feat(precedents): split library into court rulings + appeals committee tables

- /api/precedent-library now accepts source_kind param (default external_upload)
- list_external_case_law returns chair_name/district fields
- LibraryListPanel renders two separate tables with appropriate columns
- internal_decisions migration: added queue_halachot param to defer extraction
- Fixed practice_area mapping from style_corpus (appeals_committee → proper enum)

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

web-ui/src/lib/api/precedent-library.ts

@@ -46,6 +46,8 @@ export type Precedent = {
   headnote: string;
   subject_tags: string[];
   source_kind: string;
+  chair_name: string | null;
+  district: string | null;
   extraction_status: string;
   halacha_extraction_status: string;
   metadata_extraction_requested_at: string | null;
@@ -137,6 +139,7 @@ export type ListFilters = {
   court?: string;
   precedentLevel?: string;
   sourceType?: SourceType;
+  sourceKind?: string;
   search?: string;
   limit?: number;
   offset?: number;
@@ -164,6 +167,7 @@ export function usePrecedents(filters: ListFilters = {}) {
       if (filters.court) p.set("court", filters.court);
       if (filters.precedentLevel) p.set("precedent_level", filters.precedentLevel);
       if (filters.sourceType) p.set("source_type", filters.sourceType);
+      if (filters.sourceKind) p.set("source_kind", filters.sourceKind);
       if (filters.search) p.set("search", filters.search);
       if (filters.limit) p.set("limit", String(filters.limit));
       if (filters.offset) p.set("offset", String(filters.offset));