Notices and status bar improvements (#24459)

* Notice and status bar improvements

Status bar problems added in the same pass got the same `Date.now()` id and overwrote each other, so usually only one showed. Messages now fall back to their text as the id. The desktop status bar shows the most severe message with a count of the rest that opens a popover listing all of them, and the mobile drawer stacks them vertically instead of placing them side by side.

Dismissing a notice hid it for good, so a detector that restarted again after a dismissal was never shown. Dismiss is replaced by acknowledge, which hides a notice until it happens again, and mute, which hides it permanently. Kinds that never repeat (config and stream checks, the update notice) can only be muted. `reopen_at_count` is removed since acknowledge covers the failed login case.

* move camera CPU warnings to notices

High ffmpeg and detect CPU warnings sat in the status bar with no way to dismiss them. They're now `ffmpeg_high_cpu` and `detect_high_cpu` notices, raised per episode by the same tracker as skipped detections. Also stop failed login attempts held from before an acknowledgement from reopening the notice.

* fix mypy and handle missing cpu stats in notices

web/e2e/helpers/api-mocker.ts

@@ -49,7 +49,7 @@ export interface ApiMockOverrides {
   };
   users?: { username: string; role: string }[];
   notices?: unknown[];
-  dismissedChecks?: unknown[];
+  mutedChecks?: unknown[];
   /** camera name to the ffprobe entries returned for `paths=camera:<name>` */
   ffprobe?: Record<string, unknown[]>;
 }
@@ -238,8 +238,8 @@ export class ApiMocker {
     await this.page.route("**/api/notices", (route) =>
       route.fulfill({ json: overrides?.notices ?? [] }),
     );
-    await this.page.route("**/api/notices/dismissed_checks", (route) =>
-      route.fulfill({ json: overrides?.dismissedChecks ?? [] }),
+    await this.page.route("**/api/notices/muted_checks", (route) =>
+      route.fulfill({ json: overrides?.mutedChecks ?? [] }),
     );
 
     // Users. GET lists them; POST/PUT (create, password) just succeed, so