新增市場情報 migration 套用演練

config.py

@@ -320,7 +320,7 @@ YOUTUBE_API_KEY = os.getenv('YOUTUBE_API_KEY', '')
 # ==========================================
 # 系統版本與路徑
 # ==========================================
-SYSTEM_VERSION = "V10.203"
+SYSTEM_VERSION = "V10.204"
 LOG_FILE_PATH = os.path.join(BASE_DIR, 'logs/system.log')
 public_url = PUBLIC_URL  # 用於模板顯示
 

docs/adr/ADR-035-cross-platform-market-campaign-intelligence.md

@@ -168,6 +168,7 @@ EwoooC 目前已有 MOMO EDM / 節慶活動資料、`promo_products`、PChome
 - 2026-05-18 追加 deployment readiness modularization：將 `/api/market_intel/deployment_readiness` 的大型 app-only release gate 組裝邏輯由 `services.market_intel.service` 拆至 `services.market_intel.deployment_readiness`，主服務保留薄入口，避免後續 crawler / MCP / 審核功能推進時超過 800 行治理線；行為仍維持 preview-only，不執行 git、部署、SSH、migration 或 DB write。
 - 2026-05-18 追加 alert review queue contract：`/api/market_intel/opportunity_alert_plan` 補上 `market_alert_review_queue` 的 preview contract、required / audit / forbidden fields、priority lanes 與索引規劃。此階段只定義資料契約，不建立 review table、不寫 queue contract、不執行審核、不派送 Telegram、不呼叫 LLM。
 - 2026-05-18 追加 alert review queue migration blueprint：`market_alert_review_queue` 納入 `database/market_intel_models.py`、`migrations/032_market_intel_core_schema.sql` 與 migration blueprint，補齊 additive CREATE TABLE / index / grant / rollback draft。此階段仍不執行 migration、不連 DB、不建立 review queue、不寫入審核資料。
+- 2026-05-18 追加 migration apply drill preview：`services.market_intel.migration_drill` 與 `/api/market_intel/migration_apply_drill` 集中正式 migration 前的只讀 schema probe、platform seed diff、人工套用清單、post-apply smoke、回滾演練與風險清單。預設 `execute=false` 不連 DB；人工 smoke 可用 `execute=true` 觸發只讀 catalog / seed diff probe，但仍不執行 psql、不跑 rollback、不寫 DB、不重啟容器、不掛 scheduler。
 
 ### Phase 4：Coupang / Shopee Adapter
 

routes/README.md

@@ -19,7 +19,7 @@
 | `edm_routes.py` | EDM 與節慶儀表板 | `/edm`, `/festival` |
 | `monthly_routes.py` | 月結分析 | `/monthly_summary_analysis`, `/api/monthly_summary_data` |
 | `daily_sales_routes.py` | 當日業績 | `/daily_sales`, `/daily_sales/export*` |
-| `market_intel_routes.py` | 市場情報 Phase 42 alert review queue migration blueprint | `/market_intel`, `/market_intel/*`, `/api/market_intel/status`, `/api/market_intel/schema`, `/api/market_intel/schema_smoke`, `/api/market_intel/schema_db_probe`, `/api/market_intel/platform_seed_db_diff`, `/api/market_intel/legacy_source_bridge`, `/api/market_intel/mcp_readiness`, `/api/market_intel/mcp_tool_contract`, `/api/market_intel/mcp_deploy_preflight`, `/api/market_intel/mcp_activation_runbook`, `/api/market_intel/mcp_fetch_gate`, `/api/market_intel/scheduler_plan`, `/api/market_intel/match_review_plan`, `/api/market_intel/opportunity_plan`, `/api/market_intel/opportunity_scoring_plan`, `/api/market_intel/opportunity_evidence_plan`, `/api/market_intel/opportunity_alert_plan`, `/api/market_intel/adapters`, `/api/market_intel/dry_run_plan`, `/api/market_intel/discovery_plan`, `/api/market_intel/manual_discovery`, `/api/market_intel/candidate_preview`, `/api/market_intel/platform_seed_plan`, `/api/market_intel/platform_seed_write_guard`, `/api/market_intel/platform_seed_writer_plan`, `/api/market_intel/migration_blueprint`, `/api/market_intel/seed_writer_cli_status`, `/api/market_intel/write_approval_runbook`, `/api/market_intel/deployment_readiness` |
+| `market_intel_routes.py` | 市場情報 Phase 43 migration apply drill preview | `/market_intel`, `/market_intel/*`, `/api/market_intel/status`, `/api/market_intel/schema`, `/api/market_intel/schema_smoke`, `/api/market_intel/schema_db_probe`, `/api/market_intel/platform_seed_db_diff`, `/api/market_intel/legacy_source_bridge`, `/api/market_intel/mcp_readiness`, `/api/market_intel/mcp_tool_contract`, `/api/market_intel/mcp_deploy_preflight`, `/api/market_intel/mcp_activation_runbook`, `/api/market_intel/mcp_fetch_gate`, `/api/market_intel/scheduler_plan`, `/api/market_intel/match_review_plan`, `/api/market_intel/opportunity_plan`, `/api/market_intel/opportunity_scoring_plan`, `/api/market_intel/opportunity_evidence_plan`, `/api/market_intel/opportunity_alert_plan`, `/api/market_intel/adapters`, `/api/market_intel/dry_run_plan`, `/api/market_intel/discovery_plan`, `/api/market_intel/manual_discovery`, `/api/market_intel/candidate_preview`, `/api/market_intel/platform_seed_plan`, `/api/market_intel/platform_seed_write_guard`, `/api/market_intel/platform_seed_writer_plan`, `/api/market_intel/migration_blueprint`, `/api/market_intel/migration_apply_drill`, `/api/market_intel/seed_writer_cli_status`, `/api/market_intel/write_approval_runbook`, `/api/market_intel/deployment_readiness` |
 | `api_routes.py` | 通用任務與查詢 API | `/api/run_task`, `/api/history/*` |
 | `export_routes.py` | 匯出功能 | `/api/export/*` |
 | `import_routes.py` | 匯入功能 | `/api/import_excel`, `/api/import/monthly_summary` |

routes/market_intel_routes.py

@@ -260,6 +260,17 @@ def market_intel_migration_blueprint():
     return jsonify(_service().build_migration_blueprint())
 
 
+@market_intel_bp.route("/api/market_intel/migration_apply_drill")
+@login_required
+def market_intel_migration_apply_drill():
+    execute_requested = request.args.get("execute", "false").lower() == "true"
+    return jsonify(
+        _service().build_migration_apply_drill(
+            execute_requested=execute_requested,
+        )
+    )
+
+
 @market_intel_bp.route("/api/market_intel/seed_writer_cli_status")
 @login_required
 def market_intel_seed_writer_cli_status():

services/market_intel/deployment_readiness.py

@@ -23,6 +23,7 @@ def build_deployment_readiness_preview(
     opportunity_scoring_plan = service.build_opportunity_scoring_plan()
     opportunity_evidence_plan = service.build_opportunity_evidence_plan()
     opportunity_alert_plan = service.build_opportunity_alert_plan()
+    migration_apply_drill = service.build_migration_apply_drill()
     checks = {
         "schema_smoke_passed": bool(schema_smoke["passed"]),
         "feature_flags_default_safe": bool(
@@ -110,6 +111,15 @@ def build_deployment_readiness_preview(
             and not opportunity_alert_plan["database_write_executed"]
             and not opportunity_alert_plan["llm_call_executed"]
         ),
+        "migration_apply_drill_preview_safe": bool(
+            migration_apply_drill["mode"] == "migration_apply_drill_preview"
+            and not migration_apply_drill["migration_executed"]
+            and not migration_apply_drill["rollback_executed"]
+            and not migration_apply_drill["database_write_executed"]
+            and not migration_apply_drill["database_commit_executed"]
+            and not migration_apply_drill["api_executes_migration"]
+            and not migration_apply_drill["api_executes_rollback"]
+        ),
     }
     ready_for_production_deploy = all(checks.values())
     blocked_reasons = [
@@ -244,6 +254,7 @@ def build_deployment_readiness_preview(
             "/api/market_intel/opportunity_scoring_plan",
             "/api/market_intel/opportunity_evidence_plan",
             "/api/market_intel/opportunity_alert_plan",
+            "/api/market_intel/migration_apply_drill",
         ],
         "status": status.to_dict(),
         "schema_smoke": schema_smoke,
@@ -254,6 +265,7 @@ def build_deployment_readiness_preview(
         },
         "write_approval_runbook": service.build_write_approval_runbook(),
         "migration_blueprint": service.build_migration_blueprint(),
+        "migration_apply_drill": migration_apply_drill,
         "seed_writer_cli_status": service.build_seed_writer_cli_status(),
         "schema_db_probe": service.build_schema_db_probe(),
         "platform_seed_db_diff": service.build_platform_seed_db_diff(),

services/market_intel/migration_drill.py

@@ -0,0 +1,295 @@
+"""市場情報 migration 套用前演練。
+
+本模組只組裝正式 migration 前的檢查、人工步驟與回滾演練，不執行 SQL、
+不建立 ORM session、不寫入資料庫。
+"""
+
+
+def _schema_state(schema_db_probe):
+    mode = schema_db_probe.get("mode")
+    if mode == "schema_db_probe_planned":
+        return "planned_no_db_probe"
+    if mode == "schema_db_probe_error":
+        return "probe_error"
+    if not schema_db_probe.get("read_only_query_executed"):
+        return "planned_no_db_probe"
+    if schema_db_probe.get("schema_tables_exist"):
+        return "already_applied"
+    existing_tables = schema_db_probe.get("existing_tables") or []
+    if existing_tables:
+        return "partial_schema"
+    return "not_applied"
+
+
+def _check_item(key, label, passed, status_when_blocked="blocked"):
+    return {
+        "key": key,
+        "label": label,
+        "passed": bool(passed),
+        "status": "pass" if passed else status_when_blocked,
+    }
+
+
+def _manual_step(key, label, status="required"):
+    return {
+        "key": key,
+        "label": label,
+        "status": status,
+    }
+
+
+def _build_blocked_reasons(*, checks, schema_state, execute_requested):
+    blocked_reasons = [
+        "migration_not_executed_by_drill",
+        "api_never_runs_migration",
+        "backup_not_verified",
+        "operator_approval_missing",
+        "production_maintenance_window_required",
+    ]
+    blocked_reasons.extend(
+        key for key, passed in checks.items()
+        if not passed
+    )
+    if not execute_requested:
+        blocked_reasons.append("read_only_db_probe_not_executed")
+    if schema_state == "probe_error":
+        blocked_reasons.append("schema_probe_error_requires_manual_review")
+    if schema_state == "partial_schema":
+        blocked_reasons.append("partial_market_schema_requires_manual_review")
+    if schema_state == "already_applied":
+        blocked_reasons.append("market_schema_already_present_apply_not_required")
+    return blocked_reasons
+
+
+def build_migration_apply_drill_preview(
+    *,
+    runtime_status,
+    migration_blueprint,
+    schema_db_probe,
+    platform_seed_db_diff,
+):
+    """建立 migration apply drill payload；不執行 migration 或 DB write。"""
+    execute_requested = bool(
+        schema_db_probe.get("execute_requested")
+        or platform_seed_db_diff.get("execute_requested")
+    )
+    schema_state = _schema_state(schema_db_probe)
+    checks = {
+        "migration_file_matches_blueprint": bool(
+            migration_blueprint.get("file_created")
+            and migration_blueprint.get("file_matches_blueprint")
+        ),
+        "forward_sql_additive_only": bool(
+            migration_blueprint.get("safety_checks", {}).get("forward_sql_additive_only")
+            and not migration_blueprint.get("forward_has_destructive_sql")
+        ),
+        "schema_probe_read_only_or_planned": bool(
+            not schema_db_probe.get("database_write_executed")
+            and not schema_db_probe.get("database_commit_executed")
+            and not schema_db_probe.get("migration_executed")
+            and not schema_db_probe.get("database_session_created")
+        ),
+        "seed_diff_read_only_or_planned": bool(
+            not platform_seed_db_diff.get("database_write_executed")
+            and not platform_seed_db_diff.get("database_commit_executed")
+            and not platform_seed_db_diff.get("migration_executed")
+            and not platform_seed_db_diff.get("database_session_created")
+            and not platform_seed_db_diff.get("seed_write_executed")
+        ),
+        "feature_flags_default_safe": bool(
+            not runtime_status.enabled
+            and not runtime_status.crawler_enabled
+            and not runtime_status.write_enabled
+        ),
+        "database_write_blocked": bool(not runtime_status.database_write_allowed),
+        "scheduler_detached": bool(not runtime_status.scheduler_attached),
+        "external_fetch_blocked": bool(not runtime_status.crawler_enabled),
+        "rollback_manual_only": bool(
+            migration_blueprint.get("rollback_requires_manual_approval")
+        ),
+    }
+    drill_ready_for_operator_review = all(checks.values())
+    ready_for_manual_apply_review = bool(
+        drill_ready_for_operator_review
+        and execute_requested
+        and schema_state in {"not_applied", "partial_schema"}
+    )
+    ready_to_apply_migration = False
+
+    pre_apply_checklist = [
+        _manual_step(
+            "confirm_worktree_and_release_scope",
+            "確認本次只包含 market_intel migration / drill 相關變更",
+        ),
+        _manual_step(
+            "run_backup_system",
+            "套正式 migration 前先完成 python backup_system.py 並確認備份可用",
+        ),
+        _manual_step(
+            "run_schema_probe_execute_true",
+            "人工呼叫 /api/market_intel/schema_db_probe?execute=true 做只讀 catalog 檢查",
+        ),
+        _manual_step(
+            "run_seed_diff_execute_true",
+            "人工呼叫 /api/market_intel/platform_seed_db_diff?execute=true 做只讀 seed diff",
+        ),
+        _manual_step(
+            "review_forward_sql",
+            "確認 forward SQL 只有 CREATE TABLE / CREATE INDEX / GRANT 類 additive 操作",
+        ),
+        _manual_step(
+            "open_maintenance_window",
+            "確認正式 DB migration 維護窗口與操作員身分",
+        ),
+        _manual_step(
+            "apply_psql_manually",
+            "由操作員手動執行 migration command；API 不執行 psql",
+        ),
+        _manual_step(
+            "post_apply_smoke",
+            "套用後驗證 /health、schema_db_probe?execute=true、deployment_readiness",
+        ),
+    ]
+    post_apply_verification = [
+        _manual_step("health_endpoint", "驗證 /health healthy 且版本正確"),
+        _manual_step(
+            "schema_probe_all_tables",
+            "確認 schema_db_probe?execute=true 顯示所有 market_* 表存在",
+        ),
+        _manual_step(
+            "seed_writer_cli_status",
+            "確認 seed writer CLI status 仍未自動寫入，等待下一次獨立批准",
+        ),
+        _manual_step(
+            "flags_still_off",
+            "確認 MARKET_INTEL_* flags 仍全關，crawler 與 scheduler 未啟用",
+        ),
+    ]
+    rollback_drill = {
+        "mode": "rollback_drill_preview",
+        "rollback_sql_available": bool(migration_blueprint.get("rollback_sql")),
+        "rollback_executed": False,
+        "database_write_executed": False,
+        "database_commit_executed": False,
+        "requires_manual_approval": True,
+        "requires_backup_before_rollback": True,
+        "requires_data_loss_review": True,
+        "rollback_table_order": list(reversed(migration_blueprint.get("expected_tables") or [])),
+        "manual_command_shape": (
+            "將已審核 rollback SQL 寫入臨時檔後，手動執行 "
+            "psql \"$DATABASE_URL\" -v ON_ERROR_STOP=1 -f <reviewed_rollback.sql>"
+        ),
+        "fallback_first": [
+            "先關閉 MARKET_INTEL_* feature flags",
+            "確認 scheduler 未掛載市場情報 job",
+            "app-only 回退上一版並只 recreate momo-app",
+            "只有在確認 market_* 無需保留資料時才評估 rollback SQL",
+        ],
+    }
+    risk_register = [
+        {
+            "key": "partial_schema",
+            "label": "若只建立部分 market_* 表，必須人工比對 migration 檔與 catalog，再決定重跑或補修。",
+            "severity": "medium",
+        },
+        {
+            "key": "grant_or_sequence_missing",
+            "label": "表存在不代表 GRANT / sequence 權限完整；post-apply smoke 需檢查 seed writer 仍可用。",
+            "severity": "medium",
+        },
+        {
+            "key": "rollback_drops_market_data",
+            "label": "rollback SQL 會 drop market_* 表，未來有正式資料後不可當一般回退手段。",
+            "severity": "high",
+        },
+        {
+            "key": "api_boundary",
+            "label": "API 只呈現 drill，不得替操作員執行 psql、docker、SSH 或 DB write。",
+            "severity": "high",
+        },
+    ]
+
+    return {
+        "mode": "migration_apply_drill_preview",
+        "execute_requested": execute_requested,
+        "schema_state": schema_state,
+        "drill_ready_for_operator_review": drill_ready_for_operator_review,
+        "ready_for_manual_apply_review": ready_for_manual_apply_review,
+        "ready_to_apply_migration": ready_to_apply_migration,
+        "migration_executed": False,
+        "rollback_executed": False,
+        "database_connection_opened": bool(
+            schema_db_probe.get("database_connection_opened")
+            or platform_seed_db_diff.get("database_connection_opened")
+        ),
+        "read_only_query_executed": bool(
+            schema_db_probe.get("read_only_query_executed")
+            or platform_seed_db_diff.get("read_only_query_executed")
+        ),
+        "database_session_created": False,
+        "explicit_transaction_opened": False,
+        "database_write_executed": False,
+        "database_commit_executed": False,
+        "external_network_executed": False,
+        "scheduler_attached": False,
+        "api_executes_migration": False,
+        "api_executes_rollback": False,
+        "api_executes_docker": False,
+        "api_executes_ssh": False,
+        "checks": checks,
+        "check_items": [
+            _check_item(key, key, passed)
+            for key, passed in checks.items()
+        ],
+        "blocked_reasons": _build_blocked_reasons(
+            checks=checks,
+            schema_state=schema_state,
+            execute_requested=execute_requested,
+        ),
+        "pre_apply_checklist": pre_apply_checklist,
+        "post_apply_verification": post_apply_verification,
+        "rollback_drill": rollback_drill,
+        "risk_register": risk_register,
+        "manual_commands": {
+            "schema_probe": "/api/market_intel/schema_db_probe?execute=true",
+            "platform_seed_db_diff": "/api/market_intel/platform_seed_db_diff?execute=true",
+            "migration_apply": migration_blueprint.get("command_plan", {})
+            .get("migration_apply_command", {})
+            .get("command", ""),
+        },
+        "migration_blueprint_summary": {
+            "suggested_filename": migration_blueprint.get("suggested_filename"),
+            "file_created": bool(migration_blueprint.get("file_created")),
+            "file_matches_blueprint": bool(
+                migration_blueprint.get("file_matches_blueprint")
+            ),
+            "table_count": migration_blueprint.get("table_count", 0),
+            "forward_statement_count": migration_blueprint.get(
+                "forward_statement_count",
+                0,
+            ),
+            "rollback_statement_count": migration_blueprint.get(
+                "rollback_statement_count",
+                0,
+            ),
+        },
+        "schema_db_probe_summary": {
+            "mode": schema_db_probe.get("mode"),
+            "read_only_query_executed": bool(
+                schema_db_probe.get("read_only_query_executed")
+            ),
+            "schema_tables_exist": bool(schema_db_probe.get("schema_tables_exist")),
+            "missing_tables": schema_db_probe.get("missing_tables") or [],
+            "existing_tables": schema_db_probe.get("existing_tables") or [],
+        },
+        "platform_seed_db_diff_summary": {
+            "mode": platform_seed_db_diff.get("mode"),
+            "read_only_query_executed": bool(
+                platform_seed_db_diff.get("read_only_query_executed")
+            ),
+            "seed_rows_ready": bool(platform_seed_db_diff.get("seed_rows_ready")),
+            "missing_codes": platform_seed_db_diff.get("missing_codes") or [],
+            "changed_codes": platform_seed_db_diff.get("changed_codes") or [],
+            "matching_codes": platform_seed_db_diff.get("matching_codes") or [],
+        },
+    }

services/market_intel/service.py

@@ -30,6 +30,7 @@ from services.market_intel.mcp_deploy_preflight import build_mcp_deploy_prefligh
 from services.market_intel.mcp_fetch_gate import build_mcp_fetch_gate_preview
 from services.market_intel.mcp_readiness import build_mcp_readiness_plan
 from services.market_intel.migration_blueprint import build_migration_blueprint
+from services.market_intel.migration_drill import build_migration_apply_drill_preview
 from services.market_intel.opportunity_alerts import (
     build_opportunity_alert_plan_preview,
 )
@@ -84,7 +85,7 @@ class MarketIntelRuntimeStatus:
 class MarketIntelService:
     """市場情報入口服務，先集中 feature gate 與安全狀態。"""
 
-    phase = "phase_42_alert_review_queue_migration_blueprint"
+    phase = "phase_43_migration_apply_drill_preview"
 
     def get_runtime_status(self) -> MarketIntelRuntimeStatus:
         return MarketIntelRuntimeStatus(
@@ -288,21 +289,42 @@ class MarketIntelService:
             "expected_tables": self.get_schema_tables(),
         }
 
-    def build_schema_db_probe(self, *, execute_requested=False):
+    def build_schema_db_probe(
+        self,
+        *,
+        execute_requested=False,
+        engine=None,
+        database_url=None,
+        database_type=None,
+    ):
         """回報正式 DB schema 只讀探針；預設不連 DB。"""
         probe = build_schema_db_probe_plan(
             MARKET_INTEL_TABLES,
             execute_requested=execute_requested,
+            engine=engine,
+            database_url=database_url,
+            database_type=database_type,
         )
         probe["phase"] = self.phase
         return probe
 
-    def build_platform_seed_db_diff(self, platform_code="all", *, execute_requested=False):
+    def build_platform_seed_db_diff(
+        self,
+        platform_code="all",
+        *,
+        execute_requested=False,
+        engine=None,
+        database_url=None,
+        database_type=None,
+    ):
         """回報 platform seed 與 DB 的只讀差異；預設不連 DB。"""
         seed_plan = self.build_platform_seed_plan(platform_code=platform_code)
         diff = build_platform_seed_db_diff_plan(
             seed_plan,
             execute_requested=execute_requested,
+            engine=engine,
+            database_url=database_url,
+            database_type=database_type,
         )
         diff["phase"] = self.phase
         diff["platform_code"] = platform_code or "all"
@@ -495,6 +517,37 @@ class MarketIntelService:
         blueprint["phase"] = self.phase
         return blueprint
 
+    def build_migration_apply_drill(
+        self,
+        *,
+        execute_requested=False,
+        schema_engine=None,
+        seed_diff_engine=None,
+        database_url=None,
+        database_type=None,
+    ):
+        """建立正式 migration 前的只讀演練；不執行 migration 或 rollback。"""
+        schema_db_probe = self.build_schema_db_probe(
+            execute_requested=execute_requested,
+            engine=schema_engine,
+            database_url=database_url,
+            database_type=database_type,
+        )
+        platform_seed_db_diff = self.build_platform_seed_db_diff(
+            execute_requested=execute_requested,
+            engine=seed_diff_engine,
+            database_url=database_url,
+            database_type=database_type,
+        )
+        drill = build_migration_apply_drill_preview(
+            runtime_status=self.get_runtime_status(),
+            migration_blueprint=self.build_migration_blueprint(),
+            schema_db_probe=schema_db_probe,
+            platform_seed_db_diff=platform_seed_db_diff,
+        )
+        drill["phase"] = self.phase
+        return drill
+
     def build_seed_writer_cli_status(
         self,
         platform_code="all",

templates/market_intel/disabled.html

@@ -612,6 +612,24 @@
         </div>
     </div>
 
+    <div class="market-intel-panel" data-market-intel-migration-drill>
+        <div class="market-intel-preview-head">
+            <div>
+                <p class="market-intel-muted momo-mono mb-1">MIGRATION / APPLY DRILL</p>
+                <h2 class="market-intel-preview-title">Migration 套用演練</h2>
+            </div>
+            <button class="market-intel-icon-button" type="button" title="重新整理 migration 套用演練" data-market-intel-migration-drill-refresh>
+                <i class="fas fa-rotate-right" aria-hidden="true"></i>
+            </button>
+        </div>
+        <div class="market-intel-preview-meta" data-market-intel-migration-drill-meta>
+            <span class="market-intel-pill">loading</span>
+        </div>
+        <div data-market-intel-migration-drill-body>
+            <div class="market-intel-empty">讀取 migration 套用演練中...</div>
+        </div>
+    </div>
+
     <div class="market-intel-panel" data-market-intel-approval>
         <div class="market-intel-preview-head">
             <div>
@@ -670,9 +688,10 @@
         const opportunityEvidenceRoot = document.querySelector('[data-market-intel-opportunity-evidence]');
         const opportunityAlertRoot = document.querySelector('[data-market-intel-opportunity-alert]');
         const migrationRoot = document.querySelector('[data-market-intel-migration]');
+        const migrationDrillRoot = document.querySelector('[data-market-intel-migration-drill]');
         const approvalRoot = document.querySelector('[data-market-intel-approval]');
         const deployRoot = document.querySelector('[data-market-intel-deploy]');
-        if (!root && !writerRoot && !cliRoot && !dbProbeRoot && !seedDiffRoot && !legacyBridgeRoot && !mcpReadinessRoot && !mcpPreflightRoot && !mcpActivationRoot && !mcpFetchGateRoot && !schedulerRoot && !matchReviewRoot && !opportunityRoot && !opportunityScoringRoot && !opportunityEvidenceRoot && !opportunityAlertRoot && !migrationRoot && !approvalRoot && !deployRoot) return;
+        if (!root && !writerRoot && !cliRoot && !dbProbeRoot && !seedDiffRoot && !legacyBridgeRoot && !mcpReadinessRoot && !mcpPreflightRoot && !mcpActivationRoot && !mcpFetchGateRoot && !schedulerRoot && !matchReviewRoot && !opportunityRoot && !opportunityScoringRoot && !opportunityEvidenceRoot && !opportunityAlertRoot && !migrationRoot && !migrationDrillRoot && !approvalRoot && !deployRoot) return;
 
         const meta = root ? root.querySelector('[data-market-intel-preview-meta]') : null;
         const body = root ? root.querySelector('[data-market-intel-preview-body]') : null;
@@ -742,6 +761,10 @@
         const migrationBody = migrationRoot ? migrationRoot.querySelector('[data-market-intel-migration-body]') : null;
         const migrationRefresh = migrationRoot ? migrationRoot.querySelector('[data-market-intel-migration-refresh]') : null;
         const migrationEndpoint = "{{ url_for('market_intel.market_intel_migration_blueprint') }}";
+        const migrationDrillMeta = migrationDrillRoot ? migrationDrillRoot.querySelector('[data-market-intel-migration-drill-meta]') : null;
+        const migrationDrillBody = migrationDrillRoot ? migrationDrillRoot.querySelector('[data-market-intel-migration-drill-body]') : null;
+        const migrationDrillRefresh = migrationDrillRoot ? migrationDrillRoot.querySelector('[data-market-intel-migration-drill-refresh]') : null;
+        const migrationDrillEndpoint = "{{ url_for('market_intel.market_intel_migration_apply_drill') }}?execute=false";
         const approvalMeta = approvalRoot ? approvalRoot.querySelector('[data-market-intel-approval-meta]') : null;
         const approvalBody = approvalRoot ? approvalRoot.querySelector('[data-market-intel-approval-body]') : null;
         const approvalRefresh = approvalRoot ? approvalRoot.querySelector('[data-market-intel-approval-refresh]') : null;
@@ -2290,6 +2313,126 @@
             }
         };
 
+        const renderMigrationDrillMeta = data => {
+            migrationDrillMeta.innerHTML = [
+                `mode=${data.mode || 'unknown'}`,
+                `schema=${data.schema_state || 'unknown'}`,
+                `probe=${data.read_only_query_executed ? 'read-only' : 'planned'}`,
+                `review=${data.drill_ready_for_operator_review ? 'ready' : 'blocked'}`,
+                `apply=${data.ready_to_apply_migration ? 'yes' : 'manual'}`
+            ].map(item => `<span class="market-intel-pill">${escapeHtml(item)}</span>`).join('');
+        };
+
+        const renderMigrationDrillBody = data => {
+            const blockers = (data.blocked_reasons || []).join(' / ');
+            const checks = Object.entries(data.checks || {});
+            const preApply = data.pre_apply_checklist || [];
+            const postApply = data.post_apply_verification || [];
+            const rollback = data.rollback_drill || {};
+            const risks = data.risk_register || [];
+            const commands = data.manual_commands || {};
+            const schema = data.schema_db_probe_summary || {};
+            const seedDiff = data.platform_seed_db_diff_summary || {};
+            const renderStep = item => `
+                <div class="market-intel-check">
+                    <div>
+                        <strong>${escapeHtml(item.key || item.label || 'step')}</strong>
+                        <small>${escapeHtml(item.label || item.key || '')}</small>
+                    </div>
+                    <span>${escapeHtml(item.status || 'required').toUpperCase()}</span>
+                </div>
+            `;
+            migrationDrillBody.innerHTML = `
+                <div class="market-intel-empty mb-3">此演練只集中正式 migration 前的只讀探測、人工套用清單與回滾演練；API 不執行 psql、不寫 DB、不跑 rollback、不重啟容器。${blockers ? `阻擋：${escapeHtml(blockers)}` : ''}</div>
+                <div class="market-intel-empty mb-3">schema_missing=${escapeHtml((schema.missing_tables || []).length)} / seed_missing=${escapeHtml((seedDiff.missing_codes || []).length)} / command=${escapeHtml(commands.migration_apply || '')}</div>
+                <div class="market-intel-deploy-grid">
+                    <div data-market-intel-migration-drill-checks>
+                        <p class="market-intel-deploy-section-title">DRILL CHECKS</p>
+                        <div class="market-intel-check-list">${
+                            checks.length
+                                ? checks.map(([name, passed]) => `
+                                    <div class="market-intel-check">
+                                        <div>
+                                            <strong>${escapeHtml(name)}</strong>
+                                        </div>
+                                        <span>${passed ? 'PASS' : 'BLOCK'}</span>
+                                    </div>
+                                `).join('')
+                                : '<div class="market-intel-empty">尚未提供 drill check。</div>'
+                        }</div>
+                    </div>
+                    <div data-market-intel-migration-drill-preapply>
+                        <p class="market-intel-deploy-section-title">PRE-APPLY</p>
+                        <div class="market-intel-check-list">${
+                            preApply.length
+                                ? preApply.map(renderStep).join('')
+                                : '<div class="market-intel-empty">尚未提供套用前清單。</div>'
+                        }</div>
+                    </div>
+                    <div data-market-intel-migration-drill-postapply>
+                        <p class="market-intel-deploy-section-title">POST-APPLY</p>
+                        <div class="market-intel-check-list">${
+                            postApply.length
+                                ? postApply.map(renderStep).join('')
+                                : '<div class="market-intel-empty">尚未提供套用後驗證。</div>'
+                        }</div>
+                    </div>
+                    <div data-market-intel-migration-drill-rollback>
+                        <p class="market-intel-deploy-section-title">ROLLBACK DRILL</p>
+                        <div class="market-intel-check-list">
+                            <div class="market-intel-check">
+                                <div>
+                                    <strong>${escapeHtml(rollback.mode || 'rollback_drill')}</strong>
+                                    <small>${escapeHtml(rollback.manual_command_shape || '')}</small>
+                                </div>
+                                <span>${rollback.rollback_executed ? 'EXECUTED' : 'MANUAL'}</span>
+                            </div>
+                            ${(rollback.fallback_first || []).map((item, index) => `
+                                <div class="market-intel-check">
+                                    <div>
+                                        <strong>${escapeHtml(`fallback_${index + 1}`)}</strong>
+                                        <small>${escapeHtml(item)}</small>
+                                    </div>
+                                    <span>FIRST</span>
+                                </div>
+                            `).join('')}
+                        </div>
+                    </div>
+                    <div data-market-intel-migration-drill-risks>
+                        <p class="market-intel-deploy-section-title">RISK REGISTER</p>
+                        <div class="market-intel-check-list">${
+                            risks.length
+                                ? risks.map(item => `
+                                    <div class="market-intel-check">
+                                        <div>
+                                            <strong>${escapeHtml(item.key)}</strong>
+                                            <small>${escapeHtml(item.label)}</small>
+                                        </div>
+                                        <span>${escapeHtml(item.severity || 'medium').toUpperCase()}</span>
+                                    </div>
+                                `).join('')
+                                : '<div class="market-intel-empty">尚未提供風險清單。</div>'
+                        }</div>
+                    </div>
+                </div>
+            `;
+        };
+
+        const loadMigrationDrill = async () => {
+            if (!migrationDrillMeta || !migrationDrillBody) return;
+            migrationDrillBody.innerHTML = '<div class="market-intel-empty">讀取 migration 套用演練中...</div>';
+            try {
+                const response = await fetch(migrationDrillEndpoint, { credentials: 'same-origin' });
+                if (!response.ok) throw new Error(`HTTP ${response.status}`);
+                const data = await response.json();
+                renderMigrationDrillMeta(data);
+                renderMigrationDrillBody(data);
+            } catch (error) {
+                migrationDrillMeta.innerHTML = '<span class="market-intel-pill">error</span>';
+                migrationDrillBody.innerHTML = `<div class="market-intel-empty">migration 套用演練讀取失敗：${escapeHtml(error.message)}</div>`;
+            }
+        };
+
         const renderApprovalMeta = data => {
             approvalMeta.innerHTML = [
                 `mode=${data.mode || 'unknown'}`,
@@ -2500,6 +2643,9 @@
         if (migrationRefresh) {
             migrationRefresh.addEventListener('click', loadMigration);
         }
+        if (migrationDrillRefresh) {
+            migrationDrillRefresh.addEventListener('click', loadMigrationDrill);
+        }
         if (approvalRefresh) {
             approvalRefresh.addEventListener('click', loadApproval);
         }
@@ -2523,6 +2669,7 @@
         loadOpportunityEvidence();
         loadOpportunityAlert();
         loadMigration();
+        loadMigrationDrill();
         loadApproval();
         loadDeploy();
     })();

tests/test_market_intel_skeleton.py

@@ -484,6 +484,10 @@ def test_market_intel_preview_template_uses_safe_fetch_false_endpoint():
     assert "data-market-intel-opportunity-alert-sequence" in template
     assert "data-market-intel-migration" in template
     assert "data-market-intel-migration-tables" in template
+    assert "data-market-intel-migration-drill" in template
+    assert "data-market-intel-migration-drill-checks" in template
+    assert "data-market-intel-migration-drill-preapply" in template
+    assert "data-market-intel-migration-drill-rollback" in template
     assert "data-market-intel-approval" in template
     assert "data-market-intel-approval-gates" in template
     assert "data-market-intel-deploy" in template
@@ -506,6 +510,7 @@ def test_market_intel_preview_template_uses_safe_fetch_false_endpoint():
     assert "market_intel.market_intel_opportunity_evidence_plan" in template
     assert "market_intel.market_intel_opportunity_alert_plan" in template
     assert "market_intel.market_intel_migration_blueprint" in template
+    assert "market_intel.market_intel_migration_apply_drill" in template
     assert "market_intel.market_intel_write_approval_runbook" in template
     assert "market_intel.market_intel_deployment_readiness" in template
     assert "required_manual_steps" in template
@@ -530,7 +535,7 @@ def test_legacy_source_bridge_default_is_planned_only():
     bridge = MarketIntelService().build_legacy_source_bridge()
 
     assert bridge["mode"] == "legacy_source_bridge_planned"
-    assert bridge["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert bridge["phase"] == "phase_43_migration_apply_drill_preview"
     assert bridge["execute_requested"] is False
     assert bridge["read_only_query_executed"] is False
     assert bridge["database_connection_opened"] is False
@@ -688,7 +693,7 @@ def test_mcp_tool_contract_preview_is_read_only_and_whitelisted():
     contract = MarketIntelService().build_mcp_tool_contract()
 
     assert contract["mode"] == "mcp_tool_contract_preview"
-    assert contract["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert contract["phase"] == "phase_43_migration_apply_drill_preview"
     assert contract["caller"] == "market_intel"
     assert contract["contract_ready"] is True
     assert contract["blocked_reasons"] == []
@@ -821,7 +826,7 @@ def test_mcp_activation_runbook_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "mcp_activation_runbook_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["deployment_actions_executed"] is False
     assert data["docker_command_executed"] is False
     assert data["ssh_command_executed"] is False
@@ -834,7 +839,7 @@ def test_mcp_fetch_gate_default_blocks_external_fetch():
     gate = MarketIntelService().build_mcp_fetch_gate(fetch_requested=True)
 
     assert gate["mode"] == "mcp_fetch_gate_planned"
-    assert gate["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert gate["phase"] == "phase_43_migration_apply_drill_preview"
     assert gate["fetch_requested"] is True
     assert gate["manual_fetch_gate_open"] is False
     assert gate["network_request_allowed"] is False
@@ -904,7 +909,7 @@ def test_mcp_fetch_gate_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "mcp_fetch_gate_planned"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["fetch_requested"] is False
     assert data["network_request_allowed"] is False
     assert data["external_network_executed"] is False
@@ -916,7 +921,7 @@ def test_scheduler_plan_preview_blocks_job_attachment():
     plan = MarketIntelService().build_scheduler_plan()
 
     assert plan["mode"] == "scheduler_attach_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_to_attach_scheduler"] is False
     assert plan["scheduler_attached"] is False
     assert plan["scheduler_registration_executed"] is False
@@ -954,7 +959,7 @@ def test_scheduler_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "scheduler_attach_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["scheduler_registration_executed"] is False
     assert data["crawler_job_started"] is False
     assert data["external_network_executed"] is False
@@ -965,7 +970,7 @@ def test_match_review_plan_preview_blocks_auto_confirm():
     plan = MarketIntelService().build_match_review_plan()
 
     assert plan["mode"] == "match_review_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_for_review_queue"] is False
     assert plan["review_queue_created"] is False
     assert plan["auto_match_executed"] is False
@@ -1001,7 +1006,7 @@ def test_match_review_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "match_review_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["review_queue_created"] is False
     assert data["auto_confirm_executed"] is False
     assert data["external_network_executed"] is False
@@ -1012,7 +1017,7 @@ def test_opportunity_plan_preview_blocks_alerts_and_ai_summary():
     plan = MarketIntelService().build_opportunity_plan()
 
     assert plan["mode"] == "opportunity_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_for_opportunity_queue"] is False
     assert plan["opportunity_queue_created"] is False
     assert plan["threat_alert_dispatched"] is False
@@ -1053,7 +1058,7 @@ def test_opportunity_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "opportunity_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["opportunity_queue_created"] is False
     assert data["threat_alert_dispatched"] is False
     assert data["ai_summary_generated"] is False
@@ -1064,7 +1069,7 @@ def test_opportunity_scoring_plan_preview_blocks_scoring_and_alerts():
     plan = MarketIntelService().build_opportunity_scoring_plan()
 
     assert plan["mode"] == "opportunity_scoring_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_for_scoring_job"] is False
     assert plan["scoring_job_created"] is False
     assert plan["score_calculation_executed"] is False
@@ -1112,7 +1117,7 @@ def test_opportunity_scoring_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "opportunity_scoring_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["scoring_job_created"] is False
     assert data["score_calculation_executed"] is False
     assert data["sample_scores_generated"] is False
@@ -1124,7 +1129,7 @@ def test_opportunity_evidence_plan_preview_blocks_queries_and_alerts():
     plan = MarketIntelService().build_opportunity_evidence_plan()
 
     assert plan["mode"] == "opportunity_evidence_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_for_evidence_bundle"] is False
     assert plan["evidence_bundle_created"] is False
     assert plan["evidence_query_executed"] is False
@@ -1170,7 +1175,7 @@ def test_opportunity_evidence_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "opportunity_evidence_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["evidence_bundle_created"] is False
     assert data["evidence_query_executed"] is False
     assert data["sample_evidence_generated"] is False
@@ -1183,7 +1188,7 @@ def test_opportunity_alert_plan_preview_blocks_dispatch_and_llm_calls():
     plan = MarketIntelService().build_opportunity_alert_plan()
 
     assert plan["mode"] == "opportunity_alert_plan_preview"
-    assert plan["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert plan["phase"] == "phase_43_migration_apply_drill_preview"
     assert plan["ready_for_alert_candidates"] is False
     assert plan["alert_candidate_created"] is False
     assert plan["alert_queue_created"] is False
@@ -1268,7 +1273,7 @@ def test_opportunity_alert_plan_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "opportunity_alert_plan_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["alert_candidate_created"] is False
     assert data["alert_queue_created"] is False
     assert data["review_queue_created"] is False
@@ -1346,7 +1351,7 @@ def test_mcp_deploy_preflight_route_is_preview_only():
 
     assert response.status_code == 200
     assert data["mode"] == "mcp_external_deploy_preflight_preview"
-    assert data["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
     assert data["deployment_actions_executed"] is False
     assert data["docker_command_executed"] is False
     assert data["ssh_command_executed"] is False
@@ -1361,7 +1366,7 @@ def test_mcp_readiness_default_is_planned_only(monkeypatch):
     readiness = MarketIntelService().build_mcp_readiness()
 
     assert readiness["mode"] == "mcp_readiness_planned"
-    assert readiness["phase"] == "phase_42_alert_review_queue_migration_blueprint"
+    assert readiness["phase"] == "phase_43_migration_apply_drill_preview"
     assert readiness["execute_requested"] is False
     assert readiness["router_enabled"] is False
     assert readiness["external_mcp_complete"] is False
@@ -1754,6 +1759,7 @@ def test_deployment_readiness_reports_app_only_release_gate():
     assert readiness["checks"]["opportunity_scoring_plan_preview_safe"] is True
     assert readiness["checks"]["opportunity_evidence_plan_preview_safe"] is True
     assert readiness["checks"]["opportunity_alert_plan_preview_safe"] is True
+    assert readiness["checks"]["migration_apply_drill_preview_safe"] is True
     assert readiness["checks"]["writer_plan_dry_run_only"] is True
     assert readiness["writer_plan_summary"]["writes_executed"] is False
     assert "readiness_checks_not_all_passed" not in readiness["blocked_reasons"]
@@ -1780,11 +1786,17 @@ def test_deployment_readiness_reports_app_only_release_gate():
     assert "/api/market_intel/opportunity_scoring_plan" in readiness["production_smoke_targets"]
     assert "/api/market_intel/opportunity_evidence_plan" in readiness["production_smoke_targets"]
     assert "/api/market_intel/opportunity_alert_plan" in readiness["production_smoke_targets"]
+    assert "/api/market_intel/migration_apply_drill" in readiness["production_smoke_targets"]
     assert readiness["write_approval_runbook"]["ready_for_real_write"] is False
     assert readiness["write_approval_runbook"]["writes_executed"] is False
     assert readiness["migration_blueprint"]["migration_executed"] is False
     assert readiness["migration_blueprint"]["file_created"] is True
     assert readiness["migration_blueprint"]["file_matches_blueprint"] is True
+    assert readiness["migration_apply_drill"]["mode"] == "migration_apply_drill_preview"
+    assert readiness["migration_apply_drill"]["migration_executed"] is False
+    assert readiness["migration_apply_drill"]["rollback_executed"] is False
+    assert readiness["migration_apply_drill"]["database_write_executed"] is False
+    assert readiness["migration_apply_drill"]["api_executes_migration"] is False
     assert readiness["schema_db_probe"]["read_only_query_executed"] is False
     assert readiness["platform_seed_db_diff"]["read_only_query_executed"] is False
     assert readiness["legacy_source_bridge"]["read_only_query_executed"] is False
@@ -1898,6 +1910,133 @@ def test_migration_blueprint_is_additive_preview_only():
     assert "DROP TABLE IF EXISTS market_alert_review_queue" in blueprint["rollback_sql"]
 
 
+def test_migration_apply_drill_planned_is_safe_and_manual_only():
+    drill = MarketIntelService().build_migration_apply_drill()
+
+    assert drill["mode"] == "migration_apply_drill_preview"
+    assert drill["phase"] == "phase_43_migration_apply_drill_preview"
+    assert drill["execute_requested"] is False
+    assert drill["schema_state"] == "planned_no_db_probe"
+    assert drill["drill_ready_for_operator_review"] is True
+    assert drill["ready_for_manual_apply_review"] is False
+    assert drill["ready_to_apply_migration"] is False
+    assert drill["read_only_query_executed"] is False
+    assert drill["database_connection_opened"] is False
+    assert drill["database_session_created"] is False
+    assert drill["database_write_executed"] is False
+    assert drill["database_commit_executed"] is False
+    assert drill["migration_executed"] is False
+    assert drill["rollback_executed"] is False
+    assert drill["api_executes_migration"] is False
+    assert drill["api_executes_rollback"] is False
+    assert drill["checks"]["migration_file_matches_blueprint"] is True
+    assert drill["checks"]["forward_sql_additive_only"] is True
+    assert "read_only_db_probe_not_executed" in drill["blocked_reasons"]
+    assert "api_never_runs_migration" in drill["blocked_reasons"]
+    assert drill["rollback_drill"]["rollback_executed"] is False
+    assert drill["rollback_drill"]["requires_manual_approval"] is True
+    assert "market_alert_review_queue" in drill["rollback_drill"]["rollback_table_order"]
+    assert len(drill["pre_apply_checklist"]) >= 6
+    assert len(drill["post_apply_verification"]) >= 4
+    assert len(drill["risk_register"]) >= 4
+
+
+def test_migration_apply_drill_sqlite_read_only_reports_already_applied():
+    service = MarketIntelService()
+    seed_rows = service.build_platform_seed_plan()["seeds"]
+    engine = create_engine("sqlite:///:memory:")
+    with engine.begin() as conn:
+        conn.execute(
+            text(
+                """
+                CREATE TABLE market_platforms (
+                    code TEXT PRIMARY KEY,
+                    name TEXT,
+                    base_url TEXT,
+                    enabled BOOLEAN,
+                    crawl_policy_json TEXT
+                )
+                """
+            )
+        )
+        for table_name in MARKET_INTEL_TABLES:
+            if table_name == "market_platforms":
+                continue
+            conn.execute(text(f"CREATE TABLE {table_name} (id INTEGER PRIMARY KEY)"))
+        for seed in seed_rows:
+            conn.execute(
+                text(
+                    """
+                    INSERT INTO market_platforms
+                        (code, name, base_url, enabled, crawl_policy_json)
+                    VALUES
+                        (:code, :name, :base_url, :enabled, :crawl_policy_json)
+                    """
+                ),
+                {
+                    "code": seed["code"],
+                    "name": seed["name"],
+                    "base_url": seed["base_url"],
+                    "enabled": seed["enabled"],
+                    "crawl_policy_json": json.dumps(
+                        seed["crawl_policy_json"],
+                        ensure_ascii=False,
+                        sort_keys=True,
+                    ),
+                },
+            )
+
+    drill = service.build_migration_apply_drill(
+        execute_requested=True,
+        schema_engine=engine,
+        seed_diff_engine=engine,
+        database_type="sqlite",
+    )
+
+    assert drill["mode"] == "migration_apply_drill_preview"
+    assert drill["execute_requested"] is True
+    assert drill["read_only_query_executed"] is True
+    assert drill["database_connection_opened"] is True
+    assert drill["schema_state"] == "already_applied"
+    assert drill["schema_db_probe_summary"]["schema_tables_exist"] is True
+    assert drill["schema_db_probe_summary"]["missing_tables"] == []
+    assert drill["platform_seed_db_diff_summary"]["seed_rows_ready"] is True
+    assert set(drill["platform_seed_db_diff_summary"]["matching_codes"]) == {
+        "momo",
+        "pchome",
+        "coupang",
+        "shopee",
+    }
+    assert drill["database_session_created"] is False
+    assert drill["database_write_executed"] is False
+    assert drill["database_commit_executed"] is False
+    assert drill["migration_executed"] is False
+    assert "market_schema_already_present_apply_not_required" in drill["blocked_reasons"]
+
+
+def test_migration_apply_drill_route_is_preview_only():
+    from routes.market_intel_routes import market_intel_bp
+
+    app = Flask(__name__)
+    app.secret_key = "test-secret"
+    app.register_blueprint(market_intel_bp)
+    client = app.test_client()
+    with client.session_transaction() as session:
+        session["logged_in"] = True
+
+    response = client.get("/api/market_intel/migration_apply_drill?execute=false")
+    data = response.get_json()
+
+    assert response.status_code == 200
+    assert data["mode"] == "migration_apply_drill_preview"
+    assert data["phase"] == "phase_43_migration_apply_drill_preview"
+    assert data["execute_requested"] is False
+    assert data["migration_executed"] is False
+    assert data["rollback_executed"] is False
+    assert data["database_write_executed"] is False
+    assert data["api_executes_migration"] is False
+
+
 def test_seed_writer_cli_status_blocks_real_write():
     status = MarketIntelService().build_seed_writer_cli_status(
         platform_code="all",