feat(shell): integrate Hyper-like terminal technologies (WebGL, search, unicode11, image)

Add xterm addons from Vercel Hyper terminal: WebGL renderer with DOM
fallback, search bar (Ctrl+Shift+F), Unicode 11 grapheme support, and
inline image protocol. All existing functionality preserved.

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

web/package.json

@@ -9,7 +9,11 @@
   },
   "dependencies": {
     "@xterm/addon-fit": "^0.11.0",
+    "@xterm/addon-image": "^0.10.0-beta.203",
+    "@xterm/addon-search": "^0.17.0-beta.203",
+    "@xterm/addon-unicode11": "^0.10.0-beta.203",
     "@xterm/addon-web-links": "^0.12.0",
+    "@xterm/addon-webgl": "^0.20.0-beta.202",
     "@xterm/xterm": "^6.0.0",
     "lucide-react": "^1.8.0",
     "react": "^19.2.5",