feat: Phase 4 — inspection sessions (create, execute, complete)

Backend:
- InspectionSession + InspectionRecord models with alembic migration
- 6 API endpoints: create, list, get detail, save records, complete, delete
- Auto pass/fail judgment for numeric (spec range) and boolean items
- Completed inspections are immutable, required items enforced on complete
- 14 new tests (total 53/53 passed)

Frontend:
- Inspection list page with in_progress/completed tabs
- Template select modal for starting new inspections
- Inspection execution page with data-type-specific inputs
- Auto-save with 1.5s debounce, manual save button
- Completion modal with notes and required item validation
- Read-only view for completed inspections
- Pass/fail badges and color-coded item cards

Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>

dashboard/lib/hooks.ts

@@ -1,6 +1,6 @@
 import useSWR from 'swr';
 import { fetcher, getTenantUrl } from './api';
-import type { Tenant, Machine, MachineDetail, EquipmentPart, InspectionTemplate } from './types';
+import type { Tenant, Machine, MachineDetail, EquipmentPart, InspectionTemplate, InspectionSession } from './types';
 
 export function useTenants() {
   const { data, error, isLoading, mutate } = useSWR<{ tenants: Tenant[] }>(
@@ -108,3 +108,39 @@ export function useTemplate(tenantId?: string, templateId?: string) {
     mutate,
   };
 }
+
+export function useInspections(tenantId?: string, status?: string, templateId?: string) {
+  const params = new URLSearchParams();
+  if (status) params.set('status', status);
+  if (templateId) params.set('template_id', templateId);
+  const qs = params.toString();
+  const url = tenantId ? `/api/${tenantId}/inspections${qs ? `?${qs}` : ''}` : null;
+  const { data, error, isLoading, mutate } = useSWR<{ inspections: InspectionSession[] }>(
+    url,
+    fetcher,
+    { refreshInterval: 10000, dedupingInterval: 2000 },
+  );
+
+  return {
+    inspections: data?.inspections || [],
+    error,
+    isLoading,
+    mutate,
+  };
+}
+
+export function useInspection(tenantId?: string, inspectionId?: string) {
+  const url = tenantId && inspectionId ? `/api/${tenantId}/inspections/${inspectionId}` : null;
+  const { data, error, isLoading, mutate } = useSWR<InspectionSession>(
+    url,
+    fetcher,
+    { refreshInterval: 5000, dedupingInterval: 2000 },
+  );
+
+  return {
+    inspection: data ?? null,
+    error,
+    isLoading,
+    mutate,
+  };
+}

dashboard/lib/types.ts

@@ -81,6 +81,57 @@ export interface InspectionTemplateItem {
   created_at: string | null;
 }
 
+export interface InspectionRecord {
+  id: string;
+  session_id: string;
+  template_item_id: string;
+  value_numeric: number | null;
+  value_boolean: boolean | null;
+  value_text: string | null;
+  value_select: string | null;
+  is_pass: boolean | null;
+  recorded_at: string | null;
+  created_at: string | null;
+  updated_at: string | null;
+}
+
+export interface InspectionItemDetail {
+  record: InspectionRecord;
+  item: {
+    id: string;
+    name: string;
+    category: string | null;
+    data_type: 'numeric' | 'boolean' | 'text' | 'select';
+    unit: string | null;
+    spec_min: number | null;
+    spec_max: number | null;
+    warning_min: number | null;
+    warning_max: number | null;
+    select_options: string[] | null;
+    is_required: boolean;
+    sort_order: number;
+  };
+}
+
+export interface InspectionSession {
+  id: string;
+  tenant_id: string;
+  template_id: string;
+  inspector_id: string;
+  status: 'draft' | 'in_progress' | 'completed';
+  started_at: string | null;
+  completed_at: string | null;
+  notes: string | null;
+  template_name: string | null;
+  inspector_name: string | null;
+  items_count: number;
+  records_count: number;
+  records?: InspectionRecord[];
+  items_detail?: InspectionItemDetail[];
+  created_at: string | null;
+  updated_at: string | null;
+}
+
 export interface InspectionTemplate {
   id: string;
   tenant_id: string;