* ci: skip PR runs when targeting a non-main base branch
Adds `branches: [main]` to the `pull_request:` trigger of each workflow
that runs on PRs (CI, regression, Windows render verification, Docs,
Catalog Previews). PRs whose base is something other than main — typical
for stacked PRs — no longer trigger these workflows.
On a 5-PR Graphite stack this turns 5× CI runs into 1× (when the tip
of the stack reaches main). When a child PR is rebased/promoted so its
base becomes main, CI fires as normal.
publish.yml and the default CodeQL setup are untouched: publish already
filters to main, and CodeQL is default-setup (org UI, not a repo YAML).
* chore(ci): fix oxfmt formatting on renovate.json
Same drive-by as #423. Renovate's config-migration PR #422 landed
unformatted (Renovate bot skips lefthook), so every PR branched from
current main fails `bun run format:check`. Whichever of #423 / #426
merges first cleans it up.
## What
Add 28 transition blocks from the Hyperframe Template Structure catalog, bringing the registry to 53 total items.
### Shader transitions (14 blocks, WebGL, 4s each)
`domain-warp-dissolve`, `ridged-burn`, `whip-pan`, `sdf-iris`, `ripple-waves`, `gravitational-lens`, `cinematic-zoom`, `chromatic-radial-split`, `glitch`, `swirl-vortex`, `thermal-distortion`, `flash-through-white`, `cross-warp-morph`, `light-leak`
### CSS transition showcases (14 blocks, various durations)
`transitions-3d`, `transitions-blur`, `transitions-cover`, `transitions-destruction`, `transitions-dissolve`, `transitions-distortion`, `transitions-grid`, `transitions-light`, `transitions-mechanical`, `transitions-other`, `transitions-push`, `transitions-radial`, `transitions-scale`, `transitions-shader`
## Why
Phase D content accumulation. Transitions are the most-requested category for the catalog.
## How
- Shader transitions extracted from `shader-showcase.zip`, each a standalone HTML with WebGL shaders
- CSS transitions extracted from `showcase-bundle.zip`, each a standalone showcase page
- All tagged with `transition` + `shader` or `showcase` for catalog grouping
- Preview thumbnails generated for all 28 blocks
- Catalog pages + index regenerated
## Test plan
- [x] All 28 blocks produce preview thumbnails
- [x] `registry-item.json` validates for all blocks
- [x] Catalog pages generated (45 total items in catalog-index.json)
- [x] `oxfmt --check` passes
## What
CI workflow that auto-renders preview thumbnails for new/changed registry blocks and components on pull requests.
**New files:**
- `scripts/generate-catalog-previews.ts` — catalog preview renderer supporting all three registry item types
- `.github/workflows/catalog-previews.yml` — GitHub Actions workflow triggered on PRs touching `registry/blocks/` or `registry/components/`
## Why
Phase B of the catalog plan (PR 8). After this lands, future block/component PRs don't need to manually generate preview images — CI handles it automatically.
## How
The preview script discovers items from the registry directory structure:
- **Examples**: renders `index.html` (same as the existing `generate-template-previews.ts`)
- **Blocks**: renders the block's standalone HTML file directly (e.g., `data-chart.html`)
- **Components**: renders the component's `demo.html` (the demo.html convention from PR 7)
The CI workflow:
1. Detects which blocks/components changed in the PR via `git diff`
2. Renders thumbnails for only the changed items (not the full catalog)
3. Uploads preview PNGs as artifacts
Output goes to `docs/images/catalog/<type>/<name>.{png,mp4}` (separate from the existing `docs/images/templates/` directory).
Supports CLI flags: `--only <name>`, `--type <example|block|component>`, `--skip-video`.
## Test plan
- [x] Script compiles and passes typecheck (`lefthook pre-commit` ran lint + typecheck + format)
- [x] Workflow YAML is valid (standard GitHub Actions syntax, follows existing ci.yml patterns)
- [ ] Full end-to-end test requires Chrome + FFmpeg (runs in CI, not testable locally without producer deps)
renovate[bot]