feat: backup/restore, user profile popover, image compress, video blur, wake lock

- backup/restore dialog + user profile popover components
- image compression, video blur, wake lock utilities
- message cache + conversation messages hook refinements
- call context, active speakers, screen share dialog tweaks
- audio + screen share settings persistence
- refreshed app icons (smaller sizes) across all platforms

apps/desktop/src/lib/screenShareSettings.ts

@@ -24,12 +24,18 @@ export interface ScreenShareSettings {
   displaySurface: DisplaySurfaceHint;
   // User-chosen framerate. `null` falls back to preset's default.
   framerateOverride: number | null;
+  // Include system audio ("go live" style). On some hosts getDisplayMedia
+  // can't capture system audio (macOS without special entitlements, some
+  // Linux setups). If the browser ignores the `audio: true` request we
+  // silently fall through to a video-only share.
+  includeSystemAudio: boolean;
 }
 
 const DEFAULTS: ScreenShareSettings = {
   preset: 'auto',
   displaySurface: null,
   framerateOverride: null,
+  includeSystemAudio: false,
 };
 
 export interface PresetParams {
@@ -121,6 +127,10 @@ function read(): ScreenShareSettings {
         typeof parsed.framerateOverride === 'number' && parsed.framerateOverride > 0
           ? parsed.framerateOverride
           : DEFAULTS.framerateOverride,
+      includeSystemAudio:
+        typeof parsed.includeSystemAudio === 'boolean'
+          ? parsed.includeSystemAudio
+          : DEFAULTS.includeSystemAudio,
     };
     return cached;
   } catch {