Replaced a hardcoded `rgba` shadow with the design token `var(--shadow-lg)` in `DesktopLaunchGate`, added a regression test to catch raw `rgba` usage in component CSS, and removed an accidental changeset since the fix is dashboard-internal and doesn't require a published release.
Fusion-Task-Id: FN-5126
Adds a "Connection" submenu with a "Change Launch Mode…" item that lets
users switch between Run Locally and Connect to Remote after the initial
chooser. The menu sends shell:reset-desktop-mode-request to the renderer;
the dashboard's DesktopLaunchGate listens, calls the new
shell:resetDesktopMode IPC (clears hasCompletedModeSelection, stops the
embedded runtime), strips the cached serverBaseUrl/shellMode query params,
and reloads so the gate re-prompts.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Wrap <App /> in a DesktopLaunchGate that runs only inside the Electron shell.
On first run it shows a chooser (Run Locally / Connect Remote). On "local"
it calls setDesktopMode("local") so main starts the embedded runtime, polls
shell:getState until localRuntime.state === "running", then reloads with
?serverBaseUrl=http://127.0.0.1:<port> so the dashboard's API calls route
to the embedded server (file:// origins can't resolve relative /api). On
"remote" it opens the existing connection manager. Replaces the dead-end
"can't reach backend" landing in the packaged desktop app.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
