test: migrate app apis controller tests to testcontainers

[YB0y]

Summary

Migrate tests from api/tests/unit_tests/controllers/console/app/test_app_apis.py to testcontainers integration tests at api/tests/test_containers_integration_tests/controllers/console/app/test_app_apis.py.

Replaced Flask(__name__) with flask_app_with_containers fixture across all test classes that use request context. All 30 tests migrated covering: completion endpoints (payload validation, success/error paths), app endpoints (icon type preservation, payload validation), ops trace endpoints (get/post/delete), site endpoints (update/token reset), workflow endpoints (payload, app log, draft variable, statistics, triggers), MCP server payloads, error handling, and payload integration tests. Service calls remain mocked as tests verify controller routing and response mapping logic.

Part of #32454

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues.
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint and make type-check (backend) and cd web && npx lint-staged (frontend) to appease the lint gods

[github-actions]

Pyrefly Diff

base → PR

--- /tmp/pyrefly_base.txt	2026-03-30 14:27:17.927766448 +0000
+++ /tmp/pyrefly_pr.txt	2026-03-30 14:27:07.052742361 +0000
@@ -660,6 +660,8 @@
   --> tests/integration_tests/workflow/nodes/test_tool.py:65:16
 ERROR `dict[str, str | None]` is not assignable to attribute `env` with type `dict[str, str]` [bad-assignment]
    --> tests/test_containers_integration_tests/conftest.py:207:39
+ERROR Argument value `Literal[0]` violates Pydantic `ge` constraint `Literal[1]` for field `page` [bad-argument-type]
+   --> tests/test_containers_integration_tests/controllers/console/app/test_app_apis.py:579:51
 ERROR Argument `Literal['normal']` is not assignable to parameter `status` with type `SQLCoreOperations[TenantStatus] | TenantStatus` in function `models.account.Tenant.__init__` [bad-argument-type]
   --> tests/test_containers_integration_tests/controllers/console/app/test_chat_conversation_status_count_api.py:33:48
 ERROR Object of class `RequestError` has no attribute `response` [missing-attribute]
@@ -1768,8 +1770,6 @@
    --> tests/unit_tests/controllers/console/app/test_annotation_security.py:242:78
 ERROR Object of class `int` has no attribute `lower` [missing-attribute]
    --> tests/unit_tests/controllers/console/app/test_annotation_security.py:262:35
-ERROR Argument value `Literal[0]` violates Pydantic `ge` constraint `Literal[1]` for field `page` [bad-argument-type]
-   --> tests/unit_tests/controllers/console/app/test_app_apis.py:612:51
 ERROR Object of class `ModuleType` has no attribute `console_ns` [missing-attribute]
   --> tests/unit_tests/controllers/console/app/test_app_response_models.py:70:5
 ERROR Object of class `ModuleType` has no attribute `api` [missing-attribute]