feat(ext): expose ext meta data to main world

packages/extension/src/entrypoints/main-world.ts

@@ -23,6 +23,10 @@ export default defineUnlistedScript(() => {
 		return _lastId
 	}
 
+	w.PAGE_AGENT_EXT_INSTALLED = true
+	w.PAGE_AGENT_EXT_VERSION = __EXT_VERSION__
+	w.PAGE_AGENT_EXT_CORE_VERSION = __CORE_VERSION__
+
 	w.execute = async (task: string, llmConfig: LLMConfig, hooks?: ExecuteHooks) => {
 		if (typeof task !== 'string') throw new Error('Task must be a string')
 		if (task.trim().length === 0) throw new Error('Task cannot be empty')

packages/extension/src/entrypoints/sidepanel/components/ConfigPanel.tsx

@@ -7,9 +7,6 @@ import { DEMO_API_KEY, DEMO_BASE_URL, DEMO_MODEL } from '@/agent/constants'
 import { Button } from '@/components/ui/button'
 import { Input } from '@/components/ui/input'
 
-declare const __EXT_VERSION__: string
-declare const __CORE_VERSION__: string
-
 interface ConfigPanelProps {
 	config: LLMConfig | null
 	onSave: (config: LLMConfig) => Promise<void>