feat: relaunch button in right panel + drag-resize window

- package.json: add relaunchButtons (runAI) for right-panel shortcut
- main.ts: setRelaunchData + RESIZE_WINDOW handler (figma.ui.resize)
- ui.tsx: useWindowResize native drag handle + expand/collapse toggle
- .gitignore: exclude _reference/ (temp old-plugin copy)
- IDEA.md: commit+push to Gitea is mandatory workflow

package.json

@@ -22,6 +22,13 @@
     "id": "ai-plugin-mvp",
     "name": "AI assistant (MVP)",
     "main": "src/main.ts",
-    "ui": "src/ui.tsx"
+    "ui": "src/ui.tsx",
+    "relaunchButtons": {
+      "runAI": {
+        "name": "Запустить AI assistant",
+        "main": "src/main.ts",
+        "ui": "src/ui.tsx"
+      }
+    }
   }
 }