 * 60 * 60 * 1000;
 inline constexpr UINT UpdateNotificationRetryMs = 5 * 60 * 1000;

tests/chat_profiles.cpp

@@ -179,7 +179,13 @@ int main()
             SendMessageW(automatic,WM_COMMAND,IDOK,0);
             require(!saveEnabled(),"reverting auto-correction draft disables Save");
             HWND tabs = GetDlgItem(parent, 260);
-            require(tabs && TabCtrl_GetItemCount(tabs) == 9, "nine settings categories");
+            require(tabs && TabCtrl_GetItemCount(tabs) == 10, "ten settings categories");
+            wchar_t mcpConfig[4096]{};
+            GetDlgItemTextW(parent, 281, mcpConfig, std::size(mcpConfig));
+            const std::wstring config(mcpConfig);
+            require(config.starts_with(L"[mcp_servers.kswitcher]\r\ncommand = \"") &&
+                    config.find(L"KSwitcher.Config.exe\"\r\nargs = [\"--mcp\"]") != std::wstring::npos,
+                    "MCP tab shows a Codex stdio configuration");
             for (int page = 0; page < TabCtrl_GetItemCount(tabs); ++page)
             {
                 TabCtrl_SetCurSel(tabs, page);
@@ -212,10 +218,18 @@ int main()
             SendMessageW(parent, WM_COMMAND, 259, 0);
             HWND dialog = findTestWindow(L"KSwitcher.ChatLanguages", nullptr);
             require(dialog && !IsWindowEnabled(parent), "chat dialog opens with disabled parent");
-            int index = (int)SendDlgItemMessageW(dialog, 710, LB_FINDSTRINGEXACT, -1, (LPARAM)L"Telegram: ! Fixture chat");
-            require(index >= 0, "saved chat listed");
-            SendDlgItemMessageW(dialog, 710, LB_SETCURSEL, index, 0);
-            SendMessageW(dialog, WM_COMMAND, MAKEWPARAM(710, LBN_SELCHANGE), 0);
+            auto findFixtureChat = [&](HWND chatDialog) {
+                SetDlgItemTextW(chatDialog, 714, L"! fIXTURE CHAT");
+                HWND list = GetDlgItem(chatDialog, 710);
+                require(ListView_GetItemCount(list) == 1, "case-insensitive contact search finds saved chat");
+                wchar_t appName[32]{};
+                ListView_GetItemText(list, 0, 1, appName, std::size(appName));
+                require(std::wstring(appName) == L"Telegram", "chat list shows the source app separately");
+            };
+            SetDlgItemTextW(dialog, 714, L"No matching fixture 8031");
+            require(ListView_GetItemCount(GetDlgItem(dialog, 710)) == 0 &&
+                    !IsWindowEnabled(GetDlgItem(dialog, IDOK)), "empty search results disable profile actions");
+            findFixtureChat(dialog);
             require(SendDlgItemMessageW(dialog, 711, LB_GETSELCOUNT, 0, 0) == 1, "saved single language selected");
             RedrawWindow(dialog, nullptr, nullptr, RDW_INVALIDATE | RDW_UPDATENOW | RDW_ALLCHILDREN);
             RECT rect{}; GetClientRect(dialog, &rect);
@@ -231,9 +245,7 @@ int main()
             require(!saveEnabled(),"cancelled chat edits do not enable Save");
             SendMessageW(parent, WM_COMMAND, 259, 0);
             dialog = findTestWindow(L"KSwitcher.ChatLanguages", nullptr);
-            index = (int)SendDlgItemMessageW(dialog, 710, LB_FINDSTRINGEXACT, -1, (LPARAM)L"Telegram: ! Fixture chat");
-            SendDlgItemMessageW(dialog, 710, LB_SETCURSEL, index, 0);
-            SendMessageW(dialog, WM_COMMAND, MAKEWPARAM(710, LBN_SELCHANGE), 0);
+            findFixtureChat(dialog);
             require(SendDlgItemMessageW(dialog, 711, LB_GETSELCOUNT, 0, 0) == 1, "cancel discards language edits");
             SendDlgItemMessageW(dialog, 711, LB_SETSEL, TRUE, -1);
             SendMessageW(dialog, WM_COMMAND, MAKEWPARAM(711, LBN_SELCHANGE), 0);
@@ -248,9 +260,7 @@ int main()
             require(!saveEnabled(),"reopened saved Settings is clean");
             SendMessageW(parent, WM_COMMAND, 259, 0);
             dialog = findTestWindow(L"KSwitcher.ChatLanguages", nullptr);
-            index = (int)SendDlgItemMessageW(dialog, 710, LB_FINDSTRINGEXACT, -1, (LPARAM)L"Telegram: ! Fixture chat");
-            SendDlgItemMessageW(dialog, 710, LB_SETCURSEL, index, 0);
-            SendMessageW(dialog, WM_COMMAND, MAKEWPARAM(710, LBN_SELCHANGE), 0);
+            findFixtureChat(dialog);
             SendMessageW(dialog, WM_COMMAND, 713, 0);
             require(IsWindow(dialog), "chat reset keeps dialog open");
             SendMessageW(dialog, WM_COMMAND, IDOK, 0);

tests/files_panel_frame.ps1

@@ -0,0 +1,78 @@
+param([string]$Executable = "$PSScriptRoot/../build/files-dev/KSwitcher.Files.exe")
+$ErrorActionPreference = 'Stop'
+Add-Type -AssemblyName System.Drawing
+Add-Type @'
+using System;
+using System.Runtime.InteropServices;
+public static class PanelFrameWindow {
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Rect { public int Left, Top, Right, Bottom; }
+    [DllImport("user32.dll")] public static extern bool GetWindowRect(IntPtr window, out Rect rect);
+    [DllImport("user32.dll")] public static extern IntPtr GetDlgItem(IntPtr window, int id);
+    [DllImport("user32.dll")] public static extern bool IsWindowVisible(IntPtr window);
+    [DllImport("user32.dll")] public static extern IntPtr GetForegroundWindow();
+    [DllImport("user32.dll")] public static extern IntPtr SetThreadDpiAwarenessContext(IntPtr context);
+}
+'@
+
+function Get-Bounds($Window) {
+    $bounds = [PanelFrameWindow+Rect]::new()
+    if (![PanelFrameWindow]::GetWindowRect($Window, [ref]$bounds)) { throw 'Missing panel control.' }
+    $bounds
+}
+
+function Read-Strip($X, $Y, $Width, $Height) {
+    $bitmap = [Drawing.Bitmap]::new($Width, $Height)
+    try {
+        $graphics = [Drawing.Graphics]::FromImage($bitmap)
+        try { $graphics.CopyFromScreen($X, $Y, 0, 0, $bitmap.Size) }
+        finally { $graphics.Dispose() }
+        for ($row = 0; $row -lt $Height; $row++) {
+            for ($column = 0; $column -lt $Width; $column++) {
+                $bitmap.GetPixel($column, $row).ToArgb()
+            }
+        }
+    } finally { $bitmap.Dispose() }
+}
+
+$process = Start-Process -FilePath (Resolve-Path $Executable) -PassThru
+$previousDpi = [PanelFrameWindow]::SetThreadDpiAwarenessContext([IntPtr](-4))
+try {
+    $keyboard = New-Object -ComObject WScript.Shell
+    for ($attempt = 0; $attempt -lt 50; $attempt++) {
+        $process.Refresh()
+        $window = $process.MainWindowHandle
+        if ($window -and $keyboard.AppActivate($process.Id)) { break }
+        Start-Sleep -Milliseconds 100
+    }
+    Start-Sleep -Milliseconds 300
+    if (!$window -or [PanelFrameWindow]::GetForegroundWindow() -ne $window) {
+        throw 'The test window must be visible and in the foreground.'
+    }
+    foreach ($panel in 0, 1) {
+        $heading = [PanelFrameWindow]::GetDlgItem($window, 140 + $panel)
+        if (![PanelFrameWindow]::IsWindowVisible($heading)) {
+            throw 'Both panels must use Wide mode for the frame test.'
+        }
+        $header = Get-Bounds $heading
+        $list = Get-Bounds ([PanelFrameWindow]::GetDlgItem($window, 102 + $panel))
+        $path = Get-Bounds ([PanelFrameWindow]::GetDlgItem($window, 142 + $panel))
+        $middle = [int](($header.Top + $header.Bottom) / 2)
+        $side = @(Read-Strip ($list.Left - 4) ($header.Top - 2) 4 1)
+        $atHeading = @(Read-Strip ($list.Left - 4) $middle 4 1)
+        if ($side[0] -ne $side[3] -or $side[1] -ne $side[2] -or $side[0] -eq $side[1] -or
+            ($atHeading -join ',') -ne ($side -join ',')) {
+            throw "Panel $panel has a broken double frame beside the column header."
+        }
+        $x = $list.Left + 16
+        $top = @(Read-Strip $x ($path.Top + [Math]::Floor(($path.Bottom - $path.Top) / 2) - 2) 1 4)
+        if (($top -join ',') -ne ($side -join ',')) { throw "Panel $panel has an inconsistent top frame." }
+        $bottom = @(Read-Strip $x ($list.Bottom + 4) 1 ($header.Bottom - $header.Top + 6))
+        $bottom = $bottom[($bottom.Count - 4)..($bottom.Count - 1)]
+        if (($bottom -join ',') -ne ($side -join ',')) { throw "Panel $panel has an inconsistent bottom frame." }
+        Write-Output "Panel $panel double frame verified on screen."
+    }
+} finally {
+    if ($previousDpi) { [void][PanelFrameWindow]::SetThreadDpiAwarenessContext($previousDpi) }
+    if (!$process.HasExited) { [void]$process.CloseMainWindow() }
+}

tests/files_terminal_resize.ps1

@@ -0,0 +1,174 @@
+param([string]$Executable = "$PSScriptRoot/../build/files-dev/KSwitcher.Files.exe", [switch]$GeometryOnly)
+$ErrorActionPreference = 'Stop'
+
+if (!$GeometryOnly) {
+    Add-Type -AssemblyName System.Drawing
+    Add-Type -ReferencedAssemblies @([Drawing.Bitmap].Assembly.Location, [Drawing.Color].Assembly.Location,
+        [Drawing.Graphics].Assembly.Location, [Drawing.Point].Assembly.Location, "System.Collections", "System.Runtime", "System.Threading.Thread", "System.Runtime.InteropServices", "System.Diagnostics.TraceSource", "System.Private.Windows.GdiPlus", "System.Private.Windows.Core") -TypeDefinition @'
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+public static class TerminalFrames
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct Rect { public int Left, Top, Right, Bottom; }
+    [DllImport("user32.dll")]
+    public static extern bool GetWindowRect(IntPtr window, out Rect rect);
+
+    [DllImport("user32.dll")]
+    private static extern void keybd_event(byte key, byte scan, uint flags, UIntPtr extra);
+    [DllImport("user32.dll")]
+    private static extern bool SetCursorPos(int x, int y);
+    [DllImport("user32.dll")]
+    private static extern void mouse_event(uint flags, uint x, uint y, uint data, UIntPtr extra);
+    [DllImport("user32.dll", CharSet=CharSet.Unicode)]
+    private static extern IntPtr FindWindowEx(IntPtr parent, IntPtr after, string kind, string title);
+    [DllImport("user32.dll", CharSet=CharSet.Unicode)]
+    private static extern IntPtr SendMessage(IntPtr window, int message, IntPtr length, System.Text.StringBuilder text);
+
+    public static void ClickOutput(IntPtr window)
+    {
+        Rect bounds;
+        if (!GetWindowRect(window, out bounds)) throw new InvalidOperationException("Missing test window.");
+        SetCursorPos((bounds.Left + bounds.Right) / 2, (bounds.Top + bounds.Bottom) / 2);
+        mouse_event(2, 0, 0, 0, UIntPtr.Zero);
+        mouse_event(4, 0, 0, 0, UIntPtr.Zero);
+    }
+
+    public static string ReadCommand(IntPtr window)
+    {
+        var input = FindWindowEx(window, IntPtr.Zero, "Edit", null);
+        var text = new System.Text.StringBuilder(256);
+        SendMessage(input, 13, new IntPtr(text.Capacity), text);
+        return text.ToString();
+    }
+
+    public static int[] Capture(IntPtr window, byte direction, int repeats)
+    {
+        Rect bounds;
+        if (!GetWindowRect(window, out bounds)) throw new InvalidOperationException("Missing test window.");
+        var positions = new List<int>();
+        var clock = Stopwatch.StartNew();
+        using (var bitmap = new Bitmap(150, 320))
+        using (var graphics = Graphics.FromImage(bitmap))
+        {
+            var trigger = new Thread(() => {
+                Thread.Sleep(100);
+                keybd_event(17, 0, 0, UIntPtr.Zero);
+                for (int i = 0; i < repeats; i++)
+                {
+                    keybd_event(direction, 0, 1, UIntPtr.Zero);
+                    if (i + 1 < repeats) Thread.Sleep(30);
+                }
+                keybd_event(direction, 0, 3, UIntPtr.Zero);
+                keybd_event(17, 0, 2, UIntPtr.Zero);
+            });
+            trigger.Start();
+            while (clock.ElapsedMilliseconds < 650)
+            {
+                graphics.CopyFromScreen(bounds.Left + 4, bounds.Bottom - 340, 0, 0, bitmap.Size);
+                int marker = -1;
+                for (int y = 0; y < bitmap.Height && marker < 0; y++)
+                    for (int x = 0; x < bitmap.Width; x++)
+                    {
+                        var color = bitmap.GetPixel(x, y);
+                        if (color.R > 140 && color.B > 140 && color.R - color.G > 35 && color.B - color.G > 35) { marker = y; break; }
+                    }
+                positions.Add(marker);
+                Thread.Sleep(4);
+            }
+            trigger.Join();
+        }
+        return positions.ToArray();
+    }
+}
+'@
+}
+function Wait-ForTrace([string]$Pattern, [int]$After = 0) {
+    for ($attempt = 0; $attempt -lt 100; $attempt++) {
+        $lines = @(Get-Content -LiteralPath $trace -ErrorAction SilentlyContinue)
+        $match = $lines | Select-Object -Skip $After | Where-Object { $_ -match $Pattern } | Select-Object -First 1
+        if ($match) { return $match }
+        Start-Sleep -Milliseconds 100
+    }
+    throw "Missing terminal event: $Pattern"
+}
+
+$process = Start-Process -FilePath (Resolve-Path $Executable) -ArgumentList '--terminal-trace' -PassThru
+$trace = Join-Path ([IO.Path]::GetTempPath()) "KSwitcher.Files.terminal-trace-$($process.Id).log"
+try {
+    $keyboard = New-Object -ComObject WScript.Shell
+    for ($attempt = 0; $attempt -lt 50 -and !$keyboard.AppActivate($process.Id); $attempt++) {
+        Start-Sleep -Milliseconds 100
+    }
+    if (!$keyboard.AppActivate($process.Id)) { throw 'Could not focus the test window.' }
+    Wait-ForTrace ' layout ' | Out-Null
+    for ($attempt = 0; $attempt -lt 20; $attempt++) {
+        $lines = @(Get-Content -LiteralPath $trace)
+        if ($lines -match ' layout \d+ \d+ \d+ 1 1$') { break }
+        if ($keyboard.AppActivate($process.Id)) { $keyboard.SendKeys('^o') }
+        Start-Sleep -Milliseconds 250
+    }
+    Wait-ForTrace ' web-anchor ' | Out-Null
+    if (!$GeometryOnly) {
+        [TerminalFrames]::ClickOutput($process.MainWindowHandle)
+        Start-Sleep -Milliseconds 200
+        $keyboard.SendKeys('focus-check')
+        Start-Sleep -Milliseconds 200
+        if ([TerminalFrames]::ReadCommand($process.MainWindowHandle) -ne 'focus-check') {
+            throw 'Typing after clicking terminal output did not reach the command line.'
+        }
+        $keyboard.SendKeys('^a{BACKSPACE}')
+        $keyboard.SendKeys('alpha beta gamma^{BACKSPACE}^{BACKSPACE}')
+        Start-Sleep -Milliseconds 150
+        if ([TerminalFrames]::ReadCommand($process.MainWindowHandle) -ne 'alpha ') {
+            throw 'Ctrl+Backspace did not delete one word per press.'
+        }
+        $keyboard.SendKeys('^a{BACKSPACE}')
+        Write-Output 'Typing after clicking terminal output reached the command line.'
+    }
+    $keyboard.SendKeys('[Console]::WriteLine{(}{[}char{]}27 {+} "{[}95mMMMMMMMM" {+} {[}char{]}27 {+} "{[}0m"{)}{ENTER}')
+    Start-Sleep -Milliseconds 500
+    $keyboard.SendKeys('^o')
+    for ($row = 0; $row -lt 5; $row++) { $keyboard.SendKeys('^{UP}') }
+    Start-Sleep -Milliseconds 500
+
+    foreach ($scenario in @(@{Key='UP'; Count=1}, @{Key='DOWN'; Count=1}, @{Key='UP'; Count=10})) {
+        $direction = $scenario.Key
+        $repeats = $scenario.Count
+        $after = @(Get-Content -LiteralPath $trace).Count
+        $event = if ($direction -eq 'UP') { 'grow' } else { 'shrink' }
+        $frames = $null
+        if ($GeometryOnly) {
+            $keyboard.SendKeys("^{$direction $repeats}")
+        } else {
+            $key = if ($direction -eq 'UP') { 38 } else { 40 }
+            $frames = [TerminalFrames]::Capture($process.MainWindowHandle, $key, $repeats)
+        }
+        Wait-ForTrace " key-$event " $after | Out-Null
+        Wait-ForTrace ' layout ' $after | Out-Null
+        Start-Sleep -Milliseconds 250
+        $events = @(Get-Content -LiteralPath $trace | Select-Object -Skip $after)
+        if (@($events -match " key-$event ").Count -lt $repeats) {
+            throw "Did not deliver all $repeats Ctrl+$direction events."
+        }
+        if ($events -match ' web-after-fit ') { throw "Terminal grid resized after Ctrl+$direction." }
+        if (!$GeometryOnly) {
+            $baseline = $frames[0]
+            if ($baseline -lt 0 -or $frames[-1] -lt 0) {
+                throw "Terminal marker was not visible at rest for Ctrl+$direction."
+            }
+            $shifted = @($frames | Where-Object { $_ -lt 0 -or [Math]::Abs($_ - $baseline) -gt 2 })
+            if ($shifted.Count) {
+                throw "Ctrl+$direction shifted or hid the marker in $($shifted.Count) of $($frames.Count) frames (rest Y=$baseline, sampled Y=$($frames | Sort-Object -Unique))."
+            }
+        }
+        Write-Output "Ctrl+$direction x$repeats kept the terminal grid stable."
+    }
+} finally {
+    if (!$process.HasExited) { $null = $process.CloseMainWindow() }
+}

tests/input.cpp

@@ -818,7 +818,7 @@ int main(int argc, char **argv) {
                 };
                 RECT lastTab{}, tabClient{};
                 GetClientRect(tabs, &tabClient);
-                require(TabCtrl_GetItemCount(tabs) == 9 && TabCtrl_GetItemRect(tabs, 8, &lastTab) &&
+                require(TabCtrl_GetItemCount(tabs) == 10 && TabCtrl_GetItemRect(tabs, 9, &lastTab) &&
                         lastTab.right <= tabClient.right, "all Settings tabs fit in one row");
                 selectPage(3);
                 require(visible(257) && !visible(301), "OCR options are in Clipboard");

tests/lan_clipboard.cpp

@@ -48,6 +48,37 @@ int main(){try{
     check(restarted.deliveries.size()==1&&restarted.deliveries[0].bytes==Bytes({1,2,3}),"clipboard works after peer restart");
     bool limited=false;try{a.queue({bid},Bytes(32*1024*1024+1),"large",12000);}catch(...){limited=true;}
     check(limited,"oversized clipboard bounded");
+    {
+        ClipboardExchange sender(aid,"file-transfer"),receiver(bid,"file-transfer"),clipboard(bid);
+        sender.peerSession(bid,receiver.session());receiver.peerSession(aid,sender.session());
+        clipboard.peerSession(aid,sender.session());
+        sender.queue({bid},payload,"file",1);
+        Json first;
+        for(uint64_t now=10;now<1000&&receiver.deliveries.empty();now+=10)
+        {
+            sender.poll(trusted,now,[&](const auto &to,const Json &packet){
+                check(to==bid && packet.at("type")=="file-transfer" && packet.dump().size()<=2048,
+                    "file transfer targets a single peer on its own channel");
+                if(first.is_null())first=packet;
+                packets.push_back({to,packet});
+            });
+            while(!packets.empty())
+            {
+                auto packet=std::move(packets.front().second);packets.pop_front();
+                receiver.receive(aid,key,packet,now,0,ack);
+            }
+            while(!acks.empty())
+            {
+                auto packet=std::move(acks.front().second);acks.pop_front();
+                sender.receive(bid,key,packet,now,0,output);
+            }
+        }
+        check(receiver.deliveries.size()==1&&receiver.deliveries.front().bytes==payload,"file payload arrives intact");
+        first["session"]=clipboard.session();
+        bool isolated=false;
+        try{clipboard.receive(aid,key,first,1001,0,ack);}catch(...){isolated=true;}
+        check(isolated&&acks.empty(),"file ciphertext cannot be injected into the clipboard channel");
+    }
     {
         WSADATA startup{};check(WSAStartup(MAKEWORD(2,2),&startup)==0,"UDP benchmark starts");
         SOCKET sa=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP),sb=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);

tests/screenshot_ui.cpp

@@ -14,7 +14,18 @@ int main(int argc, char **argv)
             std::filesystem::create_directories(root);
             struct Cleanup {std::filesystem::path root; ~Cleanup(){std::error_code ec; std::filesystem::remove_all(root,ec);}} cleanup{root};
             ks::ScreenshotHost app{GetModuleHandleW(nullptr)};
+            app.smoothingPreference=root/L"screenshot-smoothing";
             ks::Capture c(app);
+            require(c.smoothing==25,"missing preference uses default smoothing");
+            c.smoothing=61;
+            c.smoothingPreferenceDirty=true;
+            c.saveSmoothingPreference();
+            ks::Capture reopened(app);
+            require(reopened.smoothing==61,"new editor restores saved smoothing");
+            ks::atomicWrite(app.smoothingPreference,ks::Bytes{101});
+            ks::Capture invalidPreference(app);
+            require(invalidPreference.smoothing==25,"invalid preference uses default smoothing");
+            std::filesystem::remove(app.smoothingPreference);
             c.image=std::make_unique<ks::Surface>(320,240);
             PatBlt(c.image->dc,0,0,320,240,WHITENESS);
             c.marks={ks::Mark{{40,40},{180,140},0}};

tests/tests.cpp

@@ -592,6 +592,10 @@ int main(int argc, char **argv)
             require(!edited.suggest(L"hlelo ", 0, layouts, options), "never-correct overrides explicit pairs");
             options.autoNever.clear();
             options.autoReplacements[L"мамамила"] = L"мама мила";
+            options.autoReplacements[L"нав1язав"] = L"нав’язав";
+            ks::validateSettings(options);
+            correction = edited.suggest(L"Нав1язав ", 2, layouts, options);
+            require(correction && correction->text == L"Нав’язав ", "explicit replacements accept digits in the typo");
             for (const auto *text : {L"рев'ю", L"рев’ю", L"ревʼю", L"моє рев'ю"})
             {
                 options.autoReplacements[L"ревю"] = text;

tools/stage-files-terminal.ps1

@@ -0,0 +1,28 @@
+param([Parameter(Mandatory)][string]$Destination)
+$ErrorActionPreference = 'Stop'
+$root = Split-Path $PSScriptRoot
+$deps = New-Item -ItemType Directory -Force (Join-Path $root 'build/terminal-deps')
+$version = '1.0.4314.35'
+if (!(Test-Path "$deps/sdk/build/native/include/WebView2.h")) {
+    Invoke-WebRequest "https://api.nuget.org/v3-flatcontainer/microsoft.web.webview2/$version/microsoft.web.webview2.$version.nupkg" -OutFile "$deps/sdk.zip"
+    Expand-Archive "$deps/sdk.zip" "$deps/sdk" -Force
+}
+$assets = New-Item -ItemType Directory -Force (Join-Path $Destination 'terminal')
+foreach ($package in @(
+    @{ Name='xterm'; Spec='@xterm/[email protected]'; Archive='xterm-xterm-6.0.0.tgz'; Files=@{'lib/xterm.js'='xterm.js'; 'css/xterm.css'='xterm.css'; 'LICENSE'='xterm-LICENSE.txt'} },
+    @{ Name='fit'; Spec='@xterm/[email protected]'; Archive='xterm-addon-fit-0.11.0.tgz'; Files=@{'lib/addon-fit.js'='addon-fit.js'; 'LICENSE'='addon-fit-LICENSE.txt'} }
+)) {
+    if (!(Test-Path "$deps/$($package.Archive)")) {
+        & npm.cmd pack $package.Spec --pack-destination $deps.FullName --silent | Out-Host
+        if ($LASTEXITCODE) { throw "Could not download $($package.Spec)" }
+    }
+    $unpacked = New-Item -ItemType Directory -Force "$deps/$($package.Name)"
+    & tar -xf "$deps/$($package.Archive)" -C $unpacked.FullName
+    if ($LASTEXITCODE) { throw "Could not unpack $($package.Spec)" }
+    foreach ($file in $package.Files.Keys) {
+        Copy-Item "$unpacked/package/$file" "$assets/$($package.Files[$file])" -Force
+    }
+}
+Copy-Item "$root/resources/terminal/*" $assets -Force
+Copy-Item "$deps/sdk/build/native/x64/WebView2Loader.dll" $Destination -Force
+"$deps/sdk/build/native/include"