Add search/mentions commands and fix cookie decryption

- Added `search <query>` command to search tweets
- Added `mentions` command to find @clawdbot mentions
- Fixed Chrome cookie decryption to extract hex values correctly
- Added SearchTimeline query ID (may need updating as Twitter rotates these)

Note: Search endpoints may return 404 if query IDs are outdated

src/lib/cookies.ts

@@ -79,7 +79,15 @@ function decryptCookieValue(encryptedHex: string): string | null {
     let decrypted = decipher.update(encryptedData);
     decrypted = Buffer.concat([decrypted, decipher.final()]);
 
-    return decrypted.toString('utf8');
+    // Chrome v10 cookies have key material prepended before the actual value
+    // Twitter cookies are hex strings, so extract the longest hex sequence
+    const decryptedStr = decrypted.toString('utf8');
+    const hexMatch = decryptedStr.match(/[a-f0-9]{32,}/i);
+    if (hexMatch) {
+      return hexMatch[0];
+    }
+    // Fallback: keep only printable ASCII characters
+    return decryptedStr.replace(/[^\x20-\x7E]/g, '');
   } catch {
     return null;
   }