fix(ui): settings modal sizing regression + 17 more folds audit findings

Fix settings modal regression: Modal500 was wrapped in useModalStyle(560),
forcing maxWidth 560px and squishing the two-pane Settings layout (folds
size="500" is ~50rem). Restore desktop width to the folds recipe while
keeping mobile fullscreen.

N-series fixes:
- N13 ScheduledMessagesTray header: <Box as="button"> -> folds <Button>
- N28 composer char counter: drop undefined --tc-surface-low + opacity,
  use priority="300" and config.space token
- N31 collapsible "Read more" toggle: padded <Button> -> flush inline-button
  pattern matching (edited) link
- N41 UserPrivateNotes "Saving..." now shows a folds <Spinner>
- N43 Night Light slider: add accentColor; label opacity -> priority
- N44 mention-highlight Reset: bare <button> -> folds <Button> (drops
  undefined --border-interactive-normal); Boot button kept (TDS-only)
- N45 SelectTheme trigger variant -> Secondary to match SettingsSelect
- N49 RoomInsights StatTile emoji -> folds <Icon> (Photo/VideoCamera/
  Headphone/File)
- N54/N57 PiP overlay badges + fullscreen button: token discipline
  (config.radii/space, folds Text); dark scrim kept for video legibility
- N60 knock badge: match Pinned Messages pattern (no wrapper div, toRem
  insets, no hardcoded size overrides)
- N62 unverified-device banner: 3px left-accent -> standard border via
  color.Warning.ContainerLine; drop opacity hacks
- N65 Edit History: real "Load more" pagination (accumulate next_batch,
  de-dupe by id, re-sort by ts) replacing passive text
- N66 search date fields: raw <input type="date"> -> folds <Input>
- N67 SeasonalEffect z-index 9999 -> 9997 (below Night Light + modals)
- N73 Pending Requests header uses css.MembersGroupLabel
- N74 remove raw em-sized emoji <span> in RoomNavItem name
- N85/N86 RemindMeDialog: <Box role="dialog"> -> folds <Dialog>; preset
  MenuItems -> Buttons (fixes invalid menuitem-in-dialog ARIA)

Document deliberate WON'T FIX rationale for N9, N51, N61, N71, N75, N77.

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

src/app/components/CallEmbedProvider.tsx

@@ -435,18 +435,19 @@ function PipMuteOverlay({ callEmbed }: { callEmbed: CallEmbed }) {
   const localUserId = mx.getSafeUserId();
   const localDisplayName = getMxIdLocalPart(localUserId) ?? localUserId;
 
+  // Dark translucent scrim is intentional: these badges overlay arbitrary
+  // video, so a theme surface token would not guarantee legibility.
   const badgeStyle: React.CSSProperties = {
     position: 'absolute',
     zIndex: 3,
     background: 'rgba(0,0,0,0.65)',
     backdropFilter: 'blur(4px)',
-    borderRadius: '6px',
-    padding: '3px 7px',
+    borderRadius: config.radii.R300,
+    padding: `${config.space.S100} ${config.space.S200}`,
     display: 'flex',
     alignItems: 'center',
-    gap: '4px',
+    gap: config.space.S100,
     pointerEvents: 'none',
-    fontSize: '12px',
     lineHeight: 1,
     userSelect: 'none',
   };
@@ -456,21 +457,25 @@ function PipMuteOverlay({ callEmbed }: { callEmbed: CallEmbed }) {
       {localMicMuted && (
         <div
           aria-label={`Your microphone is muted (${localDisplayName})`}
-          title={`Your microphone is muted`}
-          style={{ ...badgeStyle, bottom: '8px', left: '8px', color: color.Critical.Main }}
+          title="Your microphone is muted"
+          style={{ ...badgeStyle, bottom: config.space.S200, left: config.space.S200 }}
         >
-          <Icon size="100" src={Icons.MicMute} filled />
-          <span style={{ fontSize: '11px', fontWeight: 600 }}>You</span>
+          <Icon size="100" src={Icons.MicMute} filled style={{ color: color.Critical.Main }} />
+          <Text as="span" size="T200" style={{ color: color.Critical.Main }}>
+            You
+          </Text>
         </div>
       )}
       {allRemoteMuted && (
         <div
           aria-label="All other participants are muted"
           title="All other participants are muted"
-          style={{ ...badgeStyle, top: '8px', right: '8px', color: color.Warning.Main }}
+          style={{ ...badgeStyle, top: config.space.S200, right: config.space.S200 }}
         >
-          <Icon size="50" src={Icons.MicMute} />
-          <span style={{ fontSize: '11px' }}>All muted</span>
+          <Icon size="50" src={Icons.MicMute} style={{ color: color.Warning.Main }} />
+          <Text as="span" size="T200" style={{ color: color.Warning.Main }}>
+            All muted
+          </Text>
         </div>
       )}
     </>
@@ -925,19 +930,23 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
                 padding: '6px',
               }}
             >
-              <div style={{ display: 'flex', gap: '6px', alignItems: 'center' }}>
+              <div style={{ display: 'flex', gap: config.space.S100, alignItems: 'center' }}>
                 {document.fullscreenEnabled && (
                   <button
                     type="button"
                     aria-label={pipIsFullscreen ? 'Exit fullscreen' : 'Fullscreen camera'}
                     title={pipIsFullscreen ? 'Exit fullscreen' : 'Fullscreen camera'}
-                    onClick={(e) => { e.stopPropagation(); handlePipFullscreen(); }}
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      handlePipFullscreen();
+                    }}
                     style={{
+                      // Dark scrim is intentional for legibility over arbitrary video.
                       background: 'rgba(0,0,0,0.65)',
                       backdropFilter: 'blur(4px)',
                       border: 'none',
-                      borderRadius: '6px',
-                      padding: '4px 7px',
+                      borderRadius: config.radii.R300,
+                      padding: `${config.space.S100} ${config.space.S200}`,
                       color: '#fff',
                       fontSize: '13px',
                       cursor: 'pointer',
@@ -953,8 +962,8 @@ export function CallEmbedProvider({ children }: CallEmbedProviderProps) {
                   style={{
                     background: 'rgba(0,0,0,0.65)',
                     backdropFilter: 'blur(4px)',
-                    borderRadius: '6px',
-                    padding: '3px 8px',
+                    borderRadius: config.radii.R300,
+                    padding: `${config.space.S100} ${config.space.S200}`,
                     color: '#fff',
                     fontSize: '11px',
                     fontWeight: 600,