Frontend redesign chunk 8: incidents browse

Rewrite app/incidents/page.tsx per UI_REDESIGN.md chunk 8. Replaces the old
active/resolved two-table split with a single timeline-grouped list (Today
/ Yesterday / date), each row using the same rail-card anatomy as Live's
incident panel — severity spine + type glyph + severity chip + ON AIR pill
(from useActiveCalls, matching a call's incident_ids against the row) +
title + location + on-scene unit chips + age/call-count — so status is a
chip on the row instead of a section boundary, and Live/Incidents visibly
read as the same object at two densities. Severity filter and sort are
unchanged. The create-incident modal and resolve action are unchanged.

Per UI_REDESIGN.md chunk 8.

drb-frontend/app/incidents/page.tsx

@@ -4,19 +4,17 @@ import { useMemo, useState } from "react";
 import { useRouter } from "next/navigation";
 import { useAuth } from "@/components/AuthProvider";
 import { useIncidents } from "@/lib/useIncidents";
+import { useActiveCalls } from "@/lib/useCalls";
 import { c2api } from "@/lib/c2api";
 import type { IncidentRecord } from "@/lib/types";
 import { PageHeader } from "@/components/ui/PageHeader";
-import { Card } from "@/components/ui/Card";
 import { Button } from "@/components/ui/Button";
 import { Badge } from "@/components/ui/Badge";
 import { EmptyState } from "@/components/ui/EmptyState";
 import { SkeletonCard } from "@/components/ui/Skeleton";
-import { severityBadge, severityRank } from "@/lib/severity";
-import { TypeBadge } from "@/components/IncidentBadges";
-
-// Severity badge/ordering now lives in lib/severity.ts (shared with CallRow).
-// `severityBadge()` already returns null for the legacy "unknown" value.
+import { isKnownSeverity, severityRank } from "@/lib/severity";
+import { SeverityMark, SeveritySpine } from "@/components/marks/SeverityMark";
+import { TypeGlyph } from "@/components/marks/TypeGlyph";
 
 type SeverityFilter = "all" | "minor" | "moderate" | "major";
 const SEVERITY_FILTERS: { key: SeverityFilter; label: string }[] = [
@@ -30,120 +28,84 @@ const FILTER_THRESHOLD: Record<SeverityFilter, number> = { all: -1, minor: 1, mo
 type SortMode = "recent" | "severity";
 
 function fmtTime(iso: string) {
-  try { return new Date(iso).toLocaleString(); } catch { return iso; }
+  try { return new Date(iso).toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" }); } catch { return iso; }
 }
 
-// ---------------------------------------------------------------------------
-// Rows / cards
-// ---------------------------------------------------------------------------
+function dayBucket(iso: string): string {
+  const d = new Date(iso);
+  const now = new Date();
+  const startOfDay = (x: Date) => new Date(x.getFullYear(), x.getMonth(), x.getDate()).getTime();
+  const diffDays = Math.round((startOfDay(now) - startOfDay(d)) / 86_400_000);
+  if (diffDays === 0) return "Today";
+  if (diffDays === 1) return "Yesterday";
+  return d.toLocaleDateString([], { weekday: "long", month: "short", day: "numeric" });
+}
 
-function IncidentRow({ incident, isAdmin, onResolve }: {
+function timeAgo(iso: string): string {
+  const s = Math.floor((Date.now() - new Date(iso).getTime()) / 1000);
+  if (s < 60) return `${s}s ago`;
+  if (s < 3600) return `${Math.floor(s / 60)}m ago`;
+  if (s < 86400) return `${Math.floor(s / 3600)}h ago`;
+  return `${Math.floor(s / 86400)}d ago`;
+}
+
+// Same rail-card anatomy as Live (MapView's incident panel), at browse
+// density: severity spine, type glyph, severity chip, ON AIR pill, title,
+// location, units-on-scene chips, age + call count. UI_REDESIGN.md §5.1/§5.2
+// — the point is that Live and Incidents read as the same object.
+function IncidentBrowseRow({
+  incident,
+  isAdmin,
+  onAir,
+  onResolve,
+}: {
   incident: IncidentRecord;
   isAdmin: boolean;
+  onAir: boolean;
   onResolve: (id: string) => void;
 }) {
   const router = useRouter();
+  const sev = isKnownSeverity(incident.severity) ? incident.severity : "routine";
+  const units = incident.units_active ?? incident.units ?? [];
 
   return (
-    <tr
-      className="border-b border-gray-800 last:border-0 hover:bg-gray-900/60 cursor-pointer transition-colors"
+    <div
+      className="flex gap-3 py-3 px-3 rounded-lg hover:bg-raised cursor-pointer transition-colors items-stretch"
       onClick={() => router.push(`/incidents/${incident.incident_id}`)}
     >
-      <td className="px-4 py-3"><TypeBadge type={incident.type} /></td>
-      <td className="px-4 py-3 text-white text-sm">{incident.title ?? "—"}</td>
-      <td className="px-4 py-3">
-        <Badge tone={incident.status === "active" ? "success" : "neutral"}>{incident.status}</Badge>
-      </td>
-      <td className="px-4 py-3">{severityBadge(incident.severity)}</td>
-      <td className="px-4 py-3 text-gray-400 text-xs font-mono">{incident.call_ids.length}</td>
-      <td className="px-4 py-3 text-gray-400 text-xs font-mono">{fmtTime(incident.started_at)}</td>
-      <td className="px-4 py-3 text-gray-400 text-xs font-mono">{fmtTime(incident.updated_at)}</td>
-      <td className="px-4 py-3">
+      <SeveritySpine severity={sev} />
+      <TypeGlyph type={incident.type} size={20} className="text-ink-2 mt-0.5 shrink-0" />
+      <div className="min-w-0 flex-1">
+        <div className="flex items-center gap-2 flex-wrap">
+          <SeverityMark severity={sev} showLabel />
+          {onAir && (
+            <span className="text-[10px] font-semibold px-1.5 py-0.5 rounded bg-sev-major/15 text-sev-major uppercase tracking-wide">
+              On air
+            </span>
+          )}
+          <Badge tone={incident.status === "active" ? "brand" : "neutral"}>{incident.status}</Badge>
+        </div>
+        <p className="text-ink text-sm font-semibold leading-snug mt-0.5 truncate">{incident.title ?? "Incident"}</p>
+        {incident.location && <p className="text-ink-muted text-xs mt-0.5 truncate">{incident.location}</p>}
+        <div className="flex items-center gap-2 flex-wrap mt-1">
+          {units.slice(0, 4).map((u) => (
+            <span key={u} className="text-[10px] font-mono px-1.5 py-0.5 rounded bg-raised text-ink-2">{u}</span>
+          ))}
+          <span className="text-xs text-ink-muted font-mono ml-auto">
+            {fmtTime(incident.started_at)} · {timeAgo(incident.started_at)} · {incident.call_ids.length} call{incident.call_ids.length !== 1 ? "s" : ""}
+          </span>
+        </div>
+      </div>
       {isAdmin && incident.status === "active" && (
         <Button
           size="sm" variant="secondary"
+          className="self-center shrink-0"
           onClick={(e) => { e.stopPropagation(); onResolve(incident.incident_id); }}
         >
           Resolve
         </Button>
       )}
-      </td>
-    </tr>
-  );
-}
-
-function IncidentCards({ incidents, isAdmin, onResolve }: {
-  incidents: IncidentRecord[];
-  isAdmin: boolean;
-  onResolve: (id: string) => void;
-}) {
-  const router = useRouter();
-  return (
-    <div className="space-y-2">
-      {incidents.map((inc) => (
-        <Card
-          key={inc.incident_id}
-          padding="sm"
-          hover
-          className="cursor-pointer active:bg-gray-800"
-          onClick={() => router.push(`/incidents/${inc.incident_id}`)}
-        >
-          <div className="flex items-center justify-between gap-2 mb-1.5">
-            <div className="flex items-center gap-2">
-              <TypeBadge type={inc.type} />
-              <Badge tone={inc.status === "active" ? "success" : "neutral"}>{inc.status}</Badge>
     </div>
-            {isAdmin && inc.status === "active" && (
-              <Button size="sm" variant="secondary" onClick={(e) => { e.stopPropagation(); onResolve(inc.incident_id); }}>
-                Resolve
-              </Button>
-            )}
-          </div>
-          <p className="text-white text-sm font-semibold leading-snug">{inc.title ?? "—"}</p>
-          <div className="flex items-center gap-2 mt-1">
-            {severityBadge(inc.severity)}
-            <p className="text-gray-500 text-xs font-mono">
-              {fmtTime(inc.started_at)} · {inc.call_ids.length} call{inc.call_ids.length !== 1 ? "s" : ""}
-            </p>
-          </div>
-        </Card>
-      ))}
-    </div>
-  );
-}
-
-function IncidentTable({ incidents, isAdmin, onResolve }: {
-  incidents: IncidentRecord[];
-  isAdmin: boolean;
-  onResolve: (id: string) => void;
-}) {
-  return (
-    <>
-      <div className="sm:hidden">
-        <IncidentCards incidents={incidents} isAdmin={isAdmin} onResolve={onResolve} />
-      </div>
-      <div className="hidden sm:block bg-gray-900 border border-gray-800 rounded-xl overflow-hidden overflow-x-auto">
-        <table className="w-full text-left">
-          <thead>
-            <tr className="border-b border-gray-800 text-xs text-gray-500 uppercase">
-              <th className="px-4 py-3">Type</th>
-              <th className="px-4 py-3">Title</th>
-              <th className="px-4 py-3">Status</th>
-              <th className="px-4 py-3">Severity</th>
-              <th className="px-4 py-3">Calls</th>
-              <th className="px-4 py-3">Started</th>
-              <th className="px-4 py-3">Updated</th>
-              <th className="px-4 py-3"></th>
-            </tr>
-          </thead>
-          <tbody>
-            {incidents.map((inc) => (
-              <IncidentRow key={inc.incident_id} incident={inc} isAdmin={isAdmin} onResolve={onResolve} />
-            ))}
-          </tbody>
-        </table>
-      </div>
-    </>
   );
 }
 
@@ -166,20 +128,20 @@ function CreateModal({ onClose, onCreate }: { onClose: () => void; onCreate: (bo
 
   return (
     <div className="fixed inset-0 bg-black/60 flex items-center justify-center z-50 p-4">
-      <form onSubmit={handleSubmit} className="bg-gray-900 border border-gray-700 rounded-xl p-6 w-full max-w-md space-y-4">
-        <h2 className="text-white font-bold">Create Incident</h2>
+      <form onSubmit={handleSubmit} className="bg-surface border border-line rounded-xl p-6 w-full max-w-md space-y-4">
+        <h2 className="text-ink font-semibold">Create Incident</h2>
         <div>
-          <label className="text-xs text-gray-400 block mb-1">Title</label>
+          <label className="text-xs text-ink-muted block mb-1">Title</label>
           <input
             required value={title} onChange={(e) => setTitle(e.target.value)}
-            className="w-full bg-gray-800 border border-gray-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none focus:border-indigo-500"
+            className="w-full bg-raised border border-line rounded-lg px-3 py-2 text-ink text-sm focus:outline-none focus:border-accent"
           />
         </div>
         <div>
-          <label className="text-xs text-gray-400 block mb-1">Type</label>
+          <label className="text-xs text-ink-muted block mb-1">Type</label>
           <select
             value={type} onChange={(e) => setType(e.target.value)}
-            className="w-full bg-gray-800 border border-gray-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none"
+            className="w-full bg-raised border border-line rounded-lg px-3 py-2 text-ink text-sm focus:outline-none"
           >
             {["fire", "police", "ems", "accident", "other"].map((t) => (
               <option key={t} value={t}>{t}</option>
@@ -187,10 +149,10 @@ function CreateModal({ onClose, onCreate }: { onClose: () => void; onCreate: (bo
           </select>
         </div>
         <div>
-          <label className="text-xs text-gray-400 block mb-1">Summary (optional)</label>
+          <label className="text-xs text-ink-muted block mb-1">Summary (optional)</label>
           <textarea
             value={summary} onChange={(e) => setSummary(e.target.value)} rows={2}
-            className="w-full bg-gray-800 border border-gray-700 rounded-lg px-3 py-2 text-white text-sm focus:outline-none resize-none"
+            className="w-full bg-raised border border-line rounded-lg px-3 py-2 text-ink text-sm focus:outline-none resize-none"
           />
         </div>
         <div className="flex gap-3 justify-end">
@@ -202,17 +164,22 @@ function CreateModal({ onClose, onCreate }: { onClose: () => void; onCreate: (bo
   );
 }
 
-// ---------------------------------------------------------------------------
-// Page
-// ---------------------------------------------------------------------------
-
 export default function IncidentsPage() {
   const { isAdmin } = useAuth();
   const { incidents, loading } = useIncidents();
+  const activeCalls = useActiveCalls();
   const [showCreate, setShowCreate] = useState(false);
   const [severityFilter, setSeverityFilter] = useState<SeverityFilter>("all");
   const [sortMode, setSortMode] = useState<SortMode>("recent");
 
+  const onAirIncidentIds = useMemo(() => {
+    const s = new Set<string>();
+    for (const c of activeCalls) {
+      for (const id of c.incident_ids?.length ? c.incident_ids : c.incident_id ? [c.incident_id] : []) s.add(id);
+    }
+    return s;
+  }, [activeCalls]);
+
   const filtered = useMemo(() => {
     const threshold = FILTER_THRESHOLD[severityFilter];
     const list = incidents.filter((i) => severityRank(i.severity) >= threshold);
@@ -222,9 +189,22 @@ export default function IncidentsPage() {
     return list; // useIncidents() already orders by started_at desc
   }, [incidents, severityFilter, sortMode]);
 
-  const active   = filtered.filter((i) => i.status === "active");
-  const resolved = filtered.filter((i) => i.status === "resolved");
   const hiddenCount = incidents.length - filtered.length;
+  const activeCount = filtered.filter((i) => i.status === "active").length;
+
+  // Timeline grouping (Today / Yesterday / date) replaces the old
+  // active/resolved two-table split — status is now a chip on the row, not a
+  // section boundary, so an active and a resolved incident from the same
+  // evening read as what they are: the same kind of object.
+  const groups = useMemo(() => {
+    const byDay = new Map<string, IncidentRecord[]>();
+    for (const inc of filtered) {
+      const key = dayBucket(inc.started_at);
+      if (!byDay.has(key)) byDay.set(key, []);
+      byDay.get(key)!.push(inc);
+    }
+    return byDay;
+  }, [filtered]);
 
   async function handleResolve(id: string) {
     try { await c2api.updateIncident(id, { status: "resolved" }); }
@@ -235,31 +215,30 @@ export default function IncidentsPage() {
     <div className="space-y-6">
       <PageHeader
         title="Incidents"
-        badge={active.length > 0 && <Badge tone="danger">{active.length} active</Badge>}
+        badge={activeCount > 0 && <Badge tone="danger">{activeCount} active</Badge>}
         action={isAdmin && <Button onClick={() => setShowCreate(true)}>+ Create Incident</Button>}
       />
 
-      {/* Severity filter + sort — severity is a filter dimension, not decoration */}
       <div className="flex flex-wrap items-center justify-between gap-3">
-        <div className="flex flex-wrap gap-1 bg-gray-900 border border-gray-800 rounded-lg p-1 w-fit">
+        <div className="flex flex-wrap gap-1 bg-surface border border-line rounded-lg p-1 w-fit">
           {SEVERITY_FILTERS.map(({ key, label }) => (
             <button
               key={key}
               onClick={() => setSeverityFilter(key)}
-              className={`text-sm font-mono px-3.5 py-1.5 rounded-md transition-colors ${
-                severityFilter === key ? "bg-gray-800 text-white" : "text-gray-500 hover:text-gray-300"
+              className={`text-sm px-3.5 py-1.5 rounded-md transition-colors ${
+                severityFilter === key ? "bg-raised text-ink" : "text-ink-muted hover:text-ink-2"
               }`}
             >
               {label}
             </button>
           ))}
         </div>
-        <label className="flex items-center gap-2 text-xs font-mono text-gray-500">
+        <label className="flex items-center gap-2 text-xs text-ink-muted">
           Sort
           <select
             value={sortMode}
             onChange={(e) => setSortMode(e.target.value as SortMode)}
-            className="bg-gray-900 border border-gray-800 rounded-lg px-2 py-1.5 text-gray-200 focus:outline-none focus:border-indigo-500"
+            className="bg-surface border border-line rounded-lg px-2 py-1.5 text-ink-2 focus:outline-none focus:border-accent"
           >
             <option value="recent">Most recent</option>
             <option value="severity">Highest severity</option>
@@ -274,24 +253,27 @@ export default function IncidentsPage() {
       ) : (
         <>
           {hiddenCount > 0 && (
-            <p className="text-xs text-gray-600 font-mono">
+            <p className="text-xs text-ink-muted">
               {hiddenCount} incident{hiddenCount !== 1 ? "s" : ""} hidden by the severity filter.
             </p>
           )}
 
-          {active.length > 0 && (
-            <section>
-              <h2 className="text-sm font-mono text-gray-400 uppercase tracking-wider mb-3">Active</h2>
-              <IncidentTable incidents={active} isAdmin={isAdmin} onResolve={handleResolve} />
+          {Array.from(groups.entries()).map(([day, incs]) => (
+            <section key={day}>
+              <h2 className="text-sm text-ink-muted font-medium mb-1">{day}</h2>
+              <div className="bg-surface border border-line rounded-xl divide-y divide-line">
+                {incs.map((inc) => (
+                  <IncidentBrowseRow
+                    key={inc.incident_id}
+                    incident={inc}
+                    isAdmin={isAdmin}
+                    onAir={onAirIncidentIds.has(inc.incident_id)}
+                    onResolve={handleResolve}
+                  />
+                ))}
+              </div>
             </section>
-          )}
-
-          {resolved.length > 0 && (
-            <section>
-              <h2 className="text-sm font-mono text-gray-400 uppercase tracking-wider mb-3">Resolved</h2>
-              <IncidentTable incidents={resolved} isAdmin={isAdmin} onResolve={handleResolve} />
-            </section>
-          )}
+          ))}
 
           {filtered.length === 0 && (
             <EmptyState