docs: add CHANGELOG.md and link from README

CHANGELOG.md

@@ -0,0 +1,49 @@
+# Changelog
+
+All notable changes to PinchChat are documented here.
+
+Format based on [Keep a Changelog](https://keepachangelog.com/), with [Conventional Commits](https://www.conventionalcommits.org/).
+
+## [Unreleased]
+
+### Added
+- **Scroll-to-bottom button** — appears when scrolled up in chat, click to jump to latest messages (`b56c80a`)
+- **Inline image display** — images render directly in chat with a click-to-expand lightbox (`762a5f2`)
+- **Logo integration** — PinchChat logo in header, login screen, favicon, and OG meta tags (`97c16be`)
+- **GitHub Pages landing page** — feature showcase at [marlburrow.github.io/pinchchat](https://marlburrow.github.io/pinchchat/) (`4f47732`)
+- **Docker support** — Dockerfile, docker-compose.yml, CI auto-publish to `ghcr.io/marlburrow/pinchchat` (`5fd7300`)
+- **Language selector** — toggle EN/FR in the header at runtime (`9b3aed4`)
+- **Copy button on code blocks** — one-click copy for code snippets (`b6a989b`)
+- **i18n support** — English and French UI via `VITE_LOCALE` env var (`99b7db9`)
+- **Runtime login screen** — enter gateway credentials at runtime, no secrets baked into the build (`36f9480`)
+- **NO_REPLY filtering** — silently hides agent NO_REPLY messages from the chat (`8834b2a`)
+- **GitHub Actions CI** — lint and build checks on every push and PR (`a6b26b0`)
+- **Issue templates** — bug report and feature request forms (`2d3ee47`)
+- **Contributing guide** — CONTRIBUTING.md with dev setup and PR guidelines (`e34643d`)
+
+### Changed
+- **Architecture diagram** — replaced ASCII art with a Mermaid diagram in the README (`02d2ab3`)
+- **Smart auto-scroll** — only auto-scrolls when the user is near the bottom (`3e7a596`)
+- **Timestamp locale** — uses the selected i18n locale instead of hardcoded `fr-FR` (`88c393e`)
+- **Vendor code-splitting** — split React and markdown dependencies into separate chunks, eliminating the 500KB bundle warning (`d7bdf3b`)
+
+### Fixed
+- Corrected `index.html` lang attribute, page title, favicon path, and added SEO meta tags (`24c7d00`)
+- Localized all hardcoded French strings to English with ARIA accessibility attributes (`3370916`)
+- Fixed OpenClaw repo link in README (`604f902`)
+
+### Renamed
+- **ClawChat → PinchChat** — full project rename across all files, configs, and docs (`d58c34f`)
+
+## [1.0.0] — 2026-02-11
+
+Initial release as ClawChat.
+
+- Dark neon theme with Tailwind CSS v4
+- WebSocket connection to OpenClaw gateway
+- Session sidebar with token usage progress bars
+- Markdown rendering with GFM and syntax highlighting
+- Tool call badges with expandable JSON panels
+- Thinking block display (collapsible)
+- File upload with image compression and drag & drop
+- Streaming response display

README.md

@@ -136,6 +136,10 @@ graph TD
 
 [MIT](LICENSE) © Nicolas Varrot
 
+## 📋 Changelog
+
+See [CHANGELOG.md](CHANGELOG.md) for a detailed history of changes.
+
 ## 🤝 Contributing
 
 Contributions are welcome! See [CONTRIBUTING.md](CONTRIBUTING.md) for guidelines.