feat: dashboard UI/UX overhaul from full review

Shared foundation:
- New Modal component on native <dialog>.showModal() (focus trap, inert
  background, Escape, focus restore, scroll lock); all eight dialogs and
  both globalThis.confirm calls migrated to it
- Design tokens for success/warning/danger surfaces; pill danger variant;
  .sr-only utility; toast layering above dialog backdrops; not-allowed
  cursor for validity-disabled buttons

Conversations/attention: auto-scroll with jump-to-latest, per-conversation
draft persistence, suggestion undo, 30s auto-refresh with refresh controls,
unread emphasis and counts, blur-consistent share dialog, empty-accounts
guidance, collapsed user lookup, relative timestamps, danger pills for
critical items

Media/library/outreach: click-blurred-to-reveal, lightbox with arrow
navigation and captions, dirty-form preservation across refetches, upload
validation with thumbnail preview, save feedback, result counts with
load-more and clear-filters, ticking countdowns from a single clock

Overview/performance/operations/settings: mutation errors inside the
confirm dialog, live sending-window countdown, offline-aware loading
states, per-panel loading/error with retry, 7/30/90-day range toggle,
console scroll yielding with shown/retained counts, risky-save matching
by subreddit name instead of index, useBlocker unsaved-changes guard,
single-pass validation with focus-to-first-error, access panel JSON
validation and input reset

Tests: 806 -> 844 passing; both typechecks clean.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

apps/dashboard/src/features/performance/performance.css

@@ -12,10 +12,17 @@
 .interval { display: block; margin-top: .2rem; color: var(--muted); white-space: nowrap; }
 .funnel-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; padding: 0; margin: 0; list-style: none; }
 .funnel-list li { display: flex; justify-content: space-between; gap: 1rem; padding: .8rem; background: var(--surface-raised); border: 1px solid var(--border); border-radius: .65rem; }
+.funnel-value { display: grid; gap: .1rem; text-align: right; }
 .guardrail-list { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: .7rem; color: var(--muted); }
 .guardrail-list span { padding: .45rem .65rem; border: 1px solid var(--border); border-radius: 999px; }
 .trend-list { display: grid; gap: .65rem; padding: 0; margin: 0; list-style: none; }
-.trend-list li { display: grid; grid-template-columns: 6.5rem minmax(5rem, 1fr) 3rem 8rem 6rem; align-items: center; gap: .75rem; }
+/* Narrow screens: wrap each day into two rows instead of forcing a wide grid. */
+.trend-list li { display: grid; grid-template-columns: 4.5rem minmax(4rem, 1fr) 3rem; align-items: center; gap: .4rem .75rem; }
+.trend-list li > span:not(.trend-track), .trend-list li .sample-size { grid-column: span 3; font-size: .78rem; }
+@media (min-width: 48rem) {
+  .trend-list li { grid-template-columns: 6.5rem minmax(5rem, 1fr) 3rem 8rem 6rem; gap: .75rem; }
+  .trend-list li > span:not(.trend-track), .trend-list li .sample-size { grid-column: auto; font-size: inherit; }
+}
 .trend-track { height: .5rem; overflow: hidden; background: var(--border); border-radius: 999px; }
 .trend-track span { display: block; height: 100%; background: var(--accent); border-radius: inherit; }
 .example-grid { display: grid; gap: .75rem; }