feat: add interactive web terminal for bot containers (#232)

* feat(terminal): add interactive web terminal for bot containers

Add WebSocket-based terminal endpoint (/container/terminal/ws) that
provides a full PTY shell session inside the bot's MCP container.
Extend the gRPC proto with pty and resize fields, implement PTY exec
on the container side using creack/pty, and add an xterm.js-based
terminal component in the frontend bot detail page.

* chore: add /mcp in .gitignore

* feat(terminal): add multi-tab support, localStorage cache, and reactivity fixes

- Support unlimited terminal tabs with add/close/switch
- Cache terminal content to localStorage via SerializeAddon for session persistence
- Use shallowReactive for tab objects to ensure status updates trigger UI reactivity
- Fix listener leak by tracking and disposing onData/onResize on reconnect
- Fix bottom clipping by using inset offsets instead of padding

pnpm-lock.yaml

@@ -158,6 +158,15 @@ importers:
       '@vueuse/core':
         specifier: ^14.1.0
         version: 14.1.0(vue@3.5.26(typescript@5.9.3))
+      '@xterm/addon-fit':
+        specifier: ^0.11.0
+        version: 0.11.0
+      '@xterm/addon-serialize':
+        specifier: ^0.14.0
+        version: 0.14.0
+      '@xterm/xterm':
+        specifier: ^6.0.0
+        version: 6.0.0
       dotenv:
         specifier: ^17.2.3
         version: 17.2.3
@@ -2562,6 +2571,15 @@ packages:
     peerDependencies:
       vue: ^3.5.0
 
+  '@xterm/addon-fit@0.11.0':
+    resolution: {integrity: sha512-jYcgT6xtVYhnhgxh3QgYDnnNMYTcf8ElbxxFzX0IZo+vabQqSPAjC3c1wJrKB5E19VwQei89QCiZZP86DCPF7g==}
+
+  '@xterm/addon-serialize@0.14.0':
+    resolution: {integrity: sha512-uteyTU1EkrQa2Ux6P/uFl2fzmXI46jy5uoQMKEOM0fKTyiW7cSn0WrFenHm5vO5uEXX/GpwW/FgILvv3r0WbkA==}
+
+  '@xterm/xterm@6.0.0':
+    resolution: {integrity: sha512-TQwDdQGtwwDt+2cgKDLn0IRaSxYu1tSUjgKarSDkUM0ZNiSRXFpjxEsvc/Zgc5kq5omJ+V0a8/kIM2WD3sMOYg==}
+
   accepts@2.0.0:
     resolution: {integrity: sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==}
     engines: {node: '>= 0.6'}
@@ -7426,6 +7444,12 @@ snapshots:
     dependencies:
       vue: 3.5.26(typescript@5.9.3)
 
+  '@xterm/addon-fit@0.11.0': {}
+
+  '@xterm/addon-serialize@0.14.0': {}
+
+  '@xterm/xterm@6.0.0': {}
+
   accepts@2.0.0:
     dependencies:
       mime-types: 3.0.2