Release v0.6.53: synchronize chat language profiles

Release/README.md

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 # Latest Windows release
 
-## v0.6.52 — 2026-11-06
+## v0.6.53 — 2026-11-06
 
 ## Changes
-- Add **Arc (U)** to the screenshot editor toolbar, with its own cursor and drawing hint. Drag a rectangle to draw an open half ellipse; the endpoints are not joined by a straight chord.
-- Resize arcs using the corner handles, rotate them with the round handle (Shift snaps to 15 degrees), move or clone them, and adjust their color, thickness and line style. Undo/redo, connector attachment and full-resolution PNG export preserve the open curve.
-- Widen the editor's minimum window width to fit the additional toolbar button.
-- Retain v0.6.51 Telegram Web K chat profiles in Chrome and application-specific snippets, including their compatibility requirements below.
+- Include messenger chat language profiles in settings synchronization: Telegram Desktop, Telegram Web K in Chrome, Teams and saved inactive Viber profiles. Manual export/import continues to include them. Viber recognition remains disabled.
+- Merge profiles by application and chat name. Independent chat changes merge; conflicting language lists and deletion versus editing of the same chat use the existing per-setting conflict choices. Preserve each profile's language order and propagate deletions.
+- Preserve saved profile IDs when a layout is missing on a PC; switching skips unavailable layouts and falls back to the global cycle if none remain. **Keep this PC's layouts** keeps the global layout cycle and shortcuts local while chat profiles still synchronize.
+- Preserve local chat profiles when downloading older shared settings that do not contain the chat field. An explicit empty chat map from the new version removes profiles. Update every synchronizing PC before sharing the new format.
+- Retain the **Arc (U)** screenshot tool from v0.6.52.
 
 ## Validation
-Passed 332 native checks, 568 input checks, 674 chat-profile checks, 108 sync checks, dictionary equivalence (140,939 words), wheel, StayHere, Utilities, screenshot UI/save/registration, 54 updater checks and updater progress checks. Arc checks cover toolbar selection, drawing, open-curve hit testing and rendering, resizing, rotation, connector attachment, undo/redo and PNG export. Inspected an actual editor rendering with the Arc tool selected. Published package checksums, manifests, executable versions, update selection and English/Ukrainian Wiki pages are verified during publication.
+Passed 126 sync checks (18 new checks for chat profiles), 674 chat-profile checks, 568 input checks, 332 native checks, dictionary equivalence (140,939 words), wheel, StayHere, Utilities, screenshot UI/save/registration, 54 updater checks and updater progress checks. Chat sync checks cover upload/download, older-profile migration, independent merges, persisted conflict resolution, deletion, Unicode names, layout order, missing layouts, partial synchronization and malformed data rejection. Published assets, versions, checksums, update selection and bilingual Wiki pages are verified during publication.
 
 ## Upgrade and compatibility
 Choose **Update** in the tray menu. Legacy v0.3.0–v0.4.1 clients first receive the v0.4.2 compatibility bridge, then the current full release. v0.2.3 and earlier require manual installation.
 For manual installation, exit KSwitcher, close its configurator and screenshot editors, and extract the entire ZIP into its installation folder. Keep personal `data/`, customized dictionaries and your own tools. Keep the three KSwitcher executables together; StayHere runs independently.
 
-**Update every synchronizing PC to v0.6.51 or newer before sharing application-specific snippets. Older versions do not understand application restrictions and may treat scoped snippets as global.** Keep a backup before downgrading. Settings with Telegram Web profiles require v0.6.51 or newer. Chat profiles remain local, included in manual export/import and excluded from cloud synchronization.
+**Update every synchronizing PC to v0.6.51 or newer before sharing application-specific snippets. Older versions do not understand application restrictions and may treat scoped snippets as global.** Keep a backup before downgrading. Settings with Telegram Web profiles require v0.6.51 or newer. Chat profiles now synchronize from v0.6.53. Update every synchronizing PC to v0.6.53 or newer before syncing: older clients reject the chat-profile field. Synchronization stores application names, visible chat names and language IDs on your configured OpenBao server. No message contents are included.
 
 Download **KSwitcher-win-x64.zip** with **SHA256SUMS.txt**. The package contains no personal settings, credentials or clipboard history.
 

Release/SHA256SUMS.txt

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-fdc093c4a45c55fcee7ae4c9b597d56ea95293bd8995ed84cc2c0460e8855d58  KSwitcher-win-x64.zip
+18ed8074c5c9a064b667612721389967f6fb758d7162abbcf4b73437724d2606  KSwitcher-win-x64.zip