ci: add E2E test workflow with xvfb and LLM-judged test gating

3 jobs (vitest, cargo, e2e), path-filtered triggers on v2 source changes,
xvfb-run for headless WebKit2GTK, LLM-judged tests gated on
ANTHROPIC_API_KEY secret availability.

.github/workflows/e2e.yml

@@ -0,0 +1,175 @@
+name: E2E Tests
+
+on:
+  push:
+    branches: [v2-mission-control]
+    paths:
+      - 'v2/src/**'
+      - 'v2/src-tauri/**'
+      - 'v2/bterminal-core/**'
+      - 'v2/tests/e2e/**'
+      - '.github/workflows/e2e.yml'
+  pull_request:
+    branches: [master, v2-mission-control]
+    paths:
+      - 'v2/src/**'
+      - 'v2/src-tauri/**'
+      - 'v2/bterminal-core/**'
+      - 'v2/tests/e2e/**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  unit-tests:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: v2/package-lock.json
+
+      - name: Install npm dependencies
+        working-directory: v2
+        run: npm ci --legacy-peer-deps
+
+      - name: Run Vitest
+        working-directory: v2
+        run: npm run test
+
+  cargo-tests:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libwebkit2gtk-4.1-dev \
+            libgtk-3-dev \
+            libayatana-appindicator3-dev \
+            librsvg2-dev \
+            libssl-dev \
+            build-essential \
+            pkg-config
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            v2/target
+          key: ${{ runner.os }}-cargo-test-${{ hashFiles('v2/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-test-
+
+      - name: Run cargo tests
+        working-directory: v2/src-tauri
+        run: cargo test
+
+  e2e-tests:
+    runs-on: ubuntu-22.04
+    needs: [unit-tests, cargo-tests]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y \
+            libwebkit2gtk-4.1-dev \
+            libgtk-3-dev \
+            libayatana-appindicator3-dev \
+            librsvg2-dev \
+            libssl-dev \
+            build-essential \
+            pkg-config \
+            xvfb
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+          cache-dependency-path: v2/package-lock.json
+
+      - name: Setup Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Rust dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            v2/target
+          key: ${{ runner.os }}-cargo-e2e-${{ hashFiles('v2/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-cargo-e2e-
+
+      - name: Install tauri-driver
+        run: cargo install tauri-driver
+
+      - name: Install npm dependencies
+        working-directory: v2
+        run: npm ci --legacy-peer-deps
+
+      - name: Build debug binary
+        working-directory: v2
+        run: npx tauri build --debug --no-bundle
+
+      - name: Run E2E tests (Phase A — deterministic)
+        working-directory: v2
+        env:
+          BTERMINAL_TEST: '1'
+          SKIP_BUILD: '1'
+        run: |
+          xvfb-run --auto-servernum --server-args="-screen 0 1920x1080x24" \
+            npx wdio tests/e2e/wdio.conf.js \
+            --spec tests/e2e/specs/bterminal.test.ts \
+            --spec tests/e2e/specs/agent-scenarios.test.ts
+
+      - name: Run E2E tests (Phase B — multi-project)
+        if: success()
+        working-directory: v2
+        env:
+          BTERMINAL_TEST: '1'
+          SKIP_BUILD: '1'
+        run: |
+          xvfb-run --auto-servernum --server-args="-screen 0 1920x1080x24" \
+            npx wdio tests/e2e/wdio.conf.js \
+            --spec tests/e2e/specs/phase-b.test.ts
+
+      # LLM-judged tests only run when API key is available (manual/dispatch)
+      - name: Run E2E tests (Phase B — LLM-judged)
+        if: success() && env.ANTHROPIC_API_KEY != ''
+        working-directory: v2
+        env:
+          BTERMINAL_TEST: '1'
+          SKIP_BUILD: '1'
+          ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
+        run: |
+          xvfb-run --auto-servernum --server-args="-screen 0 1920x1080x24" \
+            npx wdio tests/e2e/wdio.conf.js \
+            --spec tests/e2e/specs/phase-b.test.ts
+
+      - name: Upload test results
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: e2e-results
+          path: v2/test-results/
+          if-no-files-found: ignore