feat(console): rename to mc-webui, fix change_path, persist transcript

- Rename "meshcli Console" to "mc-webui Console" (modal title + docs).
- Drop redundant "Connected to..." messages; replace intro with a one-line "Type 'help' for available commands." hint.
- Use a teal device-name style so the header label is readable on the dark background.
- Display contact paths with commas (D1,90,05,54) instead of arrows in `contacts` and `path`, matching the standard MeshCore client.
- Fix `change_path`: previously read only args[2] after shlex split, silently writing a 1-byte path. Now joins remaining args, accepts comma/space/continuous-hex, validates hex, auto-deduces hash_size from comma-chunk length (1/2/3-byte hops), and routes through _change_path_async so path_hash_mode is set and the contacts cache is invalidated.
- Update `help` line and add a usage hint for the no-args form.
- Add capped persistent output transcript: GET/POST/DELETE /api/console/output (cap 500 entries). Console restores prior entries (faded) above a divider on open and exposes a trash button to clear it.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

app/device_manager.py

@@ -2784,15 +2784,15 @@ class DeviceManager:
             logger.error(f"discover_path failed: {e}")
             return {'success': False, 'error': str(e)}
 
-    def change_path(self, name_or_key: str, path: str) -> Dict:
-        """Change the path to a contact."""
+    def change_path(self, name_or_key: str, path: str, hash_size: int = 1) -> Dict:
+        """Change the path to a contact. hash_size: 1/2/3 bytes per hop."""
         if not self.is_connected:
             return {'success': False, 'error': 'Device not connected'}
         contact = self.resolve_contact(name_or_key)
         if not contact:
             return {'success': False, 'error': f"Contact not found: {name_or_key}"}
         try:
-            self.execute(self.mc.commands.change_contact_path(contact, path), timeout=10)
+            self.execute(self._change_path_async(contact, path, hash_size=hash_size), timeout=10)
             return {'success': True, 'message': f'Path changed for {contact.get("adv_name", name_or_key)}'}
         except Exception as e:
             logger.error(f"change_path failed: {e}")