fix(desktop): restore backups and align macOS titlebar for v0.2.1

.github/workflows/desktop-release-package.yml

@@ -546,15 +546,24 @@ jobs:
   build-macos:
     name: macOS arm64 DMG
     if: ${{ (github.event_name == 'push' && startsWith(github.ref, 'refs/tags/desktop-portable-')) || (github.event_name == 'workflow_dispatch' && (github.event.inputs.target == 'all' || github.event.inputs.target == 'macos')) }}
-    runs-on: macos-15
+    runs-on: macos-26
     permissions:
       contents: read
+    env:
+      DEVELOPER_DIR: /Applications/Xcode_26.5.app/Contents/Developer
     steps:
       - name: Checkout repository
         uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
         with:
           persist-credentials: false
 
+      - name: Verify pinned macOS build environment
+        run: |
+          test "$(uname -m)" = arm64
+          test "$(xcodebuild -version | sed -n '1p')" = "Xcode 26.5"
+          test "$(xcodebuild -version | sed -n '2p')" = "Build version 17F42"
+          test "$(xcrun --sdk macosx --show-sdk-version)" = "26.5"
+
       - name: Set up Node.js
         uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         with:
@@ -587,9 +596,6 @@ jobs:
           python3 -m pip install --require-hashes --only-binary=:all:
           --requirement frontends/desktop/packaging/dmg-build-requirements.txt
 
-      - name: Assert macOS runner architecture
-        run: test "$(uname -m)" = arm64
-
       - name: Verify tracked compiled renderer bytes
         working-directory: frontends/desktop
         run: npm run test:dist

frontends/desktop/DESIGN.md

@@ -69,7 +69,7 @@ existing core contracts.
 
 ## Version and release contract
 
-Desktop package metadata is `0.2.0` across npm, Cargo, Tauri, and generated provenance. Upstream packages consume
+Desktop package metadata is `0.2.1` across npm, Cargo, Tauri, and generated provenance. Upstream packages consume
 the tracked `dist/**` tree, so an upstream maintainer can build official Windows, Linux, and macOS artifacts
 without the React source. A `desktop-portable-*` tag starts three read-only platform builders. One separate
 publisher receives write permission only after all three succeed, validates the six expected files and checksums,

frontends/desktop/dist/README.md

@@ -1,6 +1,6 @@
 # GenericAgent React Desktop 2.0 — compiled distribution
 
-This directory contains generated HTML, JavaScript, CSS, fonts, images, and license notices for the
+This directory contains the v0.2.1 generated HTML, JavaScript, CSS, fonts, images, and license notices for the
 GenericAgent React Desktop 2.0 renderer. It is build output, not the React development tree.
 
 ## Source and contributions
@@ -9,7 +9,7 @@ The public React source of truth and the place for renderer issues, pull request
 
 - <https://github.com/abraxas914/GenericAgent>
 - Exact source used for this distribution:
-  [`9fe5d69b85cfad8778ace84b6f69bc75f9e0d392`](https://github.com/abraxas914/GenericAgent/commit/9fe5d69b85cfad8778ace84b6f69bc75f9e0d392)
+  [`e7bfb038b972c7cc5fda7134c777ef2df7ac222d`](https://github.com/abraxas914/GenericAgent/commit/e7bfb038b972c7cc5fda7134c777ef2df7ac222d)
 
 Over the two-month React Desktop 2.0 development cycle, [abraxas914](https://github.com/abraxas914) led the new
 renderer architecture and UI, Desktop bridge and Tauri integration, startup and recovery surfaces, package