update the UI/UX for settings

src/renderer/components/BottomBar.tsx

@@ -1,4 +1,4 @@
-import { useEffect, type CSSProperties, type JSX } from 'react'
+import { useEffect, useLayoutEffect, useRef, type CSSProperties, type JSX } from 'react'
 import { useAudioStore } from '../stores/audioStore'
 import { useSettingsStore } from '../stores/settingsStore'
 import { useThemeStore, PRESETS, PRESET_IDS } from '../stores/themeStore'
@@ -17,9 +17,11 @@ const SCOPE_LABELS: Record<ScopeKind, string> = {
 
 interface BottomBarProps {
   onClose: () => void
+  onHeightChange?: (height: number) => void
 }
 
-export default function BottomBar({ onClose }: BottomBarProps): JSX.Element {
+export default function BottomBar({ onClose, onHeightChange }: BottomBarProps): JSX.Element {
+  const rootRef = useRef<HTMLDivElement | null>(null)
 
   const hiddenScopes = useSettingsStore((s) => s.hiddenScopes)
   const toggleScope = useSettingsStore((s) => s.toggleScope)
@@ -50,6 +52,33 @@ export default function BottomBar({ onClose }: BottomBarProps): JSX.Element {
     void refreshDevices()
   }, [refreshBackendSupport, refreshSystemSources, refreshDevices])
 
+  useLayoutEffect(() => {
+    if (!onHeightChange || !rootRef.current) return
+
+    const rootElement = rootRef.current
+    let frameId = 0
+
+    const reportHeight = (): void => {
+      cancelAnimationFrame(frameId)
+      frameId = requestAnimationFrame(() => {
+        onHeightChange(Math.ceil(rootElement.getBoundingClientRect().height))
+      })
+    }
+
+    reportHeight()
+
+    const resizeObserver = new ResizeObserver(() => {
+      reportHeight()
+    })
+
+    resizeObserver.observe(rootElement)
+
+    return () => {
+      cancelAnimationFrame(frameId)
+      resizeObserver.disconnect()
+    }
+  }, [onHeightChange])
+
   const handleSourceChange = async (value: string): Promise<void> => {
     if (value.startsWith('system:')) {
       const sourceId = value.slice('system:'.length)
@@ -84,135 +113,149 @@ export default function BottomBar({ onClose }: BottomBarProps): JSX.Element {
         : 'Idle'
 
   return (
-    <div className="bottom-bar">
-      <section className="bottom-bar__section">
-        <div className="bottom-bar__section-title">Modules</div>
-        <div className="bottom-bar__inline">
-          {SCOPE_KINDS.map((kind) => {
-            const active = !hiddenScopes.has(kind)
-            return (
-              <button
-                key={kind}
-                type="button"
-                className={`settings-chip ${active ? 'is-active' : ''}`.trim()}
-                onClick={() => toggleScope(kind)}
-                title={SCOPE_LABELS[kind]}
-              >
-                {SCOPE_LABELS[kind]}
-              </button>
-            )
-          })}
+    <div className="bottom-bar" ref={rootRef}>
+      <div className="bottom-bar__rail" aria-label="Global settings">
+        <div className="bottom-bar__rail-content">
+          <section className="bottom-bar__section bottom-bar__section--modules">
+            <div className="bottom-bar__section-title">Modules</div>
+            <div className="bottom-bar__section-body">
+              <div className="bottom-bar__inline bottom-bar__inline--chips">
+                {SCOPE_KINDS.map((kind) => {
+                  const active = !hiddenScopes.has(kind)
+                  return (
+                    <button
+                      key={kind}
+                      type="button"
+                      className={`settings-chip ${active ? 'is-active' : ''}`.trim()}
+                      onClick={() => toggleScope(kind)}
+                      title={SCOPE_LABELS[kind]}
+                    >
+                      {SCOPE_LABELS[kind]}
+                    </button>
+                  )
+                })}
+              </div>
+            </div>
+          </section>
+
+          <div className="bottom-bar__divider" />
+
+          <section className="bottom-bar__section bottom-bar__section--theme">
+            <div className="bottom-bar__section-title">Theme</div>
+            <div className="bottom-bar__section-body">
+              <div className="bottom-bar__inline bottom-bar__inline--theme">
+                {PRESET_IDS.map((id) => {
+                  const preset = PRESETS[id]
+                  const active = presetId === id && !customAccent
+                  return (
+                    <button
+                      key={id}
+                      type="button"
+                      className={`settings-swatch ${active ? 'is-active' : ''}`.trim()}
+                      style={{ '--swatch-color': preset.accent } as CSSProperties}
+                      onClick={() => setPreset(id)}
+                      title={preset.name}
+                      aria-label={preset.name}
+                    />
+                  )
+                })}
+                <input
+                  className="settings-accent-input"
+                  type="color"
+                  value={accent}
+                  onChange={(event) => setCustomAccent(event.target.value)}
+                  title="Custom accent color"
+                />
+                {customAccent && (
+                  <button
+                    type="button"
+                    className="settings-chip"
+                    onClick={() => setCustomAccent(null)}
+                  >
+                    Reset
+                  </button>
+                )}
+              </div>
+            </div>
+          </section>
+
+          <div className="bottom-bar__divider" />
+
+          <section className="bottom-bar__section bottom-bar__section--source">
+            <div className="bottom-bar__section-title">Audio Source</div>
+            <div className="bottom-bar__section-body">
+              <div className="bottom-bar__inline">
+                <select
+                  className="settings-control__select"
+                  value={selectedSourceValue}
+                  onChange={(event) => {
+                    void handleSourceChange(event.target.value)
+                  }}
+                >
+                  <optgroup label="Output Devices">
+                    {visibleSystemSources.map((source) => (
+                      <option key={source.id} value={`system:${source.id}`}>
+                        {source.isDefault ? `${source.label} (Default)` : source.label}
+                      </option>
+                    ))}
+                  </optgroup>
+                  {showInputDevices ? (
+                    <optgroup label="Input Devices">
+                      {devices.map((device) => (
+                        <option key={device.deviceId} value={`device:${device.deviceId}`}>
+                          {device.label || `Input ${device.deviceId.slice(0, 8)}`}
+                        </option>
+                      ))}
+                    </optgroup>
+                  ) : null}
+                </select>
+
+                <div className={`settings-status-pill is-${captureStatus}`.trim()}>
+                  <span className="settings-status-pill__dot" />
+                  <span>{indicatorLabel}</span>
+                </div>
+              </div>
+
+              {captureError ? (
+                <div className="settings-error-text bottom-bar__error-text">{captureError}</div>
+              ) : null}
+            </div>
+          </section>
+
+          <div className="bottom-bar__divider" />
+
+          <section className="bottom-bar__section bottom-bar__section--trim">
+            <div className="bottom-bar__section-title">Trim</div>
+            <div className="bottom-bar__section-body">
+              <div className="bottom-bar__inline">
+                <span className="bottom-bar__trim-value">
+                  {inputGainDb > 0 ? '+' : ''}{inputGainDb.toFixed(1)}dB
+                </span>
+                <input
+                  className="settings-control__range bottom-bar__trim-slider"
+                  type="range"
+                  min={-12}
+                  max={12}
+                  step={0.5}
+                  value={inputGainDb}
+                  onChange={(event) => setInputGain(Number(event.target.value))}
+                  onDoubleClick={() => setInputGain(0)}
+                />
+              </div>
+            </div>
+          </section>
         </div>
-      </section>
+      </div>
 
-      <div className="bottom-bar__divider" />
-
-      <section className="bottom-bar__section">
-        <div className="bottom-bar__section-title">Theme</div>
-        <div className="bottom-bar__inline">
-          {PRESET_IDS.map((id) => {
-            const preset = PRESETS[id]
-            const active = presetId === id && !customAccent
-            return (
-              <button
-                key={id}
-                type="button"
-                className={`settings-swatch ${active ? 'is-active' : ''}`.trim()}
-                style={{ '--swatch-color': preset.accent } as CSSProperties}
-                onClick={() => setPreset(id)}
-                title={preset.name}
-                aria-label={preset.name}
-              />
-            )
-          })}
-          <input
-            className="settings-accent-input"
-            type="color"
-            value={accent}
-            onChange={(event) => setCustomAccent(event.target.value)}
-            title="Custom accent color"
-          />
-          {customAccent && (
-            <button
-              type="button"
-              className="settings-chip"
-              onClick={() => setCustomAccent(null)}
-            >
-              Reset
-            </button>
-          )}
-        </div>
-      </section>
-
-      <div className="bottom-bar__divider" />
-
-      <section className="bottom-bar__section">
-        <div className="bottom-bar__section-title">Audio Source</div>
-        <div className="bottom-bar__inline">
-          <select
-            className="settings-control__select"
-            value={selectedSourceValue}
-            onChange={(event) => {
-              void handleSourceChange(event.target.value)
-            }}
-          >
-            <optgroup label="Output Devices">
-              {visibleSystemSources.map((source) => (
-                <option key={source.id} value={`system:${source.id}`}>
-                  {source.isDefault ? `${source.label} (Default)` : source.label}
-                </option>
-              ))}
-            </optgroup>
-            {showInputDevices ? (
-              <optgroup label="Input Devices">
-                {devices.map((device) => (
-                  <option key={device.deviceId} value={`device:${device.deviceId}`}>
-                    {device.label || `Input ${device.deviceId.slice(0, 8)}`}
-                  </option>
-                ))}
-              </optgroup>
-            ) : null}
-          </select>
-
-          <div className={`settings-status-pill is-${captureStatus}`.trim()}>
-            <span className="settings-status-pill__dot" />
-            <span>{indicatorLabel}</span>
-          </div>
-        </div>
-
-        {captureError ? (
-          <div className="settings-error-text">{captureError}</div>
-        ) : null}
-      </section>
-
-      <div className="bottom-bar__divider" />
-
-      <section className="bottom-bar__section">
-        <div className="bottom-bar__section-title">Trim</div>
-        <div className="bottom-bar__inline">
-          <span className="bottom-bar__trim-value">
-            {inputGainDb > 0 ? '+' : ''}{inputGainDb.toFixed(1)}dB
-          </span>
-          <input
-            className="settings-control__range bottom-bar__trim-slider"
-            type="range"
-            min={-12}
-            max={12}
-            step={0.5}
-            value={inputGainDb}
-            onChange={(event) => setInputGain(Number(event.target.value))}
-            onDoubleClick={() => setInputGain(0)}
-          />
-        </div>
-      </section>
-
-      <button
-        type="button"
-        className="settings-panel__close"
-        onClick={onClose}
-      >
-        Close
-      </button>
+      <div className="bottom-bar__actions">
+        <button
+          type="button"
+          className="settings-panel__close bottom-bar__close"
+          onClick={onClose}
+        >
+          Close
+        </button>
+      </div>
     </div>
   )
 }

src/renderer/components/ScopeSettingsSection.tsx

@@ -74,6 +74,23 @@ function ToggleChip({
   )
 }
 
+function ToggleGroup({
+  label,
+  children,
+}: {
+  label: string
+  children: ReactNode
+}): JSX.Element {
+  return (
+    <div className="settings-control settings-control--full settings-control--stack">
+      <span className="settings-control__label">{label}</span>
+      <div className="settings-chip-row">
+        {children}
+      </div>
+    </div>
+  )
+}
+
 function SelectControl({
   label,
   value,
@@ -175,7 +192,7 @@ export default function ScopeSettingsSection({
                 ))}
               </SelectControl>
 
-              <div className="settings-chip-row settings-control--full">
+              <ToggleGroup label="Display">
                 <ToggleChip
                   label="Fill"
                   active={current.fillGradient}
@@ -191,7 +208,7 @@ export default function ScopeSettingsSection({
                   active={current.showGrid}
                   onClick={() => onUpdate('spectrum', { showGrid: !current.showGrid })}
                 />
-              </div>
+              </ToggleGroup>
 
               <RangeControl
                 label="Tilt"
@@ -234,7 +251,7 @@ export default function ScopeSettingsSection({
           const current = settings as ScopeSettings['oscilloscope']
           return (
             <>
-              <div className="settings-chip-row settings-control--full">
+              <ToggleGroup label="Options">
                 <ToggleChip
                   label="Pitch Lock"
                   active={current.pitchLock}
@@ -250,7 +267,7 @@ export default function ScopeSettingsSection({
                   active={current.showGrid}
                   onClick={() => onUpdate('oscilloscope', { showGrid: !current.showGrid })}
                 />
-              </div>
+              </ToggleGroup>
 
               <RangeControl
                 label="Line Width"
@@ -282,7 +299,7 @@ export default function ScopeSettingsSection({
                 <option value="linear-bipolar">Linear (Bi)</option>
               </SelectControl>
 
-              <div className="settings-chip-row settings-control--full">
+              <ToggleGroup label="Overlays">
                 <ToggleChip
                   label="RGB"
                   active={current.multiband}
@@ -293,7 +310,7 @@ export default function ScopeSettingsSection({
                   active={current.showGrid}
                   onClick={() => onUpdate('vectorscope', { showGrid: !current.showGrid })}
                 />
-              </div>
+              </ToggleGroup>
 
               <RangeControl
                 label="Persistence"
@@ -421,13 +438,13 @@ export default function ScopeSettingsSection({
           const current = settings as ScopeSettings['waveform']
           return (
             <>
-              <div className="settings-chip-row settings-control--full">
+              <ToggleGroup label="Bands">
                 <ToggleChip
                   label="Multiband"
                   active={current.multiband}
                   onClick={() => onUpdate('waveform', { multiband: !current.multiband })}
                 />
-              </div>
+              </ToggleGroup>
 
               <RangeControl
                 label="Gain"

src/renderer/components/SettingsPanel.tsx

@@ -1,10 +1,16 @@
-import { useMemo, type CSSProperties, type JSX } from 'react'
+import { useLayoutEffect, useMemo, useRef, type CSSProperties, type JSX } from 'react'
 import { buildAnalyzerGridTemplateColumns } from '../analyzerLayout'
 import ScopeSettingsSection from './ScopeSettingsSection'
 import { useSettingsStore } from '../stores/settingsStore'
 
-export default function SettingsPanel(): JSX.Element {
+interface SettingsPanelProps {
+  onHeightChange?: (height: number) => void
+}
+
+export default function SettingsPanel({ onHeightChange }: SettingsPanelProps): JSX.Element {
   const { scopeSettings, updateScopeSettings, hiddenScopes, scopeOrder, widthWeights, scopePopouts } = useSettingsStore()
+  const panelRef = useRef<HTMLDivElement | null>(null)
+  const scopeTrackRef = useRef<HTMLDivElement | null>(null)
 
   const dockedScopes = useMemo(
     () => scopeOrder.filter((kind) => !hiddenScopes.has(kind) && !scopePopouts[kind]?.poppedOut),
@@ -16,9 +22,39 @@ export default function SettingsPanel(): JSX.Element {
     return { gridTemplateColumns } as CSSProperties
   }, [dockedScopes, widthWeights])
 
+  useLayoutEffect(() => {
+    if (!onHeightChange || !panelRef.current) return
+
+    const panelElement = panelRef.current
+    let frameId = 0
+
+    const reportHeight = (): void => {
+      cancelAnimationFrame(frameId)
+      frameId = requestAnimationFrame(() => {
+        onHeightChange(Math.ceil(panelElement.scrollHeight))
+      })
+    }
+
+    reportHeight()
+
+    const resizeObserver = new ResizeObserver(() => {
+      reportHeight()
+    })
+
+    resizeObserver.observe(panelElement)
+    if (scopeTrackRef.current) {
+      resizeObserver.observe(scopeTrackRef.current)
+    }
+
+    return () => {
+      cancelAnimationFrame(frameId)
+      resizeObserver.disconnect()
+    }
+  }, [dockedScopes, onHeightChange, scopeTrackStyle])
+
   return (
-    <div className="settings-panel">
-      <div className="settings-panel__scope-track" style={scopeTrackStyle}>
+    <div className="settings-panel" ref={panelRef}>
+      <div className="settings-panel__scope-track" style={scopeTrackStyle} ref={scopeTrackRef}>
         {dockedScopes.map((kind) => (
           <ScopeSettingsSection
             key={kind}