BREAKING CHANGE(config): convert configuration management to read-only; remove updateConfiguration endpoint and client-side editing

readme.hints.md

@@ -1264,4 +1264,56 @@ Login state was using `'soft'` mode in Smartstate which is memory-only:
 2. `ts/opsserver/handlers/admin.handler.ts`: JWT expiry changed from 7 days to 24 hours
 3. `ts_web/elements/ops-dashboard.ts`: Added JWT expiry check on session restore
    - Validates stored JWT hasn't expired before auto-logging in
-   - Clears expired sessions and shows login form
+   - Clears expired sessions and shows login form
+
+## Config UI Read-Only Conversion (2026-02-03)
+
+### Overview
+The configuration UI has been converted from an editable interface to a read-only display. DcRouter is configured through code or remotely, not through the UI.
+
+### Changes Made
+
+1. **Backend (`ts/opsserver/handlers/config.handler.ts`)**:
+   - Removed `updateConfiguration` handler
+   - Removed `updateConfiguration()` private method
+   - Kept `getConfiguration` handler (read-only)
+
+2. **Interfaces (`ts_interfaces/requests/config.ts`)**:
+   - Removed `IReq_UpdateConfiguration` interface
+   - Kept `IReq_GetConfiguration` interface
+
+3. **Frontend (`ts_web/elements/ops-view-config.ts`)**:
+   - Removed `editingSection` and `editedConfig` state properties
+   - Removed `startEdit()`, `cancelEdit()`, `saveConfig()` methods
+   - Removed Edit/Save/Cancel buttons
+   - Removed warning banner about immediate changes
+   - Enhanced read-only display with:
+     - Status badges for boolean values (enabled/disabled)
+     - Array display as pills/tags with counts
+     - Section icons (mail, globe, network, shield)
+     - Better formatting for numbers and byte sizes
+     - Empty state handling ("Not configured", "None configured")
+     - Info note explaining configuration is read-only
+
+4. **State Management (`ts_web/appstate.ts`)**:
+   - Removed `updateConfigurationAction`
+   - Kept `fetchConfigurationAction` (read-only)
+
+5. **Tests (`test/test.protected-endpoint.ts`)**:
+   - Replaced `updateConfiguration` tests with `verifyIdentity` tests
+   - Added test for read-only config access
+   - Kept auth flow testing with different protected endpoint
+
+6. **Documentation**:
+   - `readme.md`: Updated API endpoints to show config as read-only
+   - `ts_web/readme.md`: Removed `updateConfigurationAction` from actions list
+   - `ts_interfaces/readme.md`: Removed `IReq_UpdateConfiguration` from table
+
+### Visual Display Features
+- Boolean values shown as colored badges (green=enabled, red=disabled)
+- Arrays displayed as pills with count summaries
+- Section headers with relevant Lucide icons
+- Numbers formatted with locale separators
+- Byte sizes auto-formatted (B, KB, MB, GB)
+- Time values shown with "seconds" suffix
+- Nested objects with visual indentation