feat: #34 citation graph + #32 wide-modal precedent edit + #13 verify

## #34 — Daphna's internal citation graph

New schema V16 (V15 was already used by proceeding_type): table
``precedent_internal_citations`` (source→cited, with cited_case_law_id
nullable for citations whose target isn't in the corpus yet) + 3
indexes (source, target, unlinked).

New service ``citation_extractor.py`` with regex patterns for ערר /
בל"מ / עע"מ / בר"מ / עמ"נ / ע"א / בג"ץ / רע"א — accepts both ``\/``
and ``-`` separators, requires actual parenthesized district label
to avoid greedy mid-paragraph captures. Resolves citations against
``case_law.case_number`` substring; default confidence 0.90 linked,
0.75 unlinked. ON CONFLICT DO NOTHING on (source, cited_case_number).

3 new MCP tools: ``extract_internal_citations``,
``list_internal_citations``, ``list_incoming_citations``. Optional
flag ``include_cited_by=True`` on ``search_internal_decisions``
appends cited-by candidates as ``match_type='cited_by'`` stubs.

Bulk-extracted from 40 internal_committee rows authored by דפנה תמיר:
**353 distinct citations, 348 stored, 96 linked / 252 unlinked**.
Top citers: 1079/24 (30), 1024/24 (19), 1009/25 (18). Top unlinked
target: ע"א 3213/97 (cited 5x) — natural #35 candidates.

## #32 — Wide-modal precedent edit

`precedent-edit-sheet.tsx`: ``<Sheet side="left">`` → centered
``<Dialog>`` with ``sm:max-w-4xl`` ``max-h-[90vh]`` ``overflow-y-auto``.
Component API unchanged so existing callers
(`/precedents/[id]/page.tsx`, `library-list-panel.tsx`) work as-is.
RTL preserved. Mobile falls back to near-full-width via shadcn default.

## #13 — 403/17 verification

`case_law e151fc25-...` (אהרון ברק - תכנית רחביה) already in perfect
shape after Stage A work: all metadata fields populated, 351 halachot
with avg_conf=0.864 (well above 0.78 threshold). No re-extraction
needed; closing task as verified.

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

mcp-server/src/legal_mcp/tools/citations.py

@@ -0,0 +1,135 @@
+"""MCP tools for the internal-decisions citation graph (TaskMaster #34).
+
+The citation graph captures pointers between Daphna's (and other internal
+committee chairs') decisions: when one ruling cites another, ``precedent_
+internal_citations`` records the edge — resolved against ``case_law`` when
+the cited row exists, kept as a stub when it doesn't.
+
+Three tools:
+
+- ``extract_internal_citations`` — run regex extraction on one row (by id) or
+  on every internal-committee row filtered by chair (e.g. Daphna only).
+  Idempotent: re-running does not duplicate rows (ON CONFLICT DO NOTHING).
+- ``list_internal_citations`` — outgoing edges from a source row. Optional
+  ``linked_only`` filter for rows resolved to existing case_law UUIDs.
+- ``list_incoming_citations`` — incoming edges to a target row ("which
+  Daphna decisions cite this ruling?").
+
+These tools are *manual triggers*. The pipeline runs them after a new
+internal-decision upload, but the chair / researcher can also re-run on
+demand (for example after fixing OCR or after uploading a previously-
+missing decision so that newer rows now link to it).
+"""
+
+from __future__ import annotations
+
+import json
+from uuid import UUID
+
+from legal_mcp.services import citation_extractor
+
+
+def _ok(payload) -> str:
+    return json.dumps(payload, ensure_ascii=False, indent=2, default=str)
+
+
+def _err(msg: str) -> str:
+    return json.dumps({"error": msg}, ensure_ascii=False)
+
+
+async def extract_internal_citations(
+    case_law_id: str = "",
+    chair_name: str = "",
+    limit: int = 0,
+) -> str:
+    """חילוץ ציטוטים פנימיים מהחלטות ועדת ערר ושמירה ב-precedent_internal_citations.
+
+    Args:
+        case_law_id: UUID של החלטה ספציפית. אם ריק וגם chair_name ריק — מריץ
+            על כל ההחלטות internal_committee. אם מסופק, חייב לעבור על שורה אחת
+            בלבד (משתמש בזה אחרי upload).
+        chair_name: שם יו"ר (כגון 'דפנה תמיר'). מסנן את האצווה. ריק = כל היו"רים.
+        limit: עליון על מספר רשומות שיעובדו (0 = ללא הגבלה). שימושי לבדיקה.
+
+    הכלי איידמפוטנטי — ON CONFLICT DO NOTHING על (source_case_law_id, cited_case_number).
+    מחזיר סטטיסטיקה: extracted, linked, new, skipped, failed.
+    """
+    if case_law_id.strip() and chair_name.strip():
+        return _err("יש לספק case_law_id או chair_name, לא שניהם")
+
+    if case_law_id.strip():
+        try:
+            cl_uuid = UUID(case_law_id.strip())
+        except ValueError:
+            return _err("case_law_id לא תקין")
+        try:
+            stats = await citation_extractor.extract_and_store(cl_uuid)
+        except Exception as e:
+            return _err(str(e))
+        return _ok(stats)
+
+    try:
+        stats = await citation_extractor.extract_all_internal_committee(
+            chair_name_filter=chair_name.strip(),
+            limit=int(limit) if limit else 0,
+        )
+    except Exception as e:
+        return _err(str(e))
+    return _ok(stats)
+
+
+async def list_internal_citations(
+    case_law_id: str = "",
+    linked_only: bool = False,
+    limit: int = 50,
+) -> str:
+    """רשימת ציטוטים יוצאים מהחלטה (מה ההחלטה הזו מצטטת).
+
+    Args:
+        case_law_id: UUID של ה-case_law (חובה).
+        linked_only: True = רק ציטוטים שקושרו ל-case_law קיים בקורפוס.
+        limit: עליון על מספר תוצאות (default 50).
+
+    Returns: JSON עם list של ציטוטים, כולל target_case_number/name/chair
+        כשהם linked. אם linked_only=False, ציטוטים בלתי קושרים יחזרו עם
+        cited_case_law_id=null וניתן להעלות אותם דרך internal_decision_upload.
+    """
+    if not case_law_id.strip():
+        return _err("case_law_id חובה")
+    try:
+        cl_uuid = UUID(case_law_id.strip())
+    except ValueError:
+        return _err("case_law_id לא תקין")
+    try:
+        rows = await citation_extractor.list_citations_for_case_law(
+            cl_uuid, linked_only=bool(linked_only),
+        )
+    except Exception as e:
+        return _err(str(e))
+    return _ok({"items": rows[: max(1, int(limit))], "count": len(rows)})
+
+
+async def list_incoming_citations(
+    case_law_id: str = "",
+    limit: int = 50,
+) -> str:
+    """רשימת ציטוטים נכנסים אל החלטה (אילו החלטות מצטטות אותה).
+
+    שימוש: רוצים לדעת אילו החלטות של דפנה הסתמכו על פסק דין מסוים?
+    מעבירים את ה-case_law_id של פסק הדין הזה.
+
+    Args:
+        case_law_id: UUID של ה-target case_law (חובה).
+        limit: עליון על מספר תוצאות.
+    """
+    if not case_law_id.strip():
+        return _err("case_law_id חובה")
+    try:
+        cl_uuid = UUID(case_law_id.strip())
+    except ValueError:
+        return _err("case_law_id לא תקין")
+    try:
+        rows = await citation_extractor.list_citations_to_case_law(cl_uuid)
+    except Exception as e:
+        return _err(str(e))
+    return _ok({"items": rows[: max(1, int(limit))], "count": len(rows)})