feat: add problem detection framework for common problems (#2412)

Introduces a ProblemManager that detects and surfaces actionable issues
(stale config, legacy frigate-hass-card resources, slow/failed streams)
via status bar indicators and notification popups with fix actions.

src/card-controller/config/config-manager.ts

@@ -28,7 +28,6 @@ export class ConfigManager {
   private _overriddenConfig: AdvancedCameraCardConfig | null = null;
   private _rawConfig: RawAdvancedCameraCardConfig | null = null;
   private _cardWideConfig: CardWideConfig | null = null;
-  private _upgradeable = false;
   private _overridesManager = new OverridesManager(() => this._processOverrideConfig());
 
   constructor(api: CardConfigAPI) {
@@ -55,22 +54,17 @@ export class ConfigManager {
     return this._rawConfig;
   }
 
-  public isUpgradeable(): boolean {
-    return this._upgradeable;
-  }
-
   public setConfig(inputConfig?: RawAdvancedCameraCardConfig): void {
     if (!inputConfig) {
       throw new Error(localize('error.invalid_configuration'));
     }
 
     const parseResult = advancedCameraCardConfigSchema.safeParse(inputConfig);
-    this._upgradeable = isConfigUpgradeable(inputConfig);
 
     if (!parseResult.success) {
       const hint = getParseError(parseResult.error);
       let upgradeMessage = '';
-      if (this._upgradeable) {
+      if (isConfigUpgradeable(inputConfig)) {
         upgradeMessage = `${localize('error.upgrade_available')}. `;
       }
       throw new Error(