Add dynamic configuration for more fields (#22295)

* face recognition dynamic config

* lpr dynamic config

* safe changes for birdseye dynamic config

* bird classification dynamic config

* always assign new config to stats emitter to make telemetry fields dynamic

* add wildcard support for camera config updates in config_set

* update restart required fields for global sections

* add test

* fix rebase issue

* collapsible settings sidebar

use the preexisting control available with shadcn's sidebar (cmd/ctrl-B) to give users more space to set masks/zones on smaller screens

* dynamic ffmpeg

* ensure previews dir exists

when ffmpeg processes restart, there's a brief window where the preview frame generation pipeline is torn down and restarted. before these changes, ffmpeg only restarted on crash/stall recovery or full Frigate restart. Now that ffmpeg restarts happen on-demand via config changes, there's a higher chance a frontend request hits the preview_mp4 or preview_gif endpoints during that brief restart window when the directory might not exist yet. The existing os.listdir() call would throw FileNotFoundError without a directory existence check. this fix just checks if the directory exists and returns 404 if not, exactly how preview_thumbnail already handles the same scenario a few lines below

* global ffmpeg section

* clean up

* tweak

* fix test

web/src/utils/configUtil.ts

@@ -54,6 +54,20 @@ export const cameraUpdateTopicMap: Record<string, string> = {
   ui: "ui",
 };
 
+// Sections where global config serves as the default for per-camera config.
+// Global updates to these sections are fanned out to all cameras via wildcard.
+export const globalCameraDefaultSections = new Set([
+  "detect",
+  "objects",
+  "motion",
+  "record",
+  "snapshots",
+  "review",
+  "audio",
+  "notifications",
+  "ffmpeg",
+]);
+
 // ---------------------------------------------------------------------------
 // buildOverrides — pure recursive diff of current vs stored config & defaults
 // ---------------------------------------------------------------------------
@@ -476,6 +490,9 @@ export function prepareSectionSavePayload(opts: {
   if (level === "camera" && cameraName) {
     const topic = cameraUpdateTopicMap[sectionPath];
     updateTopic = topic ? `config/cameras/${cameraName}/${topic}` : undefined;
+  } else if (globalCameraDefaultSections.has(sectionPath)) {
+    const topic = cameraUpdateTopicMap[sectionPath];
+    updateTopic = topic ? `config/cameras/*/${topic}` : `config/${sectionPath}`;
   } else {
     updateTopic = `config/${sectionPath}`;
   }