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/features/message-search/SearchFilters.tsx

@@ -25,7 +25,6 @@ import {
   Input,
   Badge,
   RectCords,
-  color,
 } from 'folds';
 import { SearchOrderBy } from 'matrix-js-sdk';
 import FocusTrap from 'focus-trap-react';
@@ -591,36 +590,26 @@ function DateRangeButton({ fromTs, toTs, onChange }: DateRangeButtonProps) {
               <Line variant="Surface" size="300" />
               <Box direction="Column" gap="100">
                 <Text size="L400">From</Text>
-                <input
+                <Input
                   type="date"
+                  variant="SurfaceVariant"
+                  size="300"
+                  radii="300"
                   value={fromDate}
                   max={toDate || undefined}
                   onChange={(e) => handleFrom(e.target.value)}
-                  style={{
-                    background: color.SurfaceVariant.Container,
-                    border: `1px solid ${color.SurfaceVariant.ContainerLine}`,
-                    borderRadius: config.radii.R300,
-                    color: 'inherit',
-                    fontSize: '0.82rem',
-                    padding: `${config.space.S100} ${config.space.S200}`,
-                  }}
                 />
               </Box>
               <Box direction="Column" gap="100">
                 <Text size="L400">To</Text>
-                <input
+                <Input
                   type="date"
+                  variant="SurfaceVariant"
+                  size="300"
+                  radii="300"
                   value={toDate}
                   min={fromDate || undefined}
                   onChange={(e) => handleTo(e.target.value)}
-                  style={{
-                    background: color.SurfaceVariant.Container,
-                    border: `1px solid ${color.SurfaceVariant.ContainerLine}`,
-                    borderRadius: config.radii.R300,
-                    color: 'inherit',
-                    fontSize: '0.82rem',
-                    padding: `${config.space.S100} ${config.space.S200}`,
-                  }}
                 />
               </Box>
               {hasRange && (