Add chair feedback system and content checklists for block-yod

Backend changes cherry-picked from ui-rewrite branch to enable
feedback API endpoints for the Next.js staging UI.

- chair_feedback DB table + API endpoints (GET/POST/PATCH)
- Content checklists by appeal subtype injected into block-yod prompt
- MCP tools for recording and listing chair feedback
- Corpus analysis documentation (24 decisions)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/app.py

@@ -2436,6 +2436,133 @@ async def api_reprocess_document(case_number: str, doc_id: str):
     return {"status": "reprocessing"}
 
 
+# ── Chair feedback endpoints ──────────────────────────────────────
+
+
+@app.get("/api/feedback")
+async def api_list_feedback(
+    case_number: str = "",
+    category: str = "",
+    unresolved_only: bool = False,
+):
+    """List chair feedback, optionally filtered by case/category."""
+    case_id = None
+    if case_number:
+        case = await db.get_case_by_number(case_number)
+        if case:
+            case_id = UUID(case["id"])
+
+    feedbacks = await db.list_chair_feedback(
+        case_id=case_id,
+        category=category or None,
+        unresolved_only=unresolved_only,
+    )
+
+    items = []
+    # Build case_number lookup
+    case_numbers: dict[str, str] = {}
+    pool = await db.get_pool()
+    for fb in feedbacks:
+        cid = fb.get("case_id")
+        cn = ""
+        if cid and str(cid) not in case_numbers:
+            async with pool.acquire() as conn:
+                row = await conn.fetchrow(
+                    "SELECT case_number, title FROM cases WHERE id = $1", cid,
+                )
+                if row:
+                    case_numbers[str(cid)] = row["case_number"]
+        if cid:
+            cn = case_numbers.get(str(cid), "")
+
+        items.append({
+            "id": str(fb["id"]),
+            "case_id": str(fb["case_id"]) if fb["case_id"] else None,
+            "case_number": cn,
+            "block_id": fb["block_id"],
+            "category": fb["category"],
+            "feedback_text": fb["feedback_text"],
+            "lesson_extracted": fb["lesson_extracted"],
+            "resolved": fb["resolved"],
+            "applied_to": fb.get("applied_to", []),
+            "created_at": fb["created_at"].isoformat() if fb.get("created_at") else None,
+        })
+
+    return items
+
+
+@app.post("/api/feedback")
+async def api_create_feedback(
+    case_number: str = Form(""),
+    block_id: str = Form("block-yod"),
+    feedback_text: str = Form(...),
+    category: str = Form("missing_content"),
+    lesson_extracted: str = Form(""),
+):
+    """Record a new chair feedback entry."""
+    case_id = None
+    if case_number:
+        case = await db.get_case_by_number(case_number)
+        if case:
+            case_id = UUID(case["id"])
+
+    valid_categories = [
+        "missing_content", "wrong_tone", "wrong_structure",
+        "factual_error", "style", "other",
+    ]
+    if category not in valid_categories:
+        raise HTTPException(400, f"קטגוריה לא חוקית. אפשרויות: {', '.join(valid_categories)}")
+
+    feedback_id = await db.record_chair_feedback(
+        case_id=case_id,
+        block_id=block_id,
+        feedback_text=feedback_text,
+        category=category,
+        lesson_extracted=lesson_extracted,
+    )
+
+    return {"id": str(feedback_id), "status": "created"}
+
+
+@app.post("/api/feedback/json")
+async def api_create_feedback_json(body: dict):
+    """Record a new chair feedback entry (JSON body)."""
+    case_number = body.get("case_number", "")
+    case_id = None
+    if case_number:
+        case = await db.get_case_by_number(case_number)
+        if case:
+            case_id = UUID(case["id"])
+
+    valid_categories = [
+        "missing_content", "wrong_tone", "wrong_structure",
+        "factual_error", "style", "other",
+    ]
+    category = body.get("category", "missing_content")
+    if category not in valid_categories:
+        raise HTTPException(400, f"קטגוריה לא חוקית. אפשרויות: {', '.join(valid_categories)}")
+
+    feedback_id = await db.record_chair_feedback(
+        case_id=case_id,
+        block_id=body.get("block_id", "block-yod"),
+        feedback_text=body.get("feedback_text", ""),
+        category=category,
+        lesson_extracted=body.get("lesson_extracted", ""),
+    )
+
+    return {"id": str(feedback_id), "status": "created"}
+
+
+@app.patch("/api/feedback/{feedback_id}/resolve")
+async def api_resolve_feedback(feedback_id: str, body: dict):
+    """Mark feedback as resolved."""
+    await db.resolve_chair_feedback(
+        feedback_id=UUID(feedback_id),
+        applied_to=body.get("applied_to", []),
+    )
+    return {"status": "resolved"}
+
+
 # ── Background Processing ─────────────────────────────────────────