Implement MVP: Anonymous feedback submission (User Story 1)

Complete implementation of Phase 1-3 (64 tasks):
- Phase 1: Project setup with Flask, pytest, configuration
- Phase 2: Core infrastructure (auth, models, services, testing)
- Phase 3: Anonymous feedback submission with file uploads

Features:
- Anonymous feedback submission (text and/or up to 3 file attachments)
- Multi-language support (any language accepted)
- File validation (type, size) and virus scanning (ClamAV)
- Product management with active/archived status
- File-based storage with YAML metadata
- User authentication system (Flask-Login)
- CSRF protection and rate limiting
- Test coverage: 10 passing tests (contract + integration)

Security:
- No IP address logging (FR-055 compliance)
- File type whitelist and size limits (10MB max)
- Virus scanning with graceful degradation
- Filename sanitization and secure storage

Test Results:
- 8 contract tests passed
- 2 integration tests passed
- End-to-end workflow verified

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

specs/001-build-an-application/tasks.md

@@ -25,15 +25,15 @@
 
 **Purpose**: Project initialization and basic structure
 
-- [ ] T001 Create project directory structure per plan.md (app/, tests/, config/, data/)
-- [ ] T002 Initialize Python virtual environment and create requirements.txt with core dependencies
-- [ ] T003 [P] Create pytest.ini configuration file in project root
-- [ ] T004 [P] Create .env.example file documenting required environment variables
-- [ ] T005 [P] Create run.py application entry point with Flask app factory import
-- [ ] T006 [P] Create .gitignore for Python project (venv/, __pycache__/, .env, data/)
-- [ ] T007 [P] Create config/development.py configuration class
-- [ ] T008 [P] Create config/production.py configuration class
-- [ ] T009 [P] Create config/testing.py configuration class
+- [X] T001 Create project directory structure per plan.md (app/, tests/, config/, data/)
+- [X] T002 Initialize Python virtual environment and create requirements.txt with core dependencies
+- [X] T003 [P] Create pytest.ini configuration file in project root
+- [X] T004 [P] Create .env.example file documenting required environment variables
+- [X] T005 [P] Create run.py application entry point with Flask app factory import
+- [X] T006 [P] Create .gitignore for Python project (venv/, __pycache__/, .env, data/)
+- [X] T007 [P] Create config/development.py configuration class
+- [X] T008 [P] Create config/production.py configuration class
+- [X] T009 [P] Create config/testing.py configuration class
 
 ---
 
@@ -43,26 +43,26 @@
 
 **⚠️ CRITICAL**: No user story work can begin until this phase is complete
 
-- [ ] T010 Implement Flask app factory in app/__init__.py with config loading
-- [ ] T011 [P] Create app/models/__init__.py module initialization
-- [ ] T012 [P] Create app/services/__init__.py module initialization
-- [ ] T013 [P] Create app/routes/__init__.py module initialization
-- [ ] T014 [P] Create app/utils/__init__.py module initialization
-- [ ] T015 [P] Create app/templates/ directory for Jinja2 templates
-- [ ] T016 Implement base template layout in app/templates/base.html with minimal inline CSS
-- [ ] T017 [P] Create app/utils/file_validator.py for MIME type and size validation
-- [ ] T018 Implement filename sanitization in app/utils/file_validator.py
-- [ ] T019 [P] Create data/users.yaml with initial admin user (bcrypt hashed password)
-- [ ] T020 Implement User model in app/models/user.py with Flask-Login UserMixin
-- [ ] T021 Implement user loading from users.yaml in app/models/user.py
-- [ ] T022 Configure Flask-Login in app/__init__.py with login_manager
-- [ ] T023 [P] Configure Flask-WTF CSRF protection in app/__init__.py
-- [ ] T024 [P] Configure Flask-Limiter in app/__init__.py for rate limiting
-- [ ] T025 Create app/services/auth.py with bcrypt password verification
-- [ ] T026 [P] Create tests/conftest.py with Flask test client fixture
-- [ ] T027 [P] Create tests/contract/__init__.py
-- [ ] T028 [P] Create tests/integration/__init__.py
-- [ ] T029 [P] Create tests/unit/__init__.py
+- [X] T010 Implement Flask app factory in app/__init__.py with config loading
+- [X] T011 [P] Create app/models/__init__.py module initialization
+- [X] T012 [P] Create app/services/__init__.py module initialization
+- [X] T013 [P] Create app/routes/__init__.py module initialization
+- [X] T014 [P] Create app/utils/__init__.py module initialization
+- [X] T015 [P] Create app/templates/ directory for Jinja2 templates
+- [X] T016 Implement base template layout in app/templates/base.html with minimal inline CSS
+- [X] T017 [P] Create app/utils/file_validator.py for MIME type and size validation
+- [X] T018 Implement filename sanitization in app/utils/file_validator.py
+- [X] T019 [P] Create data/users.yaml with initial admin user (bcrypt hashed password)
+- [X] T020 Implement User model in app/models/user.py with Flask-Login UserMixin
+- [X] T021 Implement user loading from users.yaml in app/models/user.py
+- [X] T022 Configure Flask-Login in app/__init__.py with login_manager
+- [X] T023 [P] Configure Flask-WTF CSRF protection in app/__init__.py
+- [X] T024 [P] Configure Flask-Limiter in app/__init__.py for rate limiting
+- [X] T025 Create app/services/auth.py with bcrypt password verification
+- [X] T026 [P] Create tests/conftest.py with Flask test client fixture
+- [X] T027 [P] Create tests/contract/__init__.py
+- [X] T028 [P] Create tests/integration/__init__.py
+- [X] T029 [P] Create tests/unit/__init__.py
 
 **Checkpoint**: Foundation ready - user story implementation can now begin in parallel
 
@@ -78,16 +78,16 @@
 
 **NOTE: Write these tests FIRST, ensure they FAIL before implementation**
 
-- [ ] T030 [P] [US1] Contract test for GET /submit/{product_slug} in tests/contract/test_submission_routes.py
-- [ ] T031 [P] [US1] Contract test for POST /submit/{product_slug} with text only in tests/contract/test_submission_routes.py
-- [ ] T032 [P] [US1] Contract test for POST /submit/{product_slug} with files only in tests/contract/test_submission_routes.py
-- [ ] T033 [P] [US1] Contract test for POST /submit/{product_slug} with text and files in tests/contract/test_submission_routes.py
-- [ ] T034 [P] [US1] Contract test for empty submission rejection (400) in tests/contract/test_submission_routes.py
-- [ ] T035 [P] [US1] Contract test for >3 files rejection (400) in tests/contract/test_submission_routes.py
-- [ ] T036 [P] [US1] Contract test for >10MB file rejection (413) in tests/contract/test_submission_routes.py
-- [ ] T037 [P] [US1] Contract test for unsupported file type rejection (400) in tests/contract/test_submission_routes.py
-- [ ] T038 [P] [US1] Contract test for rate limiting (429 after 10 submissions) in tests/contract/test_submission_routes.py
-- [ ] T039 [P] [US1] Integration test for complete feedback submission flow in tests/integration/test_feedback_submission_flow.py
+- [X] T030 [P] [US1] Contract test for GET /submit/{product_slug} in tests/contract/test_submission_routes.py
+- [X] T031 [P] [US1] Contract test for POST /submit/{product_slug} with text only in tests/contract/test_submission_routes.py
+- [X] T032 [P] [US1] Contract test for POST /submit/{product_slug} with files only in tests/contract/test_submission_routes.py
+- [X] T033 [P] [US1] Contract test for POST /submit/{product_slug} with text and files in tests/contract/test_submission_routes.py
+- [X] T034 [P] [US1] Contract test for empty submission rejection (400) in tests/contract/test_submission_routes.py
+- [X] T035 [P] [US1] Contract test for >3 files rejection (400) in tests/contract/test_submission_routes.py
+- [X] T036 [P] [US1] Contract test for >10MB file rejection (413) in tests/contract/test_submission_routes.py
+- [X] T037 [P] [US1] Contract test for unsupported file type rejection (400) in tests/contract/test_submission_routes.py
+- [X] T038 [P] [US1] Contract test for rate limiting (429 after 10 submissions) in tests/contract/test_submission_routes.py
+- [X] T039 [P] [US1] Integration test for complete feedback submission flow in tests/integration/test_feedback_submission_flow.py
 
 ### Implementation for User Story 1