feat(web): add Cloudflare Quick Tunnel support for remote access (#85)

* feat(web): add Cloudflare Quick Tunnel support for remote access

Implement --try-cf-tunnel flag that creates a temporary public URL
routing to the locally running server via cloudflared.

Features:
- Auto-detect and spawn cloudflared subprocess
- Extract and display *.trycloudflare.com URL
- Proper cleanup on server shutdown
- Dynamic port handling (tunnel routes to actual listening port)
- Isolated HOME dir to avoid config conflicts
- Installation help and limitations warning

* docs: add Cloudflare tunnel feature to README

- Document --try-cf-tunnel flag in CLI examples
- Add Cloudflare Quick Tunnel to Web/PWA features

* docs: add cloudflared as prerequisite for --try-cf-tunnel

* feat(web): auto-generate password for Cloudflare tunnel

When using --try-cf-tunnel without --ui-password, automatically generate
a secure random password to protect the publicly exposed service.

Features:
- 16-character random password (easy to read, no ambiguous characters)
- Password is displayed after tunnel is established
- Warning to save the password (not shown again)
- Works in both foreground and daemon modes
- Uses same password for subsequent restarts (stored in instance file)

* fix(web): improve Cloudflare tunnel UX and fix spawn ENAMETOOLONG

- Generate and display password before tunnel starts (green colored)
- Display tunnel URL in cyan via onTunnelReady callback
- Fix ENAMETOOLONG by using env:undefined instead of copying process.env
- Pass tryCfTunnel flag from CLI to main function
- Remove duplicate tunnel URL output
- Update warning message to reflect password protection
- Change start script to use CLI wrapper for proper initialization

---------

Co-authored-by: aptdnfapt <197602950+aptdnfapt@users.noreply.github.com>

packages/web/package.json

@@ -19,7 +19,7 @@
     "build:watch": "vite build --watch",
     "type-check": "tsc --noEmit",
     "lint": "eslint \"./src/**/*.{ts,tsx}\" --config ../../eslint.config.js",
-    "start": "node server/index.js"
+    "start": "node bin/cli.js serve"
   },
   "dependencies": {
     "@fontsource/ibm-plex-mono": "^5.2.7",