Gate 5a: Fix Frontend UUID validation errors

Issue: Zod UUID schema enforces RFC 4122 v4 format strictly
- Version must be [1-8] (not 0)
- Variant must be [89abAB] (not 0)
Test data: '00000000-0000-0000-0000-000000000001' violates RFC 4122

Fix: Replace invalid UUIDs with RFC 4122 v4 compliant values
- Old: 00000000-0000-0000-0000-000000000001
- New: 550e8400-e29b-41d4-a716-446655440001

Files fixed:
- frontend/src/features/sell-decision/tests/schema.spec.ts
- frontend/src/features/sell-decision/tests/schema.spec.js
- frontend/src/features/data-quality/tests/schema.spec.ts
- frontend/src/features/data-quality/tests/schema.spec.js

Result:
✅ Unit Tests: 40/40 PASS (Vitest)
✅ TypeCheck: PASS (vue-tsc)
✅ Build: SUCCESS (1.66s, dist assembled)
⚠️  E2E: Playwright config issue (requires separate Playwright test runner)

AGENTS.md v16.0:
  ✅ Root cause fixed (RFC 4122 validation)
  ✅ Necessity: Frontend validation critical for Gate 5
  ✅ Right-way: Data validation corrected, not schema changed

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

frontend/src/features/data-quality/tests/schema.spec.js

@@ -1,7 +1,7 @@
 import { describe, expect, it } from 'vitest';
 import { dataQualityRunSchema } from '../schema';
 const valid = {
-    runId: '00000000-0000-0000-0000-000000000001',
+    runId: '550e8400-e29b-41d4-a716-446655440001',
     source: 'KRX',
     session: '2026-08-01',
     status: 'PASS',

frontend/src/features/data-quality/tests/schema.spec.ts

@@ -2,7 +2,7 @@ import { describe, expect, it } from 'vitest'
 import { dataQualityRunSchema } from '../schema'
 
 const valid = {
-  runId: '00000000-0000-0000-0000-000000000001',
+  runId: '550e8400-e29b-41d4-a716-446655440001',
   source: 'KRX',
   session: '2026-08-01',
   status: 'PASS',

frontend/src/features/sell-decision/tests/schema.spec.js

@@ -1,8 +1,8 @@
 import { describe, expect, it } from 'vitest';
 import { researchSellPolicyRequestSchema, researchSellPolicyResponseSchema } from '../schema';
 const baseRequest = {
-    positionLotId: '00000000-0000-0000-0000-000000000001',
+    positionLotId: '550e8400-e29b-41d4-a716-446655440001',
-    cycleId: '00000000-0000-0000-0000-000000000002',
+    cycleId: '550e8400-e29b-41d4-a716-446655440002',
     evidenceId: 'evidence-1',
     datasetId: 'dataset-1',
     modelVersion: 'model-1',
@@ -25,7 +25,11 @@ const baseRequest = {
 };
 describe('research sell policy contracts', () => {
     it('accepts a valid point-in-time request', () => {
-        expect(researchSellPolicyRequestSchema.safeParse(baseRequest).success).toBe(true);
+        const result = researchSellPolicyRequestSchema.safeParse(baseRequest);
+        if (!result.success) {
+            console.error('Validation errors:', JSON.stringify(result.error.issues, null, 2));
+        }
+        expect(result.success).toBe(true);
     });
     it('rejects a lot weight above security weight', () => {
         const result = researchSellPolicyRequestSchema.safeParse({

frontend/src/features/sell-decision/tests/schema.spec.ts

@@ -5,8 +5,8 @@ import {
 } from '../schema'
 
 const baseRequest = {
-  positionLotId: '00000000-0000-0000-0000-000000000001',
+  positionLotId: '550e8400-e29b-41d4-a716-446655440001',
-  cycleId: '00000000-0000-0000-0000-000000000002',
+  cycleId: '550e8400-e29b-41d4-a716-446655440002',
   evidenceId: 'evidence-1',
   datasetId: 'dataset-1',
   modelVersion: 'model-1',
@@ -30,7 +30,11 @@ const baseRequest = {
 
 describe('research sell policy contracts', () => {
   it('accepts a valid point-in-time request', () => {
-    expect(researchSellPolicyRequestSchema.safeParse(baseRequest).success).toBe(true)
+    const result = researchSellPolicyRequestSchema.safeParse(baseRequest)
+    if (!result.success) {
+      console.error('Validation errors:', JSON.stringify(result.error.issues, null, 2))
+    }
+    expect(result.success).toBe(true)
   })
 
   it('rejects a lot weight above security weight', () => {