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>

web-ui/src/components/wizard/case-wizard.tsx

@@ -321,6 +321,7 @@ export function CaseWizard() {
             </Button>
             {isLast ? (
               <Button
+                key="submit-btn"
                 type="submit"
                 disabled={mutate.isPending}
                 className="bg-navy hover:bg-navy-soft text-parchment"
@@ -329,6 +330,7 @@ export function CaseWizard() {
               </Button>
             ) : (
               <Button
+                key="next-btn"
                 type="button"
                 onClick={goNext}
                 className="bg-navy hover:bg-navy-soft text-parchment"