feat: add URL content extraction for AI diagram generation

lib/i18n/dictionaries/en.json

@@ -51,7 +51,8 @@
         "badResponse": "Bad response",
         "clickToEdit": "Click to edit",
         "editMessage": "Edit message",
-        "saveAndSubmit": "Save & Submit"
+        "saveAndSubmit": "Save & Submit",
+        "ExtractURL": "Extract from URL"
     },
     "examples": {
         "title": "Create diagrams with AI",
@@ -186,6 +187,13 @@
         "chars": "chars",
         "removeFile": "Remove file"
     },
+    "pdf": {
+        "title": "Extract Content from URL",
+        "description": "Paste a URL to extract and analyze its content",
+        "Extracting": "Extracting...",
+        "extract": "Extract",
+        "Cancel": "Cancel"
+    },
     "reasoning": {
         "thinking": "Thinking...",
         "thoughtFor": "Thought for {duration} seconds",