chore: Add changelog and issue templates

- CHANGELOG.md: Keep a Changelog format, semantic versioning
- Issue templates: bug report, feature request, MVP task
- Ready for issue tracking on Gitea

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug Report
+about: Report a bug or unexpected behavior
+labels: bug
+---
+
+## Description
+A clear description of the bug.
+
+## Steps to Reproduce
+1. Go to '...'
+2. Click on '...'
+3. Scroll down to '...'
+4. See error
+
+## Expected Behavior
+What you expected to happen.
+
+## Actual Behavior
+What actually happened.
+
+## Screenshots
+If applicable, add screenshots to help explain the problem.
+
+## Environment
+- **Device:** (e.g., iPhone 14, Desktop)
+- **OS:** (e.g., iOS 17, Ubuntu 24.04)
+- **Browser:** (e.g., Safari 17, Chrome 120)
+- **Pantry Version:** (e.g., v0.1.0)
+
+## Additional Context
+Any other relevant information.
+
+## Possible Solution
+(Optional) Suggest a fix or reason for the bug.

.gitea/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest a new feature or enhancement
+labels: enhancement
+---
+
+## Problem
+A clear description of the problem this feature would solve.
+(e.g., "I'm always frustrated when...")
+
+## Proposed Solution
+Describe the solution you'd like to see.
+
+## Alternatives Considered
+Describe any alternative solutions or features you've considered.
+
+## Use Case
+How would you use this feature? Who else would benefit?
+
+## Additional Context
+Add any other context, mockups, or screenshots about the feature request.
+
+## Implementation Ideas
+(Optional) Any technical suggestions for how this could be implemented.

.gitea/ISSUE_TEMPLATE/mvp_task.md

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+---
+name: MVP Task
+about: Task for the MVP (v0.1) release
+labels: mvp, enhancement
+---
+
+## Task Description
+Brief description of what needs to be done.
+
+## Acceptance Criteria
+- [ ] Criterion 1
+- [ ] Criterion 2
+- [ ] Criterion 3
+
+## Technical Details
+- **Related files/components:**
+- **Database changes:** (if any)
+- **Dependencies:** (other issues that must be completed first)
+
+## Resources
+- Link to relevant documentation
+- Design mockups (if applicable)
+- API references
+
+## Testing
+How should this be tested?
+
+## Estimated Effort
+(e.g., 1 day, 3 days, 1 week)
+
+## Notes
+Any additional context or considerations.

CHANGELOG.md

@@ -0,0 +1,84 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Planning
+- Complete project documentation suite
+- 6-week MVP roadmap defined
+- Tech stack decisions locked in
+
+---
+
+## [0.1.0] - TBD
+
+**MVP Release** - First usable version
+
+### Added
+- PWA with offline support
+- Barcode scanning via camera
+- Open Food Facts integration
+- Tag-based inventory organization
+- Unit conversion system (metric defaults)
+- Multi-user authentication (email/password)
+- Basic CRUD for inventory items
+- Search and filter functionality
+
+### Infrastructure
+- Nuxt 4 frontend
+- Supabase backend (self-hosted)
+- Docker Compose deployment
+- Coolify deployment guide
+
+---
+
+## [0.0.1] - 2026-02-08
+
+### Added
+- Initial project structure
+- Comprehensive documentation:
+  - README with project overview
+  - PROJECT_PLAN with 6-week roadmap
+  - ARCHITECTURE with system design
+  - DATABASE schema and RLS policies
+  - API reference for Supabase + Edge Functions
+  - DEVELOPMENT setup and workflow guide
+  - DEPLOYMENT guide for Docker + Coolify
+- MIT License
+- Organization and repository on Gitea
+
+---
+
+## Template for Future Releases
+
+```markdown
+## [X.Y.Z] - YYYY-MM-DD
+
+### Added
+- New features
+
+### Changed
+- Changes in existing functionality
+
+### Deprecated
+- Soon-to-be removed features
+
+### Removed
+- Removed features
+
+### Fixed
+- Bug fixes
+
+### Security
+- Security improvements
+```
+
+---
+
+[Unreleased]: https://gitea.jeanlucmakiola.de/pantry-app/pantry/compare/v0.0.1...HEAD
+[0.1.0]: https://gitea.jeanlucmakiola.de/pantry-app/pantry/releases/tag/v0.1.0
+[0.0.1]: https://gitea.jeanlucmakiola.de/pantry-app/pantry/releases/tag/v0.0.1