Phase 5: secondary screens (diagnostics, skills, training)

Port the remaining read views from the vanilla UI to Next.js:

- /diagnostics — system health snapshot (DB connected, table counts,
  active tasks, failed and stuck documents). Uses the existing
  /api/system/diagnostics payload with a 10s refetchInterval so the
  page self-updates while the user watches.
- /skills — Paperclip skill inventory with sync status (DB-only,
  disk-only, synced, not-synced) as a card grid driven by
  /api/admin/skills.
- /training — Dafna's style portrait as three tabs on one page:
  * Report: corpus KPIs + CSS conic-gradient subject donut
    (SubjectDonut ported from index.html renderHero) + horizontal
    anatomy bars + top-12 signature phrases.
  * Corpus: TanStack Table of style_corpus rows with an inline
    delete mutation (useDeleteCorpusEntry invalidates both the
    corpus list and the style report so KPIs update).
  * Compare: two-decision selector backed by /api/training/compare,
    side-by-side panels plus shared / only-A / only-B pattern
    lists.

New API modules: lib/api/system.ts, lib/api/skills.ts,
lib/api/training.ts. All three use TanStack Query with staleTime
profiles tuned per endpoint (10s for diagnostics, 30s for skills,
60s for training reports).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web-ui/src/app/diagnostics/page.tsx

@@ -0,0 +1,219 @@
+"use client";
+
+import Link from "next/link";
+import { AlertTriangle, CheckCircle2, Clock, Database } from "lucide-react";
+import { AppShell } from "@/components/app-shell";
+import { Card, CardContent } from "@/components/ui/card";
+import { Badge } from "@/components/ui/badge";
+import { Skeleton } from "@/components/ui/skeleton";
+import { useDiagnostics, type DiagDoc } from "@/lib/api/system";
+
+const TABLE_LABELS: Record<string, string> = {
+  cases: "תיקים",
+  documents: "מסמכים",
+  document_chunks: "chunks",
+  style_corpus: "קורפוס סגנון",
+  style_patterns: "דפוסי סגנון",
+};
+
+function formatRelativeTime(iso: string | null) {
+  if (!iso) return "—";
+  const then = new Date(iso);
+  const diffMs = Date.now() - then.getTime();
+  const min = Math.floor(diffMs / 60000);
+  if (min < 1) return "עכשיו";
+  if (min < 60) return `לפני ${min} דקות`;
+  const hr = Math.floor(min / 60);
+  if (hr < 24) return `לפני ${hr} שעות`;
+  const days = Math.floor(hr / 24);
+  if (days < 30) return `לפני ${days} ימים`;
+  return then.toLocaleDateString("he-IL");
+}
+
+function DocRow({ doc, tone }: { doc: DiagDoc; tone: "danger" | "warn" }) {
+  const cls =
+    tone === "danger" ? "bg-danger-bg/60 border-danger/30" : "bg-warn-bg/60 border-warn/30";
+  return (
+    <li
+      className={`rounded border px-3 py-2 flex items-center gap-3 text-sm ${cls}`}
+    >
+      <div className="flex-1 min-w-0">
+        <div className="text-ink font-medium truncate" title={doc.title}>
+          {doc.title || "(ללא כותרת)"}
+        </div>
+        <div className="text-[0.72rem] text-ink-muted flex gap-3 mt-0.5">
+          {doc.case_number && (
+            <Link href={`/cases/${doc.case_number}`} className="hover:text-gold-deep">
+              ערר {doc.case_number}
+            </Link>
+          )}
+          <span>{formatRelativeTime(doc.created_at)}</span>
+        </div>
+      </div>
+      <Badge variant="outline" className="text-[0.7rem]">{doc.status}</Badge>
+    </li>
+  );
+}
+
+export default function DiagnosticsPage() {
+  const { data, isPending, error } = useDiagnostics();
+
+  return (
+    <AppShell>
+      <section className="space-y-6">
+        <header>
+          <nav className="text-[0.78rem] text-ink-muted mb-1">
+            <Link href="/" className="hover:text-gold-deep">בית</Link>
+            <span aria-hidden> · </span>
+            <span className="text-navy">אבחון מערכת</span>
+          </nav>
+          <h1 className="text-navy mb-0">אבחון מערכת</h1>
+          <p className="text-ink-muted text-sm mt-1 max-w-2xl">
+            מצב ה-DB, מסמכים שנכשלו או תקועים, ומשימות רקע פעילות. מתעדכן כל 10
+            שניות.
+          </p>
+        </header>
+
+        <div className="h-[2px] bg-gradient-to-l from-transparent via-gold to-transparent" />
+
+        {error ? (
+          <Card className="bg-danger-bg border-danger/40">
+            <CardContent className="px-6 py-6 text-center text-danger">
+              {error.message}
+            </CardContent>
+          </Card>
+        ) : (
+          <>
+            {/* DB status + table counts */}
+            <div className="grid gap-4 md:grid-cols-[240px_1fr]">
+              <Card className="bg-surface border-rule shadow-sm">
+                <CardContent className="px-5 py-4 flex flex-col items-start gap-2">
+                  <div className="flex items-center gap-2 text-ink-muted text-[0.72rem] uppercase tracking-wider">
+                    <Database className="w-3.5 h-3.5" />
+                    מצב DB
+                  </div>
+                  {isPending ? (
+                    <Skeleton className="h-6 w-24" />
+                  ) : data?.db_ok ? (
+                    <div className="flex items-center gap-2 text-success font-semibold">
+                      <CheckCircle2 className="w-5 h-5" />
+                      <span>מחובר</span>
+                    </div>
+                  ) : (
+                    <div className="flex items-center gap-2 text-danger font-semibold">
+                      <AlertTriangle className="w-5 h-5" />
+                      <span>מנותק</span>
+                    </div>
+                  )}
+                </CardContent>
+              </Card>
+
+              <Card className="bg-surface border-rule shadow-sm">
+                <CardContent className="px-5 py-4">
+                  <div className="text-ink-muted text-[0.72rem] uppercase tracking-wider mb-3">
+                    ספירת טבלאות
+                  </div>
+                  <dl className="grid grid-cols-2 md:grid-cols-5 gap-y-2 gap-x-4">
+                    {Object.keys(TABLE_LABELS).map((key) => (
+                      <div key={key} className="space-y-0.5">
+                        <dt className="text-[0.72rem] text-ink-muted">
+                          {TABLE_LABELS[key]}
+                        </dt>
+                        <dd className="font-display font-bold text-navy text-xl tabular-nums">
+                          {isPending ? "—" : (data?.tables[key] ?? "—")}
+                        </dd>
+                      </div>
+                    ))}
+                  </dl>
+                </CardContent>
+              </Card>
+            </div>
+
+            {/* Active tasks */}
+            <Card className="bg-surface border-rule shadow-sm">
+              <CardContent className="px-6 py-5">
+                <h2 className="text-navy text-lg mb-3 flex items-center gap-2">
+                  <Clock className="w-4 h-4" />
+                  משימות רקע פעילות
+                  <Badge variant="outline" className="text-[0.7rem] tabular-nums">
+                    {data?.active_tasks.length ?? 0}
+                  </Badge>
+                </h2>
+                {isPending ? (
+                  <Skeleton className="h-16 w-full" />
+                ) : data?.active_tasks.length === 0 ? (
+                  <p className="text-ink-muted text-sm">אין משימות פעילות</p>
+                ) : (
+                  <ul className="space-y-2">
+                    {data?.active_tasks.map((t) => (
+                      <li
+                        key={t.task_id}
+                        className="flex items-center gap-3 text-sm rounded bg-rule-soft/60 border border-rule px-3 py-2"
+                      >
+                        <span className="flex-1 text-ink truncate">
+                          {t.filename || t.task_id}
+                        </span>
+                        <Badge variant="outline" className="text-[0.7rem]">
+                          {t.step || t.status}
+                        </Badge>
+                      </li>
+                    ))}
+                  </ul>
+                )}
+              </CardContent>
+            </Card>
+
+            {/* Failed + stuck docs */}
+            <div className="grid gap-4 md:grid-cols-2">
+              <Card className="bg-surface border-rule shadow-sm">
+                <CardContent className="px-6 py-5">
+                  <h2 className="text-danger text-lg mb-3 flex items-center gap-2">
+                    <AlertTriangle className="w-4 h-4" />
+                    מסמכים שנכשלו
+                    <Badge variant="outline" className="text-[0.7rem] tabular-nums">
+                      {data?.failed_documents.length ?? 0}
+                    </Badge>
+                  </h2>
+                  {isPending ? (
+                    <Skeleton className="h-20 w-full" />
+                  ) : data?.failed_documents.length === 0 ? (
+                    <p className="text-ink-muted text-sm">אין כשלונות</p>
+                  ) : (
+                    <ul className="space-y-2">
+                      {data?.failed_documents.map((d) => (
+                        <DocRow key={d.id} doc={d} tone="danger" />
+                      ))}
+                    </ul>
+                  )}
+                </CardContent>
+              </Card>
+
+              <Card className="bg-surface border-rule shadow-sm">
+                <CardContent className="px-6 py-5">
+                  <h2 className="text-warn text-lg mb-3 flex items-center gap-2">
+                    <Clock className="w-4 h-4" />
+                    תקועים (&gt; 10 דק׳)
+                    <Badge variant="outline" className="text-[0.7rem] tabular-nums">
+                      {data?.stuck_documents.length ?? 0}
+                    </Badge>
+                  </h2>
+                  {isPending ? (
+                    <Skeleton className="h-20 w-full" />
+                  ) : data?.stuck_documents.length === 0 ? (
+                    <p className="text-ink-muted text-sm">אין מסמכים תקועים</p>
+                  ) : (
+                    <ul className="space-y-2">
+                      {data?.stuck_documents.map((d) => (
+                        <DocRow key={d.id} doc={d} tone="warn" />
+                      ))}
+                    </ul>
+                  )}
+                </CardContent>
+              </Card>
+            </div>
+          </>
+        )}
+      </section>
+    </AppShell>
+  );
+}