feat: fix wizard step-skip bug + extend case edit with all fields + Paperclip title sync

- Fix keyboard navigation bug: React was reusing the submit button DOM element
  when transitioning "הבא" → "צור תיק", retaining focus and causing Enter to
  auto-submit step 3. Added key props to force element replacement.

- CaseEditDialog now covers all wizard fields: appellants, respondents,
  property_address, permit_number (in addition to existing title, subject,
  hearing_date, expected_outcome, notes).

- When case title changes, Paperclip project name is updated in background
  via new update_project_name() in paperclip_client.py.

- Extended CaseUpdateRequest, case_update MCP tool, and caseUpdateSchema
  to carry the new fields end-to-end.

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

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

@@ -271,6 +271,10 @@ async def case_update(
     decision_date: str = "",
     tags: list[str] | None = None,
     expected_outcome: str = "",
+    appellants: list[str] | None = None,
+    respondents: list[str] | None = None,
+    property_address: str = "",
+    permit_number: str = "",
 ) -> str:
     """עדכון פרטי תיק.
 
@@ -284,6 +288,10 @@ async def case_update(
         decision_date: תאריך החלטה (YYYY-MM-DD)
         tags: תגיות
         expected_outcome: תוצאה צפויה (rejection/partial_acceptance/full_acceptance/betterment_levy)
+        appellants: רשימת עוררים חדשה
+        respondents: רשימת משיבים חדשה
+        property_address: כתובת נכס חדשה
+        permit_number: מספר תכנית/בקשה חדש
     """
     from datetime import date as date_type
 
@@ -322,6 +330,14 @@ async def case_update(
         fields["tags"] = tags
     if expected_outcome:
         fields["expected_outcome"] = expected_outcome
+    if appellants is not None:
+        fields["appellants"] = appellants
+    if respondents is not None:
+        fields["respondents"] = respondents
+    if property_address:
+        fields["property_address"] = property_address
+    if permit_number:
+        fields["permit_number"] = permit_number
 
     updated = await db.update_case(UUID(case["id"]), **fields)