fix(ook): fix output panel layout, persist frames, wire global status bar

- Fix double-scroll by switching ookOutputPanel to flex layout
- Keep decoded frames visible after stopping (persist for review)
- Wire global Clear/CSV/JSON status bar buttons to OOK functions
- Hide default output pane in OOK mode (uses own panel)
- Add command display showing the active rtl_433 command
- Add JSON export and auto-scroll support
- Fix 0x prefix stripping in OOK hex decoder
- Fix PWM encoding hint text

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

utils/ook.py

@@ -45,7 +45,11 @@ def decode_ook_frame(hex_data: str) -> dict[str, Any] | None:
         ``byte_count``, and ``bit_count``, or ``None`` on parse failure.
     """
     try:
-        raw = bytes.fromhex(hex_data.replace(' ', ''))
+        cleaned = hex_data.replace(' ', '')
+        # rtl_433 flex decoder prefixes hex with '0x' — strip it
+        if cleaned.startswith(('0x', '0X')):
+            cleaned = cleaned[2:]
+        raw = bytes.fromhex(cleaned)
     except ValueError:
         return None