feat!: add Tauri GUI with full UX, auto-update, system tray, and cross-platform releases

Complete Tauri v2 desktop application with:

- Results view: dual-mode (grouped/flat), search, smart selection presets,
  impact cards, size heat colors, disk usage ring, system items integration
- Auto-update: tauri-plugin-updater with signed releases, custom notification UI,
  settings "Check for Updates" button
- System tray: menu bar icon, minimize-to-tray on close, Open/Quit menu
- CI/CD: cross-platform Tauri builds (dmg/nsis/deb/appimage) in release workflow,
  Tauri compile check in CI, release-please tauri.conf.json version sync
- UX polish: accessibility pass (aria-labels, focus-visible, keyboard nav),
  indeterminate scan progress, cancel button in cleaning overlay, partial
  failure handling in celebration view, confirm dialog improvements
- Branding: 3D robot mascot logo with yellow squircle app icon, favicon,
  docs, README

BREAKING CHANGE: project restructured as Cargo workspace with Tauri GUI crate

Author: us

.github/workflows/ci.yml

@@ -59,3 +59,27 @@ jobs:
         with:
           components: rustfmt
       - run: cargo fmt --all -- --check
+
+  tauri-check:
+    name: Tauri GUI Check
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install Linux dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-tauri-cargo-${{ hashFiles('**/Cargo.lock') }}
+      - uses: oven-sh/setup-bun@v2
+      - run: cd ui && bun install
+      - run: cd ui && bun run build
+      - run: cargo check -p null-e-gui

.github/workflows/release.yml

@@ -110,6 +110,63 @@ jobs:
             *.zip.sha256
           if-no-files-found: ignore
 
+  build-tauri:
+    name: Build Tauri ${{ matrix.target }}
+    needs: release
+    runs-on: ${{ matrix.platform }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: macos-latest
+            target: aarch64-apple-darwin
+          - platform: macos-latest
+            target: x86_64-apple-darwin
+          - platform: ubuntu-22.04
+            target: x86_64-unknown-linux-gnu
+          - platform: windows-latest
+            target: x86_64-pc-windows-msvc
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Rust cache
+        uses: swatinem/rust-cache@v2
+        with:
+          workspaces: './tauri -> target'
+
+      - name: Install Linux dependencies
+        if: matrix.platform == 'ubuntu-22.04'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwebkit2gtk-4.1-dev libappindicator3-dev librsvg2-dev patchelf
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+
+      - name: Install frontend dependencies
+        run: cd ui && bun install
+
+      - name: Build Tauri app
+        uses: tauri-apps/tauri-action@v0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          TAURI_SIGNING_PRIVATE_KEY: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY }}
+          TAURI_SIGNING_PRIVATE_KEY_PASSWORD: ${{ secrets.TAURI_SIGNING_PRIVATE_KEY_PASSWORD }}
+        with:
+          projectPath: ./tauri
+          tagName: ${{ github.ref_name }}
+          releaseName: 'null-e ${{ github.ref_name }}'
+          releaseBody: ''
+          releaseDraft: false
+          prerelease: ${{ contains(github.ref, 'alpha') || contains(github.ref, 'beta') || contains(github.ref, 'rc') }}
+          args: --target ${{ matrix.target }}
+
   release:
     name: Create Release
     needs: build

.gitignore

@@ -30,5 +30,11 @@ Thumbs.db
 # Docs
 docs/dist/
 
+# Node
+node_modules/
+ui/dist/
+
 # Test artifacts
 *.log
+.gstack/
+test-results/