refactor: remove legacy Tauri desktop support

Electron updater now uses Electron release metadata only
Removed legacy Tauri package and migration workflow
Replaced Tauri shim usage with the desktop bridge

packages/web/server/lib/notifications/emitter-runtime.js

@@ -46,8 +46,7 @@ export const createNotificationEmitterRuntime = (dependencies) => {
     }
 
     try {
-      // stdout IPC: Tauri shell spawns this process as a sidecar and parses
-      // its stdout for the one-line `${prefix}{json}` protocol.
+      // stdout fallback for runtimes that parse the one-line `${prefix}{json}` protocol.
       process.stdout.write(`${desktopNotifyPrefix}${JSON.stringify(payload)}\n`);
     } catch {
       // ignore
@@ -64,9 +63,9 @@ export const createNotificationEmitterRuntime = (dependencies) => {
       type: 'openchamber:notification',
       properties: {
         ...payload,
-        // Tell the UI whether the sidecar stdout notification channel is active.
+        // Tell the UI whether the stdout notification channel is active.
         // When true, the desktop UI should skip this SSE notification to avoid duplicates.
-        // When false (e.g. tauri dev), the UI must handle this SSE notification itself.
+        // When false, the UI must handle this SSE notification itself.
         desktopStdoutActive: desktopNotifyEnabled,
       },
     };

packages/web/server/lib/package-manager.js

@@ -29,7 +29,7 @@ function getOpenChamberConfigDir() {
 }
 
 function sanitizeInstallScope(scope) {
-  if (scope === 'desktop-electron' || scope === 'desktop-tauri' || scope === 'vscode' || scope === 'web') return scope;
+  if (scope === 'desktop-electron' || scope === 'vscode' || scope === 'web') return scope;
   return 'web';
 }
 
@@ -65,7 +65,7 @@ function mapArch(value) {
 }
 
 function normalizeAppType(value) {
-  if (value === 'web' || value === 'desktop-electron' || value === 'desktop-tauri' || value === 'vscode') return value;
+  if (value === 'web' || value === 'desktop-electron' || value === 'vscode') return value;
   return 'web';
 }
 

packages/web/server/lib/package-manager.test.js

@@ -115,27 +115,6 @@ describe('checkForUpdates', () => {
     expect(result.available).toBe(false);
   });
 
-  it('does not cross-check desktop update claims against npm', async () => {
-    fetchMock
-      .when('api.openchamber.dev', {
-        ok: true,
-        json: async () => ({
-          latestVersion: '1.10.0',
-          updateAvailable: true,
-          releaseNotes: '## [1.10.0] - 2026-05-01\n\n- Great new feature',
-        }),
-      });
-
-    const result = await checkForUpdates({
-      appType: 'desktop-tauri',
-      currentVersion: '1.9.10',
-    });
-
-    expect(result.available).toBe(true);
-    expect(result.version).toBe('1.10.0');
-    expect(fetchMock).toHaveBeenCalledTimes(1);
-  });
-
   it('accepts electron desktop update claims without npm cross-checking', async () => {
     fetchMock
       .when('api.openchamber.dev', {