Add header quick links with CRUD management and icon enhancements

- Add LinkConfig model and links field to settings
- Add CRUD API endpoints for links (list/create/update/delete)
- Add Links management tab in WebUI with add/edit/delete dialogs
- Add live icon preview in Link and Script dialog forms
- Show MDI icons inline in Quick Actions cards, Scripts table, Links table
- Add broadcast_links_changed WebSocket event for live updates
- Add EN/RU translations for all links management strings

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

media_server/config_manager.py

@@ -8,7 +8,7 @@ from typing import Optional
 
 import yaml
 
-from .config import CallbackConfig, MediaFolderConfig, ScriptConfig, settings
+from .config import CallbackConfig, LinkConfig, MediaFolderConfig, ScriptConfig, settings
 
 logger = logging.getLogger(__name__)
 
@@ -387,6 +387,70 @@ class ConfigManager:
 
             logger.info(f"Media folder '{folder_id}' deleted from config")
 
+    def add_link(self, name: str, config: LinkConfig) -> None:
+        """Add a new link to config."""
+        with self._lock:
+            if not self._config_path.exists():
+                data = {}
+            else:
+                with open(self._config_path, "r", encoding="utf-8") as f:
+                    data = yaml.safe_load(f) or {}
+
+            if "links" in data and name in data["links"]:
+                raise ValueError(f"Link '{name}' already exists")
+
+            if "links" not in data:
+                data["links"] = {}
+            data["links"][name] = config.model_dump(exclude_none=True)
+
+            self._config_path.parent.mkdir(parents=True, exist_ok=True)
+            with open(self._config_path, "w", encoding="utf-8") as f:
+                yaml.dump(data, f, default_flow_style=False, sort_keys=False)
+
+            settings.links[name] = config
+            logger.info(f"Link '{name}' added to config")
+
+    def update_link(self, name: str, config: LinkConfig) -> None:
+        """Update an existing link."""
+        with self._lock:
+            if not self._config_path.exists():
+                raise ValueError(f"Config file not found: {self._config_path}")
+
+            with open(self._config_path, "r", encoding="utf-8") as f:
+                data = yaml.safe_load(f) or {}
+
+            if "links" not in data or name not in data["links"]:
+                raise ValueError(f"Link '{name}' does not exist")
+
+            data["links"][name] = config.model_dump(exclude_none=True)
+
+            with open(self._config_path, "w", encoding="utf-8") as f:
+                yaml.dump(data, f, default_flow_style=False, sort_keys=False)
+
+            settings.links[name] = config
+            logger.info(f"Link '{name}' updated in config")
+
+    def delete_link(self, name: str) -> None:
+        """Delete a link from config."""
+        with self._lock:
+            if not self._config_path.exists():
+                raise ValueError(f"Config file not found: {self._config_path}")
+
+            with open(self._config_path, "r", encoding="utf-8") as f:
+                data = yaml.safe_load(f) or {}
+
+            if "links" not in data or name not in data["links"]:
+                raise ValueError(f"Link '{name}' does not exist")
+
+            del data["links"][name]
+
+            with open(self._config_path, "w", encoding="utf-8") as f:
+                yaml.dump(data, f, default_flow_style=False, sort_keys=False)
+
+            if name in settings.links:
+                del settings.links[name]
+            logger.info(f"Link '{name}' deleted from config")
+
 
 # Global config manager instance
 config_manager = ConfigManager()