ui(vu): narrower 44deg swing, peak-based level, faster response; mini progress bar fix

- VU needle swings -22..+22deg instead of -45..+45 for a more realistic VU look
- Switch from RMS to peak frequency reading so the needle catches musical hits
- Faster attack (0.7) and release (0.25) so it swings rather than pinning
- Replace explicit grid lines with subtle repeating-conic-gradient ticks
- Scope mini progress bar styles to .mini-player; taller (3px), clickable

media_server/static/css/styles.css

@@ -5377,12 +5377,17 @@ body.visualizer-active .vinyl-stage .spectrogram-canvas {
 }
 #mini-current-time { color: var(--copper); font-weight: 500; }
 
-.mini-progress-bar {
-    height: 2px;
+.mini-player .mini-progress-bar {
+    flex: 0 0 auto;
+    height: 3px;
     background: var(--rule-strong);
     border-radius: 0;
+    cursor: pointer;
+    position: relative;
+    min-width: 0;
 }
-.mini-progress-fill {
+.mini-player .mini-progress-fill {
+    height: 100%;
     background: var(--copper);
     box-shadow: 0 0 8px var(--copper-glow);
     border-radius: 0;
@@ -7062,33 +7067,10 @@ body.audio-spectrum-live .now-playing .spectrum span {
     content: "";
     position: absolute;
     inset: 0;
-    /* 11 grid lines (every 9°) drawn ONLY in the needle's -45°..+45°
-       swing range. No mask — the conic-gradient is explicitly transparent
-       outside the 90° active wedge so the leftmost line aligns with the
-       needle's rest position (proper zero). */
-    background: conic-gradient(from 315deg at 50% 100%,
-        rgba(242, 235, 220, 0.18) 0deg 0.5deg,
-        transparent 0.5deg 9deg,
-        rgba(242, 235, 220, 0.18) 9deg 9.5deg,
-        transparent 9.5deg 18deg,
-        rgba(242, 235, 220, 0.18) 18deg 18.5deg,
-        transparent 18.5deg 27deg,
-        rgba(242, 235, 220, 0.18) 27deg 27.5deg,
-        transparent 27.5deg 36deg,
-        rgba(242, 235, 220, 0.18) 36deg 36.5deg,
-        transparent 36.5deg 45deg,
-        rgba(242, 235, 220, 0.25) 45deg 45.5deg,        /* slightly brighter centre line at 0 */
-        transparent 45.5deg 54deg,
-        rgba(242, 235, 220, 0.18) 54deg 54.5deg,
-        transparent 54.5deg 63deg,
-        rgba(242, 235, 220, 0.18) 63deg 63.5deg,
-        transparent 63.5deg 72deg,
-        rgba(242, 235, 220, 0.18) 72deg 72.5deg,
-        transparent 72.5deg 81deg,
-        rgba(242, 235, 220, 0.18) 81deg 81.5deg,
-        transparent 81.5deg 90deg,
-        rgba(242, 235, 220, 0.18) 90deg 90.5deg,
-        transparent 90.5deg 360deg);
+    background: repeating-conic-gradient(from 195deg at 50% 100%,
+        transparent 0deg 4deg,
+        rgba(242, 235, 220, 0.08) 4deg 5deg,
+        transparent 5deg 9deg);
 }
 .now-playing .vu-meter::after {
     content: "VU";
@@ -7109,8 +7091,7 @@ body.audio-spectrum-live .now-playing .spectrum span {
     height: 88%;
     background: linear-gradient(to top, var(--copper) 0%, var(--copper-hi) 70%, var(--ink) 100%);
     transform-origin: bottom center;
-    /* Rest at full-left like a real VU meter at silence (-∞ dB) */
-    transform: rotate(-45deg);
+    transform: rotate(-22deg);
     transition: transform 350ms var(--ease);
     box-shadow: 0 0 8px var(--copper-glow);
 }

media_server/static/js/player.js

@@ -763,10 +763,10 @@ export function updateUI(status) {
         dom.volumeDisplay.textContent = `${status.volume}%`;
         dom.miniVolumeSlider.value = status.volume;
         dom.miniVolumeDisplay.textContent = `${status.volume}%`;
-        // VU needle: map 0-100 volume to -45deg..+45deg rotation.
+        // VU needle: map 0-100 volume to -22deg..+22deg rotation.
         const needle = document.getElementById('vuNeedle');
         if (needle) {
-            const deg = -45 + (status.volume / 100) * 90;
+            const deg = -22 + (status.volume / 100) * 44;
             needle.style.transform = `rotate(${deg}deg)`;
         }
         // Editorial VU readout: VOL XX% / OUT (SYS or MUTED)
@@ -802,22 +802,19 @@ export function updateUI(status) {
 // slider position so the needle still looks alive.
 let vuWobbleHandle = null;
 let vuWobbleStart = 0;
-let vuLevelSmoothed = 0;     // Smoothed RMS of recent frequency frames
-const VU_LEVEL_ATTACK = 0.55; // How fast needle climbs to a peak
-const VU_LEVEL_RELEASE = 0.12; // How fast it falls back
+let vuLevelSmoothed = 0;
+const VU_LEVEL_ATTACK = 0.7;   // Fast climb so the needle catches musical hits
+const VU_LEVEL_RELEASE = 0.25; // Faster fall so it swings between hits, not pins
 
 function readAudioLevel() {
-    // frequencyData is the WS-driven FFT payload from player.js scope.
     if (!frequencyData || !frequencyData.frequencies) return null;
     const bins = frequencyData.frequencies;
     if (!bins.length) return null;
-    let sumSq = 0;
-    // Skip the very lowest bin (DC + sub-rumble) for cleaner level.
-    for (let i = 1; i < bins.length; i++) sumSq += bins[i] * bins[i];
-    const rms = Math.sqrt(sumSq / (bins.length - 1));
-    // The values are in 0..1 from the backend; gain a touch so quieter
-    // tracks still swing the needle.
-    return Math.min(1, rms * 1.6);
+    let peak = 0;
+    for (let i = 1; i < bins.length; i++) {
+        if (bins[i] > peak) peak = bins[i];
+    }
+    return Math.min(1, peak * 1.4);
 }
 
 function startVuWobble() {
@@ -839,11 +836,9 @@ function startVuWobble() {
                 const wanted = audioLevel * (vol / 100);
                 const k = wanted > vuLevelSmoothed ? VU_LEVEL_ATTACK : VU_LEVEL_RELEASE;
                 vuLevelSmoothed = vuLevelSmoothed * (1 - k) + wanted * k;
-                // Map 0..1 to -45deg..+45deg.
-                target = -45 + vuLevelSmoothed * 90;
+                target = -22 + vuLevelSmoothed * 44;
             } else {
-                // Synthetic fallback: volume-mapped + sine wobble.
-                const base = -45 + (vol / 100) * 90;
+                const base = -22 + (vol / 100) * 44;
                 const mag = Math.max(2, Math.min(14, vol * 0.16));
                 const t = (performance.now() - vuWobbleStart) / 1000;
                 target = base
@@ -864,9 +859,8 @@ function stopVuWobble() {
         vuWobbleHandle = null;
     }
     vuLevelSmoothed = 0;
-    // Settle needle back to the bottom of the swing.
     const needle = document.getElementById('vuNeedle');
-    if (needle) needle.style.transform = 'rotate(-45deg)';
+    if (needle) needle.style.transform = 'rotate(-22deg)';
 }
 
 export function updatePlaybackState(state) {