Replace mock Agent Shell overlay with inline xterm PTY and dock/expand UX.

Uses a local-operator WebSocket bash session, keeps the map interactive, and SNAP docks the shell back into Mesh Chat instead of a floating blurred panel.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/package-lock.json

@@ -11,6 +11,8 @@
         "@mapbox/point-geometry": "^1.1.0",
         "@tauri-apps/plugin-process": "^2.3.1",
         "@tauri-apps/plugin-updater": "^2.10.1",
+        "@xterm/addon-fit": "^0.11.0",
+        "@xterm/xterm": "^6.0.0",
         "framer-motion": "^12.38.0",
         "hls.js": "^1.6.15",
         "lucide-react": "^0.575.0",
@@ -3251,6 +3253,21 @@
         "url": "https://opencollective.com/vitest"
       }
     },
+    "node_modules/@xterm/addon-fit": {
+      "version": "0.11.0",
+      "resolved": "https://registry.npmjs.org/@xterm/addon-fit/-/addon-fit-0.11.0.tgz",
+      "integrity": "sha512-jYcgT6xtVYhnhgxh3QgYDnnNMYTcf8ElbxxFzX0IZo+vabQqSPAjC3c1wJrKB5E19VwQei89QCiZZP86DCPF7g==",
+      "license": "MIT"
+    },
+    "node_modules/@xterm/xterm": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/@xterm/xterm/-/xterm-6.0.0.tgz",
+      "integrity": "sha512-TQwDdQGtwwDt+2cgKDLn0IRaSxYu1tSUjgKarSDkUM0ZNiSRXFpjxEsvc/Zgc5kq5omJ+V0a8/kIM2WD3sMOYg==",
+      "license": "MIT",
+      "workspaces": [
+        "addons/*"
+      ]
+    },
     "node_modules/acorn": {
       "version": "8.16.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-8.16.0.tgz",
@@ -7374,7 +7391,6 @@
       "version": "8.5.15",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.15.tgz",
       "integrity": "sha512-FfR8sjd4em2T6fb3I2MwAJU7HWVMr9zba+enmQeeWFfCbm+UOC/0X4DS8XtpUTMwWMGbjKYP7xjfNekzyGmB3A==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",