Status LEDs, image model selection, backup restore, provider test, monthly versions

- Sidebar: three status LEDs (server, models, MCP) with an overview popover (/api/status)
- Images: preview stage, purpose-based model choice and reference images
  (Nano Banana Pro edit refines the chosen preview)
- Settings: restore a stored or uploaded backup (staged, applied on restart)
- Provider form: test connection; saving or reloading re-checks the status at once
- opencode Zen/Go: send x-opencode-session with a stable id per conversation
- Releases are named vYYYYMM-NNNNN; scripts/release.sh numbers, tags, builds and publishes
- Fix: backups made in the same second no longer overwrite each other

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -3,6 +3,35 @@
 All notable changes to CodeCraft. Versions follow [Semantic Versioning](https://semver.org/);
 until 1.0, minor versions may contain breaking changes.
 
+## [Unreleased]
+
+### Added
+
+- **Image generation picks the model:** the agent drafts cheap previews, asks which one to
+  refine (with the price of the final model), then creates the final image with the best model
+  for the purpose (photo, illustration, text, design). Models that take a reference image
+  (Nano Banana Pro edit) refine the chosen draft. Known fal.ai models come with sensible
+  defaults; `stage`, `good_for` and `reference_param` in `[images].models` override them.
+- **Restore a backup** in *Settings → Audit*: a stored backup or an uploaded zip. The current
+  state is backed up first (`…-before-restore.zip`), then CodeCraft restarts with the restored
+  database and configuration.
+- **Test connection** in the provider form checks URL and key before saving.
+- **Status LEDs** in the sidebar for server connection, models and MCP servers (green, yellow,
+  red in vivid variants of the theme colors); a click opens an overview of every provider and
+  MCP server with its state, latency and tool count.
+- `scripts/release.sh`: tag, multi-arch image and Gitea release in one step.
+
+### Changed
+
+- Saving a provider (or reloading providers) checks its status right away instead of at the
+  next five-minute check.
+
+### Fixed
+
+- opencode Zen/Go: requests carry the session in `x-opencode-session`; opencode Go rejected
+  them without it ("Request is missing x-opencode-session").
+- Two backups in the same second no longer overwrite each other.
+
 ## [0.1.0] – 2026-11-09
 
 First public release.