Merge S4-10: mark scheme editor + SpecPoint picker

- Add /exam-marker/:templateId/marks route with MarkSchemePage
- Per-Part mark scheme editor: points/levels/parts/checklist/free forms
- SpecPoint picker via GET /api/exam/specs/{spec_code}/points (falls back to manual spec_ref when endpoint 404s)
- Manual neo4j-sync button; ASSESSES edge verified in cc.public.exams
- Edit marks button on each template card in dashboard
- Merge-resolved: AppRoutes, index.ts, exam.types.ts, ExamDashboardPage (kept grouped UI + added Edit marks button)

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

src/types/exam.types.ts

@@ -31,6 +31,42 @@ export interface CreateTemplatePayload {
   institute_id?: string;
 }
 
+export type MarkSchemeType = 'points' | 'levels' | 'parts' | 'checklist' | 'free';
+
+export interface MarkSchemePoint {
+  mark: number;
+  text: string;
+}
+
+export interface MarkSchemeLevel {
+  level: string;
+  min: number;
+  max: number;
+  descriptor: string;
+}
+
+export interface MarkSchemePart {
+  label: string;
+  marks: number;
+  guidance: string;
+}
+
+export interface MarkSchemeChecklistItem {
+  text: string;
+  marks: number;
+}
+
+export interface MarkScheme {
+  type?: MarkSchemeType;
+  points?: MarkSchemePoint[];
+  levels?: MarkSchemeLevel[];
+  parts?: MarkSchemePart[];
+  checklist?: MarkSchemeChecklistItem[];
+  text?: string;
+  notes?: string;
+  [key: string]: unknown;
+}
+
 export interface UpdateTemplateMetaPayload {
   title?: string;
   subject?: string | null;
@@ -48,7 +84,7 @@ export interface ExamQuestion {
   max_marks: number;
   answer_type: string | null;
   mcq_options: unknown | null;
-  mark_scheme: Record<string, unknown>;
+  mark_scheme: MarkScheme;
   is_container: boolean;
   spec_ref: string | null;
   bounds?: Record<string, number> | null;
@@ -140,3 +176,28 @@ export interface TemplateReplacePayload {
     confirmed?: boolean;
   }>;
 }
+
+export interface PatchQuestionPayload {
+  label?: string;
+  order?: number;
+  max_marks?: number;
+  answer_type?: 'written' | 'mcq' | 'short' | 'diagram' | null;
+  mcq_options?: unknown;
+  mark_scheme?: MarkScheme;
+  is_container?: boolean;
+  spec_ref?: string | null;
+}
+
+export interface SpecPoint {
+  uid?: string;
+  uuid_string?: string;
+  ref: string;
+  description: string;
+  spec_code: string;
+  exam_board_code?: string;
+}
+
+export interface Neo4jSyncResult {
+  status: string;
+  projection?: Record<string, unknown>;
+}