feat(ui): add icons and ticker marquee

Why:
- Improve UI readability with consistent iconography
- Make the top status ticker behave like a real marquee

What:
- Add inline SVG icon set and apply to common actions
- Replace ticker animation with vanilla-marquee + controlled pause
- Document Caddy SSE headers in README
- Add vanilla-marquee dependency

Author: llampwall

README.md

@@ -71,9 +71,29 @@ If UI assets are not built, use the Vite dev server as described above.
 Notes:
 - Start the backend before using the UI: run `pnpm start`.
 - If using HTTPS via Caddy, run `caddy run --config P:\software\caddy\Caddyfile` in a separate terminal.
+- For SSE stability, add no-buffer headers in Caddy (example below).
 - The app still needs a valid token in localStorage. If you have not set one, open the UI once with `?token=...` first.
 - Share drafts are stored locally and survive refresh until sent or cleared.
 
+Caddy SSE headers example:
+```
+central-command:443 {
+  tls internal
+
+  @sse path /runs/*/stream
+  header @sse {
+    Cache-Control "no-cache"
+    X-Accel-Buffering "no"
+  }
+
+  reverse_proxy 127.0.0.1:7777
+}
+
+http://central-command {
+  redir https://{host}{uri}
+}
+```
+
 ## Concepts
 
 - **Workspaces**: repo profiles (not conversations). Fields include `title`, `repo_path`, `notify_policy`, `default_thread_id`, and `test_command_override`.

apps/ui/package.json

@@ -9,7 +9,9 @@
     "preview": "vite preview",
     "typecheck": "tsc -p tsconfig.json --noEmit"
   },
-  "dependencies": {},
+  "dependencies": {
+    "vanilla-marquee": "^1.1.2"
+  },
   "devDependencies": {
     "dotenv": "^16.4.5",
     "typescript": "^5.6.2",