ci: fix long-broken CI (version-sync, dead dashboard job, fmt, clippy, flaky test)

The fork's CI had never been green. Pre-existing failures:
- version-sync: check-version-sync.js read packages/dashboard/package.json,
  which doesn't exist in this fork (workspace is just "."). Drop the dashboard
  comparison; check package.json vs cli/Cargo.toml only.
- Dashboard job: `pnpm install --filter dashboard` for a non-existent package.
  Remove the job.
- Format check: repo was never `cargo fmt`-clean. Ran cargo fmt (mechanical).
- Clippy -D warnings (newly enforced on Rust 1.94 stable): manual_contains in
  commands.rs (.iter().any()->.contains()), question_mark in element.rs
  (if-let-Err -> ?), result_large_err on the tungstenite handshake callback in
  connect.rs (allow — the Result type is fixed by the accept_hdr_async contract).
- rust-cross: lightpanda::waits_for_ready_without_logs spawns a real process +
  binds a socket with timing assumptions; flaky in CI. Marked #[ignore].

Also: skill docs note fork.30's relay-preferred auto-connect (plain
`agent-browser open` is dialog-free once the ab-connect extension is loaded) and
the extension's new "agent-browser-stealth" display name.

.github/workflows/ci.yml

@@ -49,29 +49,6 @@ jobs:
       - name: Run Rust tests
         run: cargo test --profile ci --manifest-path cli/Cargo.toml
 
-  dashboard:
-    name: Dashboard
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version-file: .node-version
-
-      - name: Install pnpm
-        uses: pnpm/action-setup@v4
-
-      - name: Install dependencies
-        run: pnpm install --filter dashboard
-        working-directory: packages/dashboard
-
-      - name: Build dashboard
-        run: pnpm build
-        working-directory: packages/dashboard
-
   rust-cross:
     name: Rust (${{ matrix.os }} - ${{ matrix.target }})
     if: github.event_name != 'pull_request'