fix(precedents): wrap citation column + extractor fills source_type

Two follow-ups after running the metadata extractor on 403-17:

1. Library table: shadcn TableCell defaults to whitespace-nowrap and
   the table wrapper has overflow-x-auto, so the long citation forced
   a horizontal scrollbar inside the row. Override on the citation
   cell only — whitespace-normal + break-words + min/max-w to keep the
   column readable. Same for the case-name cell. Row aligns to top so
   wrapping doesn't push neighbours up.

2. Extractor now also fills source_type (court_ruling /
   appeals_committee). The previous round added decision_date_iso,
   precedent_level, and court but left source_type empty. Same
   closed-enum + merge-only-if-empty policy.

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

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

@@ -83,11 +83,20 @@ function PrecedentRow({
   };
 
   return (
-    <TableRow className="border-rule hover:bg-gold-wash/30">
-      <TableCell className="font-semibold text-navy text-right" dir="rtl">
+    <TableRow className="border-rule hover:bg-gold-wash/30 align-top">
+      <TableCell
+        /* shadcn TableCell defaults to whitespace-nowrap which forces the
+         * row wider than the container; for this column we want the long
+         * citation to wrap onto a second line instead of triggering the
+         * horizontal scroll on the table wrapper. min-w/max-w keeps the
+         * column wide enough to avoid awkward 2-word lines while leaving
+         * room for the other columns. */
+        className="font-semibold text-navy text-right whitespace-normal break-words min-w-[280px] max-w-[420px] py-3"
+        dir="rtl"
+      >
         <span dir="auto">{cleanCitation(p.case_number)}</span>
       </TableCell>
-      <TableCell className="text-ink">
+      <TableCell className="text-ink whitespace-normal break-words max-w-[260px] py-3">
         <div className="font-medium">{cleanCitation(p.case_name)}</div>
         {p.court ? (
           <div className="text-[0.72rem] text-ink-muted">{p.court}</div>