fix(calls): harden ML denoise shim against static; fix lint/format

ML noise suppression produced loud static on real calls. RNNoise requires
mono 48kHz float input; feeding it stereo or wrong-rate data is the classic
cause of that static. Harden the shim:
- request mono (channelCount:1) + 48kHz capture
- run a 48kHz AudioContext and BAIL to the raw mic if the browser won't
  give a true 48kHz context (wrong-rate data -> static)
- force the worklet node to explicit mono in/out
- use the non-SIMD rnnoise.wasm (SIMD build artifacts on some GPUs)
- share one AudioContext across captures

Also fix the two CI-blocking eslint errors (unused vars in UrlPreviewCard
and useLocalMessageSearch) and apply repo-wide prettier formatting so
check:eslint and check:prettier pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/components/seasonal/SeasonalEffect.tsx

@@ -109,9 +109,7 @@ function HalloweenOverlay({ reduced }: { reduced: boolean }) {
                 height: `${size}px`,
                 borderRadius: '50%',
                 backgroundColor: isOrange ? 'rgba(255,100,0,0.75)' : 'rgba(160,0,255,0.7)',
-                boxShadow: isOrange
-                  ? '0 0 8px rgba(255,100,0,0.5)'
-                  : '0 0 8px rgba(160,0,255,0.5)',
+                boxShadow: isOrange ? '0 0 8px rgba(255,100,0,0.5)' : '0 0 8px rgba(160,0,255,0.5)',
                 animation: `${animSeasonFall} ${duration}s ease-in ${delay}s infinite`,
               }}
             />
@@ -379,8 +377,9 @@ function LunarNewYearOverlay({ reduced }: { reduced: boolean }) {
               position: 'absolute',
               left: `${left}%`,
               top: `${top}%`,
-              animation:
-                reduced ? 'none' : `${animBob} ${duration}s ease-in-out ${delay}s infinite`,
+              animation: reduced
+                ? 'none'
+                : `${animBob} ${duration}s ease-in-out ${delay}s infinite`,
             }}
           >
             <div
@@ -419,10 +418,9 @@ function LunarNewYearOverlay({ reduced }: { reduced: boolean }) {
                 height: '14px',
                 backgroundColor: '#ffd700',
                 margin: '0 auto',
-                animation:
-                  reduced
-                    ? 'none'
-                    : `${animTasselSway} ${duration * 0.6}s ease-in-out ${delay}s infinite`,
+                animation: reduced
+                  ? 'none'
+                  : `${animTasselSway} ${duration * 0.6}s ease-in-out ${delay}s infinite`,
                 transformOrigin: 'top center',
               }}
             />
@@ -789,8 +787,7 @@ export function SeasonalPreview({ theme }: { theme: SeasonTheme }) {
 export function SeasonalEffect() {
   const settings = useAtomValue(settingsAtom);
   const reduced =
-    typeof window !== 'undefined' &&
-    window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+    typeof window !== 'undefined' && window.matchMedia('(prefers-reduced-motion: reduce)').matches;
 
   const theme = useMemo<SeasonTheme | null>(() => {
     const override = settings.seasonalThemeOverride ?? 'auto';