feat: external precedent library with auto halacha extraction

Adds a third corpus of legal authority distinct from style_corpus
(Daphna's prior decisions for voice) and case_precedents (chair-attached
quotes per case). The new corpus holds chair-uploaded court rulings and
other appeals committee decisions, with binding rules (הלכות) extracted
automatically and queued for chair approval.

Pipeline (web/app.py + services/precedent_library.py):
file → extract → chunk → Voyage embed → halacha_extractor → store +
publish progress over the existing Redis SSE channel.

Schema V7 (services/db.py): extends case_law with source_kind +
extraction status fields under a CHECK constraint pinning practice_area
to the three appeals committee domains (rishuy_uvniya, betterment_levy,
compensation_197). New precedent_chunks (vector(1024)) and halachot
tables (vector(1024) over rule_statement, IVFFlat indexes, gin on
practice_areas/subject_tags). Halachot start as pending_review; only
approved/published rows are visible to search_precedent_library.

Agents: legal-writer, legal-researcher, legal-analyst, legal-ceo,
legal-qa get search_precedent_library. legal-writer prompt explains
the three-corpus distinction and CREAC use; legal-qa now verifies that
every cited halacha resolves to an approved row in the corpus.

UI: /precedents page with four tabs — library / semantic search /
pending review (J/K nav, A/R/E shortcuts, badge count) / stats.
Reuses the existing upload-sheet progress + SSE pattern.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web-ui/src/components/precedents/library-list-panel.tsx

@@ -0,0 +1,235 @@
+"use client";
+
+import { useState } from "react";
+import { Trash2, Plus, RefreshCw } from "lucide-react";
+import { toast } from "sonner";
+import {
+  Table, TableBody, TableCell, TableHead, TableHeader, TableRow,
+} from "@/components/ui/table";
+import { Button } from "@/components/ui/button";
+import { Badge } from "@/components/ui/badge";
+import { Input } from "@/components/ui/input";
+import { Skeleton } from "@/components/ui/skeleton";
+import {
+  Select, SelectContent, SelectItem, SelectTrigger, SelectValue,
+} from "@/components/ui/select";
+import {
+  usePrecedents,
+  useDeletePrecedent,
+  useReExtractHalachot,
+  type Precedent,
+  type PracticeArea,
+} from "@/lib/api/precedent-library";
+import { PRACTICE_AREAS, PRECEDENT_LEVELS, practiceAreaShort } from "./practice-area";
+import { PrecedentUploadSheet } from "./precedent-upload-sheet";
+
+function formatDate(iso: string | null) {
+  if (!iso) return "—";
+  try {
+    return new Date(iso).toLocaleDateString("he-IL");
+  } catch {
+    return iso;
+  }
+}
+
+function StatusPill({ p }: { p: Precedent }) {
+  if (p.extraction_status === "failed") {
+    return <Badge variant="outline" className="bg-danger-bg text-danger border-danger/40">נכשל</Badge>;
+  }
+  if (p.extraction_status !== "completed") {
+    return <Badge variant="outline" className="bg-rule-soft text-ink-muted">בעיבוד</Badge>;
+  }
+  if (p.halacha_extraction_status !== "completed") {
+    return <Badge variant="outline" className="bg-gold-wash text-gold-deep">מחלץ הלכות</Badge>;
+  }
+  if (p.halachot_count === 0) {
+    return <Badge variant="outline">ללא הלכות</Badge>;
+  }
+  return (
+    <Badge
+      variant="outline"
+      className="bg-gold-wash text-gold-deep border-gold/40"
+    >
+      {p.approved_count}/{p.halachot_count} מאושרות
+    </Badge>
+  );
+}
+
+function PrecedentRow({ p }: { p: Precedent }) {
+  const del = useDeletePrecedent();
+  const reExtract = useReExtractHalachot();
+
+  const onDelete = async () => {
+    if (!window.confirm(`למחוק את ${p.case_number}? cascade ימחק את ה-chunks וההלכות.`)) return;
+    try {
+      await del.mutateAsync(p.id);
+      toast.success("נמחק");
+    } catch (e) {
+      toast.error(e instanceof Error ? e.message : "שגיאה");
+    }
+  };
+
+  const onReExtract = async () => {
+    try {
+      await reExtract.mutateAsync(p.id);
+      toast.success("חילוץ הלכות החל");
+    } catch (e) {
+      toast.error(e instanceof Error ? e.message : "שגיאה");
+    }
+  };
+
+  return (
+    <TableRow className="border-rule hover:bg-gold-wash/30">
+      <TableCell className="font-semibold text-navy" dir="ltr">
+        {p.case_number}
+      </TableCell>
+      <TableCell className="text-ink">
+        <div className="font-medium">{p.case_name || "—"}</div>
+        <div className="text-[0.72rem] text-ink-muted">{p.court || "—"}</div>
+      </TableCell>
+      <TableCell className="text-ink-muted">{formatDate(p.date)}</TableCell>
+      <TableCell>
+        {p.practice_area ? (
+          <Badge variant="outline" className="bg-navy-soft/40 text-navy border-navy/30">
+            {practiceAreaShort(p.practice_area)}
+          </Badge>
+        ) : (
+          <span className="text-ink-light">—</span>
+        )}
+      </TableCell>
+      <TableCell className="text-ink-muted text-[0.78rem]">
+        {p.precedent_level || "—"}
+      </TableCell>
+      <TableCell>
+        <StatusPill p={p} />
+      </TableCell>
+      <TableCell className="text-end">
+        <div className="flex items-center gap-1 justify-end">
+          <Button
+            variant="ghost" size="sm" onClick={onReExtract}
+            disabled={reExtract.isPending}
+            aria-label="חלץ הלכות מחדש"
+            title="חלץ הלכות מחדש"
+            className="text-ink-muted hover:text-navy"
+          >
+            <RefreshCw className="w-4 h-4" />
+          </Button>
+          <Button
+            variant="ghost" size="sm" onClick={onDelete}
+            disabled={del.isPending}
+            aria-label={`מחק את ${p.case_number}`}
+            className="text-danger hover:text-danger hover:bg-danger-bg"
+          >
+            <Trash2 className="w-4 h-4" />
+          </Button>
+        </div>
+      </TableCell>
+    </TableRow>
+  );
+}
+
+export function LibraryListPanel() {
+  const [practiceArea, setPracticeArea] = useState<PracticeArea>("");
+  const [precedentLevel, setPrecedentLevel] = useState("");
+  const [search, setSearch] = useState("");
+  const [uploadOpen, setUploadOpen] = useState(false);
+
+  const { data, isPending, error } = usePrecedents({
+    practiceArea: practiceArea || undefined,
+    precedentLevel: precedentLevel || undefined,
+    search: search.trim() || undefined,
+    limit: 200,
+  });
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-end gap-3 flex-wrap">
+        <div className="flex-1 min-w-[200px]">
+          <label className="text-[0.78rem] text-ink-muted">חיפוש (מספר תיק / שם / תקציר)</label>
+          <Input
+            value={search}
+            onChange={(e) => setSearch(e.target.value)}
+            placeholder="עע&quot;מ 3975/22"
+            dir="rtl"
+          />
+        </div>
+
+        <div className="min-w-[180px]">
+          <label className="text-[0.78rem] text-ink-muted">תחום</label>
+          <Select value={practiceArea || "_all"} onValueChange={(v) => setPracticeArea(v === "_all" ? "" : v as PracticeArea)}>
+            <SelectTrigger><SelectValue placeholder="הכל" /></SelectTrigger>
+            <SelectContent>
+              <SelectItem value="_all">הכל</SelectItem>
+              {PRACTICE_AREAS.map((a) => (
+                <SelectItem key={a.value} value={a.value}>{a.label}</SelectItem>
+              ))}
+            </SelectContent>
+          </Select>
+        </div>
+
+        <div className="min-w-[170px]">
+          <label className="text-[0.78rem] text-ink-muted">רמת תקדים</label>
+          <Select value={precedentLevel || "_all"} onValueChange={(v) => setPrecedentLevel(v === "_all" ? "" : v)}>
+            <SelectTrigger><SelectValue placeholder="הכל" /></SelectTrigger>
+            <SelectContent>
+              <SelectItem value="_all">הכל</SelectItem>
+              {PRECEDENT_LEVELS.map((l) => (
+                <SelectItem key={l.value} value={l.value}>{l.label}</SelectItem>
+              ))}
+            </SelectContent>
+          </Select>
+        </div>
+
+        <Button onClick={() => setUploadOpen(true)} className="bg-navy text-parchment hover:bg-navy-soft">
+          <Plus className="w-4 h-4 me-1" />
+          העלאת פסיקה
+        </Button>
+      </div>
+
+      {error ? (
+        <div className="rounded bg-danger-bg border border-danger/40 px-6 py-5 text-danger text-center">
+          {error.message}
+        </div>
+      ) : (
+        <div className="rounded-lg border border-rule bg-surface shadow-sm overflow-hidden">
+          <Table>
+            <TableHeader className="bg-rule-soft/60">
+              <TableRow className="border-rule">
+                <TableHead className="text-navy text-right">מס׳ / מראה מקום</TableHead>
+                <TableHead className="text-navy text-right">שם / ערכאה</TableHead>
+                <TableHead className="text-navy text-right">תאריך</TableHead>
+                <TableHead className="text-navy text-right">תחום</TableHead>
+                <TableHead className="text-navy text-right">רמה</TableHead>
+                <TableHead className="text-navy text-right">הלכות</TableHead>
+                <TableHead className="text-navy" />
+              </TableRow>
+            </TableHeader>
+            <TableBody>
+              {isPending ? (
+                [...Array(5)].map((_, i) => (
+                  <TableRow key={i} className="border-rule">
+                    {[...Array(7)].map((_, j) => (
+                      <TableCell key={j}>
+                        <Skeleton className="h-5 w-full" />
+                      </TableCell>
+                    ))}
+                  </TableRow>
+                ))
+              ) : !data?.items.length ? (
+                <TableRow className="border-rule">
+                  <TableCell colSpan={7} className="text-center text-ink-muted py-10">
+                    אין פסיקה בקורפוס. העלה את פסק הדין הראשון.
+                  </TableCell>
+                </TableRow>
+              ) : (
+                data.items.map((p) => <PrecedentRow key={p.id} p={p} />)
+              )}
+            </TableBody>
+          </Table>
+        </div>
+      )}
+
+      <PrecedentUploadSheet open={uploadOpen} onOpenChange={setUploadOpen} />
+    </div>
+  );
+}