feat(templates): add service language template management

Add normalized service and template catalogs, scoped administration, migration, validation, and regression coverage.

Ref: IT-1601

HrynCo.NotificationService.Web/wwwroot/css/admin.css

@@ -109,6 +109,120 @@ body {
 .table tbody tr td { vertical-align: middle; }
 .table thead th { font-size: .75rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
 
+/* ── List actions ─────────────────────────────────────── */
+.table .template-actions,
+.table .service-actions {
+    width: 1%;
+    white-space: nowrap;
+    text-align: right;
+}
+
+/* ── Service template catalog and filters ─────────────── */
+.service-template-grid > thead > tr > th {
+    --bs-table-bg: #dce7f6;
+    --bs-table-color: #243a55;
+    border-bottom: 2px solid #aec0db;
+}
+
+.service-template-grid .template-key-filter .btn-outline-secondary {
+    --bs-btn-bg: #fff;
+}
+
+.service-template-catalog,
+.template-language-statuses {
+    display: flex;
+    flex-wrap: wrap;
+    align-items: center;
+    gap: .375rem;
+}
+
+.service-template-language-code {
+    padding: .15rem .4rem;
+    border: 1px solid #dce3eb;
+    border-radius: .25rem;
+    background: #fff;
+    overflow-wrap: anywhere;
+}
+
+.template-key-filter {
+    min-width: 9rem;
+    max-width: 32rem;
+    font-weight: 400;
+    letter-spacing: normal;
+    text-transform: none;
+}
+
+.template-key-filter-controls {
+    display: flex;
+    flex-wrap: wrap;
+    gap: .375rem;
+}
+
+.template-key-filter-controls .form-control {
+    flex: 1 1 9rem;
+    min-width: 0;
+}
+
+.template-language-statuses {
+    margin: 0;
+    padding: 0;
+    list-style: none;
+}
+
+.template-language-status {
+    display: inline-flex;
+    flex-wrap: wrap;
+    gap: .25rem;
+    padding: .2rem .4rem;
+    border: 1px solid;
+    border-radius: .25rem;
+    font-size: .75rem;
+    overflow-wrap: anywhere;
+}
+
+.template-language-present {
+    color: #146c43;
+    background: #e8f5ec;
+    border-color: #b7dcc0;
+}
+
+.template-language-missing {
+    color: #825800;
+    background: #fff4df;
+    border-color: #f3d19e;
+}
+
+/* ── Service language actions ─────────────────────────── */
+.service-language-table .service-language-actions {
+    width: 1%;
+    text-align: right;
+}
+
+.service-language-table .service-language-action-buttons {
+    display: flex;
+    justify-content: flex-end;
+    gap: .5rem;
+}
+
+.service-language-table .service-language-action-buttons > .btn {
+    white-space: nowrap;
+}
+
+.service-language-table .form-control {
+    min-width: 4rem;
+}
+
+@media (max-width: 575.98px) {
+    .service-language-table .service-language-action-buttons {
+        flex-direction: column;
+        align-items: flex-end;
+    }
+
+    .service-language-table .service-language-action-buttons > .btn {
+        white-space: normal;
+    }
+}
+
 /* ── Empty state ──────────────────────────────────────── */
 .empty-state {
     text-align: center;
@@ -134,9 +248,7 @@ body {
 .editor-card-header-bar {
     background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
     color: #fff;
-    font-size: .9rem;
-    font-weight: 600;
-    padding: .75rem 1.25rem;
+    padding: 1rem 1.25rem;
     border-bottom: none;
     display: flex;
     align-items: center;
@@ -145,6 +257,20 @@ body {
 
 .editor-card-body { padding: 1.5rem 1.5rem 1rem; }
 
+.editor-card-header-bar .editor-card-title {
+    display: flex;
+    align-items: center;
+    gap: .625rem;
+    min-width: 0;
+    margin: 0;
+    font-size: 1.375rem;
+    font-weight: 600;
+    line-height: 1.3;
+}
+
+.editor-card-title > .bi { flex-shrink: 0; }
+.editor-card-title > span { min-width: 0; overflow-wrap: anywhere; }
+
 .editor-card-footer {
     background-color: #f8f9fa;
     border-top: 1px solid #e9ecef;
@@ -175,6 +301,82 @@ body {
     min-width: 0;
 }
 
+/* ── Template service context ─────────────────────────── */
+.template-editor-breadcrumbs .breadcrumb-item {
+    min-width: 0;
+    max-width: 100%;
+    overflow-wrap: anywhere;
+}
+
+.template-service-context {
+    margin: 0 0 .5rem;
+}
+
+.template-service-context > dt {
+    margin-bottom: .25rem;
+    color: #6b7280;
+    font-size: .75rem;
+    font-weight: 600;
+}
+
+.template-service-context > dd {
+    margin: 0;
+    color: #1f2937;
+    font-size: 1.25rem;
+    font-weight: 700;
+    line-height: 1.35;
+    overflow-wrap: anywhere;
+}
+
+.template-service-edit-link:focus-visible {
+    outline: 2px solid #0d6efd;
+    outline-offset: 2px;
+}
+
+/* ── Template language sheet ──────────────────────────── */
+.template-language-sheet {
+    min-width: 0;
+    border: 1px solid #dce3eb;
+    border-radius: .5rem;
+    background: #fff;
+}
+
+.template-language-sheet > .nav-tabs {
+    flex-wrap: nowrap;
+    gap: .25rem;
+    margin: 0;
+    padding: .5rem .5rem 0;
+    border-bottom: 0;
+    border-radius: .5rem .5rem 0 0;
+    background: #f3f6fb;
+    overflow-x: auto;
+    scrollbar-width: thin;
+}
+
+.template-language-sheet > .nav-tabs .nav-link {
+    flex: 0 0 auto;
+    margin-bottom: 0;
+    white-space: nowrap;
+}
+
+.template-language-sheet > .nav-tabs .nav-link.active {
+    border-color: #dce3eb #dce3eb #fff;
+    background: #fff;
+}
+
+.template-language-sheet > .nav-tabs .nav-link:focus-visible {
+    outline: 2px solid #0d6efd;
+    outline-offset: -3px;
+}
+
+.template-language-sheet > #languagePanes {
+    padding: 1rem;
+}
+
+.template-language-sheet .language-pane > :last-child {
+    margin-bottom: 0 !important;
+}
+
 /* ── Email template preview ───────────────────────────── */
 .template-preview-panel {
     border: 1px solid #dce3eb;