LLeMbas Desktop: the server in a window, the CLI's agent on this computer

Tauri 2, no Node. A first-run page chooses the server; then the window is
the server's web UI, whose pages get no IPC. The bundled LLeMbas CLI
(fetched and signature-checked by scripts/fetch-cli.sh) links the computer
with 'lembas login --json' and runs as 'lembas service' while the app runs.
A tray menu starts and stops it. Linux packages from GitHub Actions on a tag.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ui/logo-mark.svg

@@ -0,0 +1,6 @@
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+     shape-rendering="crispEdges" role="img" aria-label="LLeMbas">
+  <title>LLeMbas</title>
+  <desc>A pixel mallorn leaf with a dark one-pixel edge.</desc>
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