feat(web): mobile action strip — tappable urgency pills replace stat cards

On mobile (<=767px), replace the 4 stat cards with a single-row
MobileActionStrip showing non-zero urgency pills (respond/merge/review)
with colored dots. Tapping a pill calls setExpandedLevel and scrolls to
the accordion board via id="mobile-board". Hides stat cards, dashboard
subtitle, and board-section-head on mobile to target ~92px hero height.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/web/src/app/globals.css

@@ -1957,27 +1957,111 @@ html.light .xterm .xterm-viewport:hover::-webkit-scrollbar-thumb:active {
 
   /* -- Hero section stacks vertically -- */
   .dashboard-hero__content {
-    flex-direction: column;
-    padding: 12px;
-    gap: 12px;
+    flex-direction: row;
+    flex-wrap: nowrap;
+    align-items: center;
+    padding: 0 12px;
+    gap: 8px;
+    min-height: 44px;
   }
 
   .dashboard-hero__primary {
-    flex-direction: column;
+    flex-direction: row;
     flex-basis: auto;
-    gap: 12px;
+    flex: 1;
+    align-items: center;
+    gap: 8px;
+    min-height: 44px;
   }
 
+  .dashboard-hero__heading {
+    flex: 1;
+    min-width: 0;
+  }
+
+  .dashboard-subtitle {
+    display: none;
+  }
+
+  /* Hide stat cards on mobile — replaced by the action strip */
   .dashboard-stat-cards {
-    width: 100%;
-    margin-left: 0;
+    display: none;
   }
 
   .dashboard-hero__meta {
-    width: 100%;
+    flex-shrink: 0;
     margin-left: 0;
   }
 
+  /* ── Mobile action strip ─────────────────────────────────────────────── */
+
+  .mobile-action-strip {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    flex-wrap: nowrap;
+    overflow-x: auto;
+    -webkit-overflow-scrolling: touch;
+    scrollbar-width: none;
+    flex-shrink: 0;
+  }
+
+  .mobile-action-strip::-webkit-scrollbar {
+    display: none;
+  }
+
+  .mobile-action-strip--all-good {
+    align-items: center;
+  }
+
+  .mobile-action-strip__all-good {
+    font-size: 11px;
+    color: var(--color-text-tertiary);
+    white-space: nowrap;
+  }
+
+  .mobile-action-pill {
+    display: inline-flex;
+    align-items: center;
+    gap: 5px;
+    padding: 5px 10px;
+    border: 1px solid var(--color-border-default);
+    background: var(--color-bg-surface);
+    cursor: pointer;
+    white-space: nowrap;
+    min-height: 32px;
+    transition:
+      background 0.12s ease,
+      border-color 0.12s ease;
+  }
+
+  .mobile-action-pill:hover,
+  .mobile-action-pill:active {
+    background: var(--color-bg-hover);
+    border-color: var(--color-border-strong);
+  }
+
+  .mobile-action-pill__dot {
+    width: 7px;
+    height: 7px;
+    border-radius: 999px;
+    flex-shrink: 0;
+  }
+
+  .mobile-action-pill__count {
+    font-size: 13px;
+    font-weight: 600;
+    font-variant-numeric: tabular-nums;
+    line-height: 1;
+  }
+
+  .mobile-action-pill__label {
+    font-size: 11px;
+    font-weight: 500;
+    color: var(--color-text-secondary);
+    text-transform: lowercase;
+  }
+
   /* -- Kanban board: stack columns vertically -- */
   .kanban-board {
     flex-direction: column;

packages/web/src/components/Dashboard.tsx

@@ -327,7 +327,17 @@ export function Dashboard({
                   </p>
                 </div>
               </div>
-              <StatusCards stats={liveStats} />
+              {isMobile ? (
+                <MobileActionStrip
+                  grouped={grouped}
+                  onPillTap={(level) => {
+                    setExpandedLevel(level);
+                    document.getElementById("mobile-board")?.scrollIntoView({ behavior: "smooth", block: "start" });
+                  }}
+                />
+              ) : (
+                <StatusCards stats={liveStats} />
+              )}
             </div>
 
             <div className="dashboard-hero__meta">
@@ -438,7 +448,7 @@ export function Dashboard({
             </div>
 
             {isMobile ? (
-              <div className="accordion-board">
+              <div id="mobile-board" className="accordion-board">
                 {MOBILE_KANBAN_ORDER.map((level) => (
                   <AttentionZone
                     key={level}
@@ -696,6 +706,68 @@ function ProjectMetric({ label, value, tone }: { label: string; value: number; t
   );
 }
 
+const MOBILE_ACTION_STRIP_LEVELS = [
+  {
+    level: "respond" as const,
+    label: "respond",
+    color: "var(--color-status-error)",
+  },
+  {
+    level: "merge" as const,
+    label: "merge",
+    color: "var(--color-status-ready)",
+  },
+  {
+    level: "review" as const,
+    label: "review",
+    color: "var(--color-accent-orange)",
+  },
+] satisfies Array<{ level: AttentionLevel; label: string; color: string }>;
+
+function MobileActionStrip({
+  grouped,
+  onPillTap,
+}: {
+  grouped: Record<AttentionLevel, DashboardSession[]>;
+  onPillTap: (level: AttentionLevel) => void;
+}) {
+  const activePills = MOBILE_ACTION_STRIP_LEVELS.filter(
+    ({ level }) => grouped[level].length > 0,
+  );
+
+  if (activePills.length === 0) {
+    return (
+      <div className="mobile-action-strip mobile-action-strip--all-good">
+        <span className="mobile-action-strip__all-good">All clear — agents are working</span>
+      </div>
+    );
+  }
+
+  return (
+    <div className="mobile-action-strip" role="navigation" aria-label="Urgency quick-nav">
+      {activePills.map(({ level, label, color }) => (
+        <button
+          key={level}
+          type="button"
+          className="mobile-action-pill"
+          onClick={() => onPillTap(level)}
+          aria-label={`${grouped[level].length} ${label} — scroll to section`}
+        >
+          <span
+            className="mobile-action-pill__dot"
+            style={{ background: color }}
+            aria-hidden="true"
+          />
+          <span className="mobile-action-pill__count" style={{ color }}>
+            {grouped[level].length}
+          </span>
+          <span className="mobile-action-pill__label">{label}</span>
+        </button>
+      ))}
+    </div>
+  );
+}
+
 function StatusCards({ stats }: { stats: DashboardStats }) {
   if (stats.totalSessions === 0) {
     return (