feat: production readiness improvements

## Error Handling
- Add GlobalErrorBoundary with error classification and recovery
- Add custom error types (SecurityError, ConnectionError, TimeoutError)
- Fix ErrorAlert component syntax errors

## Offline Mode
- Add offlineStore for offline state management
- Implement message queue with localStorage persistence
- Add exponential backoff reconnection (1s→60s)
- Add OfflineIndicator component with status display
- Queue messages when offline, auto-retry on reconnect

## Security Hardening
- Add AES-256-GCM encryption for chat history storage
- Add secure API key storage with OS keychain integration
- Add security audit logging system
- Add XSS prevention and input validation utilities
- Add rate limiting and token generation helpers

## CI/CD (Gitea Actions)
- Add .gitea/workflows/ci.yml for continuous integration
- Add .gitea/workflows/release.yml for release automation
- Support Windows Tauri build and release

## UI Components
- Add LoadingSpinner, LoadingOverlay, LoadingDots components
- Add MessageSkeleton, ConversationListSkeleton skeletons
- Add EmptyMessages, EmptyConversations empty states
- Integrate loading states in ChatArea and ConversationList

## E2E Tests
- Fix WebSocket mock for streaming response tests
- Fix approval endpoint route matching
- Add store state exposure for testing
- All 19 core-features tests now passing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitea/workflows/release.yml

@@ -0,0 +1,139 @@
+# ZCLAW Release Workflow for Gitea
+# Builds Tauri application and creates Gitea Release
+# Triggered by pushing version tags (e.g., v0.2.0)
+
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  NODE_VERSION: '20'
+  PNPM_VERSION: '9'
+  RUST_VERSION: '1.78'
+
+jobs:
+  # ============================================================================
+  # Build Tauri Application for Windows
+  # ============================================================================
+  build-windows:
+    name: Build Windows
+    runs-on: windows-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: ${{ env.PNPM_VERSION }}
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'pnpm'
+
+      - name: Setup Rust
+        uses: dtolnay/rust-action@stable
+
+      - name: Cache Rust dependencies
+        uses: Swatinem/rust-cache@v2
+        with:
+          workspaces: |
+            desktop/src-tauri
+
+      - name: Install frontend dependencies
+        working-directory: desktop
+        run: pnpm install --frozen-lockfile
+
+      - name: Prepare OpenFang Runtime
+        working-directory: desktop
+        run: pnpm prepare:openfang-runtime
+
+      - name: Build Tauri application
+        working-directory: desktop
+        run: pnpm tauri:build:bundled
+
+      - name: Find installer
+        id: find-installer
+        shell: pwsh
+        run: |
+          $installer = Get-ChildItem -Path "desktop/src-tauri/target/release/bundle/nsis" -Filter "*.exe" -Recurse | Select-Object -First 1
+          echo "INSTALLER_PATH=$($installer.FullName)" >> $env:GITEA_OUTPUT
+          echo "INSTALLER_NAME=$($installer.Name)" >> $env:GITEA_OUTPUT
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: windows-installer
+          path: ${{ steps.find-installer.outputs.INSTALLER_PATH }}
+          retention-days: 30
+
+  # ============================================================================
+  # Create Gitea Release
+  # ============================================================================
+  create-release:
+    name: Create Release
+    needs: build-windows
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Download Windows artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: windows-installer
+          path: ./artifacts
+
+      - name: Get version from tag
+        id: get_version
+        run: echo "VERSION=${GITEA_REF#refs/tags/}" >> $GITEA_OUTPUT
+
+      - name: Create Gitea Release
+        uses: actions/gitea-release@v1
+        with:
+          tag_name: ${{ gitea.ref_name }}
+          name: ZCLAW ${{ steps.get_version.outputs.VERSION }}
+          body: |
+            ## ZCLAW ${{ steps.get_version.outputs.VERSION }}
+
+            ### Changes
+            - See CHANGELOG.md for details
+
+            ### Downloads
+            - **Windows**: Download the `.exe` installer below
+
+            ### System Requirements
+            - Windows 10/11 (64-bit)
+          draft: true
+          prerelease: false
+          files: |
+            ./artifacts/*.exe
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+
+  # ============================================================================
+  # Build Summary
+  # ============================================================================
+  release-summary:
+    name: Release Summary
+    needs: [build-windows, create-release]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Release Summary
+        run: |
+          echo "## Release Build Complete"
+          echo ""
+          echo "**Tag**: ${{ gitea.ref_name }}"
+          echo ""
+          echo "### Artifacts"
+          echo "- Windows installer uploaded to release"
+          echo ""
+          echo "### Next Steps"
+          echo "1. Review the draft release"
+          echo "2. Update release notes if needed"
+          echo "3. Publish the release when ready"