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/services/citation_extractor.py

@@ -0,0 +1,434 @@
+"""Internal citation graph extractor (TaskMaster #34).
+
+When Daphna (or any other internal_committee chair) cites another committee
+decision inside the body of a ruling, she uses fairly stable phrases:
+
+    "ונפנה לערר 1110/20 ירושלים שקופה …"
+    "כפי שקבעתי בערר 1041/24 …"
+    "בדומה לעמדתי בהחלטה ערר 8048/24 …"
+    "כפי שנקבע במחוז ת\"א בערר 1234/20 …"
+    "ראה החלטתי בערר 1015-01-24 …"
+
+This module scans the ``full_text`` of internal-committee ``case_law`` rows,
+extracts those citations via regex, tries to link each cited case_number to a
+row already in ``case_law`` (any source_kind), and stores the result in
+``precedent_internal_citations``. Unresolved citations are kept with
+``cited_case_law_id = NULL`` so the chair can see what's missing from the
+corpus (and ``search_internal_decisions`` can surface "cited but absent" gaps).
+
+The result is a *citation graph* that downstream tools (search, researcher
+agent) can join on to surface "decisions cited by this one" alongside
+keyword/semantic hits — without re-running an LLM on every query.
+
+Patterns are *intentionally* permissive: we accept stray Hebrew quote marks
+(both straight ``"`` and curly ``״``), optional district parens, and several
+trigger phrases. False positives are de-duplicated downstream by the
+``UNIQUE (source_case_law_id, cited_case_number)`` constraint and by case-
+number normalization (see ``_normalize_case_number``).
+"""
+
+from __future__ import annotations
+
+import logging
+import re
+from typing import Iterator
+from uuid import UUID
+
+from legal_mcp.services import db
+
+logger = logging.getLogger(__name__)
+
+
+# ── Patterns ─────────────────────────────────────────────────────────
+#
+# Two pattern families:
+#   1. Appeals-committee citations ("ערר" / "בל\"מ") — primary target.
+#      These are the ones we resolve against ``case_law``.
+#   2. Court rulings ("עע\"מ", "בר\"מ", "עמ\"נ", "ע\"א", "בג\"ץ", "רע\"א").
+#      Stored as unlinked rows by default, so the researcher knows the
+#      decision quotes a higher court.
+#
+# Trigger words ("ונפנה", "כפי שקבעתי", "בדומה ל…", "ראה החלטתי",
+# "כפי שנקבע") are *optional* — many citations appear without one (Daphna
+# often introduces a quote with just "כפי שצוין בערר…"). We therefore
+# match the citation core (prefix + number) and capture the surrounding
+# sentence as context.
+#
+# Regex notes:
+#   * Hebrew gershayim/quotation: both straight (") and curly (״) are
+#     accepted via the character class [\"״].
+#   * Case numbers can be NNNN/YY, NNNN-YY, or NNNN-MM-YY (the third form
+#     is the Nevo "filed" format: 1015-01-24 means file #1015 of Jan 2024).
+#   * Optional district paren: ערר (ועדות ערר - תכנון ובנייה ירושלים)
+#     1110/20 — we allow up to 60 chars of parenthetical content.
+#   * \b doesn't behave well with Hebrew, so we anchor by whitespace or
+#     punctuation lookarounds.
+
+_TRIGGER = (
+    r"(?:ונפנה\s+ל|"
+    r"כפי\s+ש(?:קבעתי|נקבע|פסקתי)\s+ב|"
+    r"בדומה\s+ל(?:עמדתי\s+ב)?|"
+    r"ראה\s+(?:את\s+)?(?:החלטתי\s+ב|פסיקת\s+ה?ועדה\s+ב)?|"
+    r"בעניין\s+|"
+    r"בהחלטת(?:י|ה|נו)?\s+ב?)?"
+)
+
+# Optional district / committee parenthetical between the prefix and the
+# case number. Matches things like "(ועדות ערר - תכנון ובנייה ירושלים)"
+# or "(ירושלים)" or "(מרכז)". Up to 80 chars to be safe. Required actual
+# parentheses (the `\(` and `\)` are NOT optional) — otherwise the regex
+# greedily absorbs the next sentence's content and skips intermediate
+# citations like "ראה גם ערר 1041/24 …\nכפי שקבעתי בערר (…) 1110/20".
+_DISTRICT_PAREN = r"(?:\s*\([^)\n]{0,80}\)\s*)?"
+
+# Case-number core: 3-5 digits, optional separator and 2-4 digits (and
+# optional third group for the NNNN-MM-YY format).
+_NUM_RX = r"(\d{3,5}(?:[-/]\d{2,4}(?:[-/]\d{2,4})?)?)"
+
+_PATTERNS = [
+    # 1. Appeals-committee — ערר / בל"מ
+    (
+        "appeals_committee",
+        re.compile(
+            _TRIGGER
+            + r"(ערר|בל[\"״]מ)"
+            + _DISTRICT_PAREN
+            + r"\s*"
+            + _NUM_RX,
+            re.UNICODE,
+        ),
+    ),
+    # 2. Higher courts — עע"מ, בר"מ, עמ"נ, ע"א, בג"ץ, רע"א, דנ"א, בש"א
+    (
+        "court_ruling",
+        re.compile(
+            _TRIGGER
+            + r"(עע[\"״]מ|בר[\"״]מ|עמ[\"״]נ|ע[\"״]א|בג[\"״]ץ|רע[\"״]א|דנ[\"״]א|בש[\"״]א)"
+            + r"\s*"
+            + _NUM_RX,
+            re.UNICODE,
+        ),
+    ),
+]
+
+
+# Context window for storing the match (characters before/after).
+_CTX_BEFORE = 120
+_CTX_AFTER = 240
+
+
+def _normalize_case_number(raw: str) -> str:
+    """Normalize a case-number for matching.
+
+    The same case can appear in the corpus as "1110/20", "1110-20",
+    "ערר 1110/20", "1110-01-20" — different rules for the third form,
+    which is the Nevo file format. We canonicalize by:
+      * stripping non-digit/separator chars
+      * unifying "/" → "-"
+      * lowercasing
+    The result is used only for matching, never for display.
+    """
+    cleaned = re.sub(r"[^\d/\-]", "", raw or "")
+    return cleaned.replace("/", "-").strip("-")
+
+
+def extract_citations_from_text(text: str) -> Iterator[dict]:
+    """Yield citation dicts extracted from ``text``.
+
+    Each dict has:
+        prefix: matched prefix (ערר / בל\"מ / עע\"מ / …)
+        case_number: raw number as captured
+        case_number_norm: normalized (slashes → dashes, digits only)
+        raw: the full matched span
+        context: ±300 chars surrounding the match (whitespace normalized)
+        pattern_kind: 'appeals_committee' or 'court_ruling'
+    """
+    if not text:
+        return
+    seen: set[tuple[str, str]] = set()
+    for kind, pattern in _PATTERNS:
+        for m in pattern.finditer(text):
+            # The `_TRIGGER` is wrapped in (?:...) so it does not add a
+            # capture group; group(1) is the prefix, group(2) is the number.
+            prefix = (m.group(1) or "").strip()
+            number = (m.group(2) or "").strip()
+            if not prefix or not number:
+                continue
+            norm = _normalize_case_number(number)
+            if not norm:
+                continue
+            key = (kind, norm)
+            if key in seen:
+                continue
+            seen.add(key)
+
+            start = max(0, m.start() - _CTX_BEFORE)
+            end = min(len(text), m.end() + _CTX_AFTER)
+            context = text[start:end].replace("\n", " ").strip()
+            context = re.sub(r"\s+", " ", context)
+
+            yield {
+                "prefix": prefix,
+                "case_number": number,
+                "case_number_norm": norm,
+                "raw": m.group(0).strip(),
+                "context": context[:1000],
+                "pattern_kind": kind,
+            }
+
+
+async def _resolve_case_law_id(case_number_norm: str) -> UUID | None:
+    """Try to resolve a normalized citation to an existing case_law row.
+
+    Strategy:
+      1. Exact match on normalized case_number column (after rewriting
+         existing case_numbers the same way).
+      2. Substring match — the corpus often stores the full Nevo header
+         ("ערר ‏(‏ועדות ערר - תכנון ובנייה ירושלים‏)‏ 1110/20 …"), so we
+         search by ``case_number ILIKE '%1110/20%' OR '%1110-20%'``.
+
+    Returns None if no row matches.
+    """
+    if not case_number_norm:
+        return None
+    pool = await db.get_pool()
+    # Build the two raw forms (with slash and with dash) for substring match.
+    parts = case_number_norm.split("-")
+    if len(parts) >= 2:
+        slash_form = "/".join(parts[:2]) if len(parts) == 2 else parts[0] + "/" + parts[-1]
+    else:
+        slash_form = case_number_norm
+    dash_form = case_number_norm
+
+    async with pool.acquire() as conn:
+        # Substring match on either form (covers full Nevo headers and short forms).
+        row = await conn.fetchrow(
+            """
+            SELECT id FROM case_law
+             WHERE case_number ILIKE $1 OR case_number ILIKE $2
+             ORDER BY (source_kind = 'internal_committee') DESC,
+                      LENGTH(case_number) ASC
+             LIMIT 1
+            """,
+            f"%{slash_form}%",
+            f"%{dash_form}%",
+        )
+    return UUID(str(row["id"])) if row else None
+
+
+async def extract_and_store(case_law_id: UUID) -> dict:
+    """Extract citations from a single ``case_law`` row's ``full_text``,
+    resolve them against the corpus, and INSERT into
+    ``precedent_internal_citations`` (ON CONFLICT DO NOTHING).
+
+    Returns: {extracted: N, linked: M, new: K, skipped: S}
+        extracted — total distinct citations found in the text
+        linked    — how many resolved to an existing case_law row
+        new       — rows actually inserted (not pre-existing)
+        skipped   — citations skipped (self-citation, already stored)
+    """
+    pool = await db.get_pool()
+    async with pool.acquire() as conn:
+        row = await conn.fetchrow(
+            "SELECT id, case_number, full_text FROM case_law WHERE id = $1",
+            case_law_id,
+        )
+    if not row:
+        return {"extracted": 0, "linked": 0, "new": 0, "skipped": 0, "error": "not_found"}
+
+    text = row["full_text"] or ""
+    own_norm = _normalize_case_number(row["case_number"] or "")
+
+    extracted = 0
+    linked = 0
+    new_count = 0
+    skipped = 0
+
+    for cit in extract_citations_from_text(text):
+        extracted += 1
+        if cit["case_number_norm"] == own_norm:
+            # Self-citation (e.g. document headers repeating the case number).
+            skipped += 1
+            continue
+
+        cited_id = await _resolve_case_law_id(cit["case_number_norm"])
+        if cited_id is not None and cited_id == case_law_id:
+            skipped += 1
+            continue
+        if cited_id is not None:
+            linked += 1
+
+        async with pool.acquire() as conn:
+            result = await conn.execute(
+                """
+                INSERT INTO precedent_internal_citations (
+                    source_case_law_id, cited_case_number, cited_case_law_id,
+                    match_context, match_pattern, confidence
+                )
+                VALUES ($1, $2, $3, $4, $5, $6)
+                ON CONFLICT (source_case_law_id, cited_case_number) DO NOTHING
+                """,
+                case_law_id,
+                f"{cit['prefix']} {cit['case_number']}",
+                cited_id,
+                cit["context"],
+                cit["pattern_kind"],
+                0.90 if cited_id is not None else 0.75,
+            )
+        # asyncpg execute returns 'INSERT 0 N' — N is rows inserted.
+        try:
+            n_inserted = int(result.split()[-1])
+        except (ValueError, IndexError):
+            n_inserted = 0
+        if n_inserted == 1:
+            new_count += 1
+        else:
+            skipped += 1
+
+    return {
+        "extracted": extracted,
+        "linked": linked,
+        "new": new_count,
+        "skipped": skipped,
+    }
+
+
+async def extract_all_internal_committee(
+    chair_name_filter: str = "",
+    limit: int = 0,
+) -> dict:
+    """Run extraction over every internal-committee row in ``case_law``.
+
+    Args:
+        chair_name_filter: if non-empty, restrict to rows where chair_name
+            matches (exact match). Useful for running on Daphna only.
+        limit: hard cap on number of rows processed (0 = no cap).
+
+    Returns: summary dict with per-row counts and aggregate totals.
+    """
+    pool = await db.get_pool()
+    conditions = ["source_kind = 'internal_committee'", "full_text <> ''"]
+    params: list = []
+    if chair_name_filter:
+        conditions.append("chair_name = $1")
+        params.append(chair_name_filter)
+    where = " WHERE " + " AND ".join(conditions)
+    limit_clause = f" LIMIT {int(limit)}" if limit and limit > 0 else ""
+    sql = f"SELECT id, case_number FROM case_law{where} ORDER BY created_at{limit_clause}"
+
+    async with pool.acquire() as conn:
+        rows = await conn.fetch(sql, *params)
+
+    totals = {
+        "processed": 0,
+        "extracted": 0,
+        "linked": 0,
+        "new": 0,
+        "skipped": 0,
+        "failed": 0,
+        "chair_name_filter": chair_name_filter,
+        "row_count": len(rows),
+    }
+
+    for r in rows:
+        try:
+            stats = await extract_and_store(UUID(str(r["id"])))
+            totals["processed"] += 1
+            totals["extracted"] += stats.get("extracted", 0)
+            totals["linked"] += stats.get("linked", 0)
+            totals["new"] += stats.get("new", 0)
+            totals["skipped"] += stats.get("skipped", 0)
+        except Exception as e:
+            logger.exception("citation extraction failed for %s: %s", r["case_number"], e)
+            totals["failed"] += 1
+
+    return totals
+
+
+async def list_citations_for_case_law(
+    case_law_id: UUID,
+    linked_only: bool = False,
+) -> list[dict]:
+    """Return all citations *from* the given case_law row (outgoing edges)."""
+    pool = await db.get_pool()
+    where = "pic.source_case_law_id = $1"
+    if linked_only:
+        where += " AND pic.cited_case_law_id IS NOT NULL"
+    sql = f"""
+        SELECT pic.id::text AS id,
+               pic.cited_case_number,
+               pic.cited_case_law_id::text AS cited_case_law_id,
+               pic.match_context,
+               pic.match_pattern,
+               pic.confidence::float AS confidence,
+               pic.created_at,
+               cl.case_number AS target_case_number,
+               cl.case_name AS target_case_name,
+               cl.chair_name AS target_chair_name,
+               cl.district AS target_district
+          FROM precedent_internal_citations pic
+          LEFT JOIN case_law cl ON cl.id = pic.cited_case_law_id
+         WHERE {where}
+         ORDER BY pic.created_at
+    """
+    async with pool.acquire() as conn:
+        rows = await conn.fetch(sql, case_law_id)
+    return [dict(r) for r in rows]
+
+
+async def list_citations_to_case_law(case_law_id: UUID) -> list[dict]:
+    """Return all citations *to* the given case_law row (incoming edges).
+
+    Useful for "which Daphna decisions cite this ruling?" queries.
+    """
+    pool = await db.get_pool()
+    sql = """
+        SELECT pic.id::text AS id,
+               pic.source_case_law_id::text AS source_case_law_id,
+               pic.cited_case_number,
+               pic.match_context,
+               pic.match_pattern,
+               pic.confidence::float AS confidence,
+               pic.created_at,
+               cl.case_number AS source_case_number,
+               cl.case_name AS source_case_name,
+               cl.chair_name AS source_chair_name,
+               cl.district AS source_district
+          FROM precedent_internal_citations pic
+          JOIN case_law cl ON cl.id = pic.source_case_law_id
+         WHERE pic.cited_case_law_id = $1
+         ORDER BY pic.created_at DESC
+    """
+    async with pool.acquire() as conn:
+        rows = await conn.fetch(sql, case_law_id)
+    return [dict(r) for r in rows]
+
+
+async def get_cited_case_law_ids(source_case_law_ids: list[UUID]) -> dict[str, list[str]]:
+    """Bulk-fetch outgoing citation case_law_ids for the given source rows.
+
+    Returns: {source_case_law_id (str): [cited_case_law_id (str), ...]} —
+        only including linked (resolved) citations.
+
+    Used by search.search_internal_decisions(include_cited_by=True) to
+    expand result sets with the precedents the hits themselves cite,
+    without running a separate roundtrip per row.
+    """
+    if not source_case_law_ids:
+        return {}
+    pool = await db.get_pool()
+    async with pool.acquire() as conn:
+        rows = await conn.fetch(
+            """
+            SELECT source_case_law_id::text AS source_id,
+                   cited_case_law_id::text AS cited_id
+              FROM precedent_internal_citations
+             WHERE source_case_law_id = ANY($1::uuid[])
+               AND cited_case_law_id IS NOT NULL
+            """,
+            list(source_case_law_ids),
+        )
+    out: dict[str, list[str]] = {}
+    for r in rows:
+        out.setdefault(r["source_id"], []).append(r["cited_id"])
+    return out