fix(precedents): separate court rulings from committee decisions correctly

- DB: add 'all_committees' virtual source_kind covering internal_committee
  + external_upload appeals_committee rows in one query
- DB: stats now count all case_law rows (not just external_upload),
  fixing the precedents_total that excluded 44 internal-committee records
- UI: courts table filters to source_type=court_ruling only;
  committees table uses the new all_committees query

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

mcp-server/src/legal_mcp/services/db.py

@@ -2052,9 +2052,19 @@ async def list_external_case_law(
     offset: int = 0,
     source_kind: str = "external_upload",
 ) -> list[dict]:
-    """List chair-uploaded precedents, with simple filters."""
+    """List chair-uploaded precedents, with simple filters.
+
+    source_kind="all_committees" expands to: source_kind='internal_committee'
+    OR (source_kind='external_upload' AND source_type='appeals_committee').
+    """
     pool = await get_pool()
-    conditions = [f"source_kind = '{source_kind}'"]
+    if source_kind == "all_committees":
+        conditions = [
+            "(source_kind = 'internal_committee' OR "
+            "(source_kind = 'external_upload' AND source_type = 'appeals_committee'))"
+        ]
+    else:
+        conditions = [f"source_kind = '{source_kind}'"]
     params: list = []
     idx = 1
     if practice_area:
@@ -2488,19 +2498,17 @@ async def precedent_library_stats() -> dict:
     pool = await get_pool()
     async with pool.acquire() as conn:
         total = await conn.fetchval(
-            "SELECT COUNT(*) FROM case_law WHERE source_kind = 'external_upload'"
+            "SELECT COUNT(*) FROM case_law"
         )
         by_practice = await conn.fetch(
             """SELECT practice_area, COUNT(*) AS n
                FROM case_law
-               WHERE source_kind = 'external_upload'
                GROUP BY practice_area
                ORDER BY n DESC"""
         )
         by_level = await conn.fetch(
             """SELECT precedent_level, COUNT(*) AS n
                FROM case_law
-               WHERE source_kind = 'external_upload'
                GROUP BY precedent_level
                ORDER BY n DESC"""
         )

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

@@ -313,8 +313,8 @@ export function LibraryListPanel() {
     limit: 200,
   };
 
-  const courts = usePrecedents({ ...sharedFilters, sourceKind: "external_upload" });
-  const committee = usePrecedents({ ...sharedFilters, sourceKind: "internal_committee" });
+  const courts = usePrecedents({ ...sharedFilters, sourceKind: "external_upload", sourceType: "court_ruling" });
+  const committee = usePrecedents({ ...sharedFilters, sourceKind: "all_committees" });
 
   return (
     <div className="space-y-8">