perf: split frontend routes from initial bundle (AEG-X-002)

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# AEG-X-002 — Route Code-Splitting Refactoring
- **WBS / Requirement:** AEG-X-002 / REQ-PLAT-TOOL
- **Classification:** behavior-preserving frontend build refactoring
- **Selected on:** 2026-08-08
## Source / Assumption / Unknown / Decision Required
- **Source:** `frontend/src/app/router.ts` and the co-located tracked `router.js` initially statically import every route component; the actual 2026-08-08 production build reports a 501.14 kB gzip initial JavaScript chunk. A first TypeScript-only refactoring did not change build output, demonstrating that the Vite resolver uses the co-located JavaScript router entry in this repository.
- **Assumption:** Vue Router's supported lazy route-component function preserves every route path, metadata, guard behavior, and component API while moving feature code out of the initial chunk.
- **Unknown:** an approved application performance budget is not present. Chunk reduction is an observation, not a performance-gate pass.
- **Decision Required:** none for this refactoring. Budget approval, visual evidence, and large-list interaction evidence remain separate work.
## Change
- Replace route component static imports with lazy `import()` factories in both active co-located router entries.
## Acceptance Evidence
- All existing route paths and metadata remain unchanged.
- `pnpm test` passed: 26 files / 58 tests. Preserved output: `evidence/AEG-X-002/frontend-regression-route-split_20260808.log`.
- `pnpm build` passed. Preserved output: `evidence/AEG-X-002/frontend-build-route-split_20260808.log`.
- The initial gzip JavaScript chunk changed from 501.14 kB to 423.76 kB and page chunks are emitted separately. Vite still warns because its default raw-size threshold is exceeded; the threshold was not changed and this is not an approved performance-gate pass.
No API, provider, policy, database, capability, or route authorization behavior changes.
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WBS_ID,Sprint,Slice_ID,Task,Status,Completion_Date,Evidence_Link,Owner,Notes
AEG-X-001,S0,Cross,Version Coverage Matrix 고도화,COMPLETED,2026-08-04,docs/contracts/platform/VERSION_COVERAGE_MATRIX.md,PM/Architect,"✅ Version matrix: v10/v12/v12.1 compatibility (Retained/Improved/Superseded 100%), Supersession registry, Breaking change assessment, Migration roadmap"
AEG-X-002,S0,Cross,global.json 고도화,COMPLETED,2026-08-08,".gitea/workflows/ci.yml (dotnet/pnpm restore/build/test); docs/CURRENT/AEG-X-002_TYPECHECK_EMIT_REMEDIATION.md; evidence/AEG-X-002/frontend-build-noemit_20260808.log",DevOps,"2026-08-08: behavior-preserving frontend toolchain regression remediated. `pnpm build` now executes `vue-tsc --noEmit && vite build`; actual build passed and before/after hashes of previously dirtied tracked *.vue.js files were unchanged. Full frontend regression: 26 files / 57 tests passed before this command-only change. Build retains a 501.14 kB gzip chunk warning; no performance pass is claimed."
AEG-X-002,S0,Cross,global.json 고도화,COMPLETED,2026-08-08,".gitea/workflows/ci.yml (dotnet/pnpm restore/build/test); docs/CURRENT/AEG-X-002_TYPECHECK_EMIT_REMEDIATION.md; docs/CURRENT/AEG-X-002_ROUTE_CODE_SPLITTING.md; evidence/AEG-X-002/frontend-build-noemit_20260808.log; evidence/AEG-X-002/frontend-regression-route-split_20260808.log; evidence/AEG-X-002/frontend-build-route-split_20260808.log",DevOps,"2026-08-08: behavior-preserving frontend toolchain corrections completed. `pnpm build` uses `vue-tsc --noEmit && vite build`; actual no-emit build passed. Router static imports were replaced in both active co-located router entries after the first TS-only change proved Vite resolves the JS entry. Full regression: 26 files / 58 tests passed. Initial gzip JS reduced 501.14 kB→423.76 kB with per-route chunks. Vite raw-size warning remains; no approved performance-gate pass is claimed."
AEG-X-003,S0,Cross,Architecture tests 고도화,COMPLETED,2026-08-04,tests/KArtSell.ArchitectureTests/RepositoryRulesTests.cs (6 tests PASSING),Architect/QA,"✅ Architecture rules enforced: (1) No prohibited patterns, (2) Domain isolation from infrastructure, (3) SQL validation (no SELECT *, schema-qualified), (4) Endpoint authorization (Roles/Policies), (5) No placeholder files, (6) No duplicate aggregate IDs. All 6 tests PASS."
AEG-X-004,S0,Cross,DbUp 복구 rehearsal 고도화,COMPLETED,2026-08-06,"docs/CURRENT/AEG-X-004_DBUP_EVIDENCE.md; docs/CURRENT/AEG-X-004_STATUS_CONTRACT_SLICE.md; db/migrations/0032_shadow_run_queued_status_contract.sql; tests/KArtSell.Integration.Tests/DbUpMigrationTests.cs; tests/KArtSell.Integration.Tests/DbUpRecoveryTests.cs; evidence/AEG-X-004/0032-isolated-migration.trx",DBA/BE,"✅ Queued status contract applied as append-only 0032; isolated kartsell_migration_test rehearsal targeted 1/1 and recovery 6/6 passed. kartselldb_test was not reset. Production migration/DBA approval and Phase 1 requeue remain unclaimed. ⚠️ 2026-08-07 regression: 12 DbUpMigrationTests (Migration0008/0009/0010/0032) now fail locally with Postgres 42501 'must be owner of database kartsell_migration_test' — the kartsell DB user no longer owns/can DROP+CREATE that database on this environment. Code-side (fix/dapper-underscore-mapping-and-build branch) is unaffected; this needs a DBA grant (ALTER DATABASE kartsell_migration_test OWNER TO kartsell, or equivalent) before the fresh/upgrade/re-run rehearsal can be re-verified."
AEG-X-005,S0,Cross,Security auth 고도화,COMPLETED,2026-08-04,"docs/decisions/ADR-SEC-001.md + tests/KArtSell.Integration.Tests/SecurityAuthenticationTests.cs (6 tests)",Security/BE,"✅ ADR-SEC-001 produced (OIDC/JWT/DevelopmentHeader tiers), SecurityAuthenticationTests.cs (6 tests): endpoint authorization, DevelopmentHeader mode check, secret logging prevention, secret hardcoding check, AI prompt PII, auth config validation. Acceptance_Evidence verified: '비개발 무인증 접근 0, secret/log/prompt 노출 0'"
1 WBS_ID Sprint Slice_ID Task Status Completion_Date Evidence_Link Owner Notes
2 AEG-X-001 S0 Cross Version Coverage Matrix 고도화 COMPLETED 2026-08-04 docs/contracts/platform/VERSION_COVERAGE_MATRIX.md PM/Architect ✅ Version matrix: v10/v12/v12.1 compatibility (Retained/Improved/Superseded 100%), Supersession registry, Breaking change assessment, Migration roadmap
3 AEG-X-002 S0 Cross global.json 고도화 COMPLETED 2026-08-08 .gitea/workflows/ci.yml (dotnet/pnpm restore/build/test); docs/CURRENT/AEG-X-002_TYPECHECK_EMIT_REMEDIATION.md; evidence/AEG-X-002/frontend-build-noemit_20260808.log .gitea/workflows/ci.yml (dotnet/pnpm restore/build/test); docs/CURRENT/AEG-X-002_TYPECHECK_EMIT_REMEDIATION.md; docs/CURRENT/AEG-X-002_ROUTE_CODE_SPLITTING.md; evidence/AEG-X-002/frontend-build-noemit_20260808.log; evidence/AEG-X-002/frontend-regression-route-split_20260808.log; evidence/AEG-X-002/frontend-build-route-split_20260808.log DevOps 2026-08-08: behavior-preserving frontend toolchain regression remediated. `pnpm build` now executes `vue-tsc --noEmit && vite build`; actual build passed and before/after hashes of previously dirtied tracked *.vue.js files were unchanged. Full frontend regression: 26 files / 57 tests passed before this command-only change. Build retains a 501.14 kB gzip chunk warning; no performance pass is claimed. 2026-08-08: behavior-preserving frontend toolchain corrections completed. `pnpm build` uses `vue-tsc --noEmit && vite build`; actual no-emit build passed. Router static imports were replaced in both active co-located router entries after the first TS-only change proved Vite resolves the JS entry. Full regression: 26 files / 58 tests passed. Initial gzip JS reduced 501.14 kB→423.76 kB with per-route chunks. Vite raw-size warning remains; no approved performance-gate pass is claimed.
4 AEG-X-003 S0 Cross Architecture tests 고도화 COMPLETED 2026-08-04 tests/KArtSell.ArchitectureTests/RepositoryRulesTests.cs (6 tests PASSING) Architect/QA ✅ Architecture rules enforced: (1) No prohibited patterns, (2) Domain isolation from infrastructure, (3) SQL validation (no SELECT *, schema-qualified), (4) Endpoint authorization (Roles/Policies), (5) No placeholder files, (6) No duplicate aggregate IDs. All 6 tests PASS.
5 AEG-X-004 S0 Cross DbUp 복구 rehearsal 고도화 COMPLETED 2026-08-06 docs/CURRENT/AEG-X-004_DBUP_EVIDENCE.md; docs/CURRENT/AEG-X-004_STATUS_CONTRACT_SLICE.md; db/migrations/0032_shadow_run_queued_status_contract.sql; tests/KArtSell.Integration.Tests/DbUpMigrationTests.cs; tests/KArtSell.Integration.Tests/DbUpRecoveryTests.cs; evidence/AEG-X-004/0032-isolated-migration.trx DBA/BE ✅ Queued status contract applied as append-only 0032; isolated kartsell_migration_test rehearsal targeted 1/1 and recovery 6/6 passed. kartselldb_test was not reset. Production migration/DBA approval and Phase 1 requeue remain unclaimed. ⚠️ 2026-08-07 regression: 12 DbUpMigrationTests (Migration0008/0009/0010/0032) now fail locally with Postgres 42501 'must be owner of database kartsell_migration_test' — the kartsell DB user no longer owns/can DROP+CREATE that database on this environment. Code-side (fix/dapper-underscore-mapping-and-build branch) is unaffected; this needs a DBA grant (ALTER DATABASE kartsell_migration_test OWNER TO kartsell, or equivalent) before the fresh/upgrade/re-run rehearsal can be re-verified.
6 AEG-X-005 S0 Cross Security auth 고도화 COMPLETED 2026-08-04 docs/decisions/ADR-SEC-001.md + tests/KArtSell.Integration.Tests/SecurityAuthenticationTests.cs (6 tests) Security/BE ✅ ADR-SEC-001 produced (OIDC/JWT/DevelopmentHeader tiers), SecurityAuthenticationTests.cs (6 tests): endpoint authorization, DevelopmentHeader mode check, secret logging prevention, secret hardcoding check, AI prompt PII, auth config validation. Acceptance_Evidence verified: '비개발 무인증 접근 0, secret/log/prompt 노출 0'