feat: implement url cleaner tool, local storage persistence and extension integration

src/composables/useExtension.js

@@ -0,0 +1,79 @@
+import { ref, onMounted, onUnmounted } from 'vue'
+
+export function useExtension() {
+  const isExtensionReady = ref(false)
+  const isListening = ref(false)
+  const lastClipboardText = ref('')
+  let extensionCheckInterval = null
+  let lastPongTime = Date.now()
+
+  const PING_INTERVAL = 200
+  const TIMEOUT_THRESHOLD = 1000
+
+  const handleMessage = (event) => {
+    if (event.source !== window) return
+
+    if (event.data.type === 'TOOLS_APP_EXTENSION_READY' || event.data.type === 'TOOLS_APP_PONG') {
+      isExtensionReady.value = true
+      lastPongTime = Date.now()
+    }
+
+    if (event.data.type === 'TOOLS_APP_CLIPBOARD_UPDATE') {
+      const text = event.data.content
+      // Only update if listening
+      if (isListening.value && text) {
+        lastClipboardText.value = text
+      }
+    }
+  }
+
+  const startWatchdog = () => {
+    extensionCheckInterval = setInterval(() => {
+      window.postMessage({ type: 'TOOLS_APP_PING' }, '*')
+      if (Date.now() - lastPongTime > TIMEOUT_THRESHOLD) {
+         isExtensionReady.value = false
+      }
+    }, PING_INTERVAL)
+  }
+
+  const startListening = () => {
+    window.postMessage({ type: 'TOOLS_APP_START_SNIFFING' }, '*')
+    isListening.value = true
+  }
+
+  const stopListening = () => {
+    window.postMessage({ type: 'TOOLS_APP_STOP_SNIFFING' }, '*')
+    isListening.value = false
+  }
+
+  const writeClipboard = (text) => {
+    // Send to extension (background -> offscreen -> clipboard)
+    window.postMessage({ type: 'TOOLS_APP_CLIPBOARD_WRITE', content: text }, '*')
+    // Update local state to avoid echo loop if we are listening
+    lastClipboardText.value = text
+  }
+
+  onMounted(() => {
+    window.addEventListener('message', handleMessage)
+    // Initial check
+    window.postMessage({ type: 'TOOLS_APP_INIT' }, '*')
+    startWatchdog()
+  })
+
+  onUnmounted(() => {
+    if (isListening.value) {
+      stopListening()
+    }
+    if (extensionCheckInterval) clearInterval(extensionCheckInterval)
+    window.removeEventListener('message', handleMessage)
+  })
+
+  return {
+    isExtensionReady,
+    isListening,
+    lastClipboardText,
+    startListening,
+    stopListening,
+    writeClipboard
+  }
+}