Coordinators now dispatch per-OS builds via API

Previously per-OS build workflows triggered on tag push events, but
Gitea doesn't fire events for tags pushed by other workflows. Now:

- release.yml dispatches build-app-{linux,windows,macos}.yml via
  the Gitea API after creating the tag and release
- sidecar-release.yml dispatches build-sidecar-{linux,windows,macos}.yml

Per-OS workflows changed from push+dispatch triggers to dispatch-only
with tag as a required input. To re-run a failed build for the same
version, just dispatch the specific OS workflow with the same tag --
upload logic replaces existing assets automatically.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -25,11 +25,9 @@ jobs:
       - name: Bump patch version
         id: bump
         run: |
-          # Read current version from package.json
           CURRENT=$(grep '"version"' package.json | head -1 | sed 's/.*"version": *"\([^"]*\)".*/\1/')
           echo "Current version: ${CURRENT}"
 
-          # Increment patch number
           MAJOR=$(echo "${CURRENT}" | cut -d. -f1)
           MINOR=$(echo "${CURRENT}" | cut -d. -f2)
           PATCH=$(echo "${CURRENT}" | cut -d. -f3)
@@ -37,16 +35,9 @@ jobs:
           NEW_VERSION="${MAJOR}.${MINOR}.${NEW_PATCH}"
           echo "New version: ${NEW_VERSION}"
 
-          # Update package.json
           sed -i "s/\"version\": \"${CURRENT}\"/\"version\": \"${NEW_VERSION}\"/" package.json
-
-          # Update src-tauri/tauri.conf.json
           sed -i "s/\"version\": \"${CURRENT}\"/\"version\": \"${NEW_VERSION}\"/" src-tauri/tauri.conf.json
-
-          # Update src-tauri/Cargo.toml
           sed -i "s/^version = \"${CURRENT}\"/version = \"${NEW_VERSION}\"/" src-tauri/Cargo.toml
-
-          # Update version.py
           sed -i "s/__version__ = \"${CURRENT}\"/__version__ = \"${NEW_VERSION}\"/" version.py
           sed -i "s/__version_info__ = .*/__version_info__ = (${MAJOR}, ${MINOR}, ${NEW_PATCH})/" version.py
 
@@ -81,3 +72,20 @@ jobs:
             -d "{\"tag_name\": \"${TAG}\", \"name\": \"${RELEASE_NAME}\", \"body\": \"Automated build.\", \"draft\": false, \"prerelease\": false}" \
             "${REPO_API}/releases"
           echo "Created release: ${RELEASE_NAME}"
+
+      - name: Trigger per-OS app builds
+        env:
+          BUILD_TOKEN: ${{ secrets.BUILD_TOKEN }}
+        run: |
+          REPO_API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
+          TAG="${{ steps.bump.outputs.tag }}"
+
+          for workflow in build-app-linux.yml build-app-windows.yml build-app-macos.yml; do
+            echo "Dispatching ${workflow} for ${TAG}..."
+            HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" -X POST \
+              -H "Authorization: token ${BUILD_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d "{\"ref\": \"main\", \"inputs\": {\"tag\": \"${TAG}\"}}" \
+              "${REPO_API}/actions/workflows/${workflow}/dispatches")
+            echo "  -> HTTP ${HTTP_CODE}"
+          done