WebGPU/WebGL rendering

.claude/projects/-home-cdiesh-src-jbrowse-components/memory/project_webgl_migration.md

@@ -0,0 +1,47 @@
+---
+name: WebGL/WebGPU Migration
+description:
+  Active migration to GPU-accelerated rendering with three backends (WebGPU,
+  WebGL2, Canvas 2D). Tracks progress on PRD items.
+type: project
+---
+
+Branch: `webgl-poc`, PRD at repo root `/PRD.md`
+
+## Completed (as of 2026-03-19)
+
+- **P1.1 Canvas 2D Fallback**: All 10 track types have Canvas 2D fallback
+  renderers
+- **P1.2 Data Fetching**: Replaced legacy `staticRegions` with viewport-based
+  `mergedVisibleRegions` + 50% buffer; integrated `isCacheValid()` for wiggle
+  resolution re-fetch; error recovery on zoom
+- **P1.4 Session Migration**: Snapshot migration for old display types and
+  property names — `migrateWiggleSnapshot`, `migrateAlignmentsSnapshot`,
+  `migrateSessionSnapshot`/`migrateConfigSnapshot` (49 tests total). Wired into
+  session loading and config loading paths.
+- **P2.1 Alignments**: Mapping quality legend, outline when compact, arc alpha
+  fix, linked read snapshot migration
+- **P2.2 Wiggle**: Cross-hatches (displayCrossHatches toggle + SVG overlay)
+- **Effective Track Config**: `effectiveTrackConfig` getter on displays bakes
+  session overrides into track config snapshots for "Copy config" in About track
+  dialog (14 tests)
+- **Tests**: 63+ new tests across 5 suites
+
+## Architecture: Config Override Pattern
+
+Display models have `*Setting` properties (e.g., `colorSetting`) that override
+config slots. Getters merge them:
+`get color() { return self.colorSetting ?? getConf(self, 'color') }`. The
+`effectiveTrackConfig` getter iterates config slots and compares against display
+getters to produce a config snapshot with overrides baked in. Plan to simplify
+this in `CONFIG_SIMPLIFICATION.md`.
+
+## Next Priority Items
+
+- P2.3: Hs1 vs mm39 synteny excessively slow
+- P3.1: Closing track errors (getContainingView throws on detached model)
+- P1.3: Expand browser test suite
+- Add `effectiveTrackConfig` override to remaining display types
+
+**Why:** These are the highest-impact remaining issues per PRD analysis. **How
+to apply:** Check PRD.md for full item list and demo inventory status.

.github/workflows/publish.yml

@@ -13,13 +13,13 @@ jobs:
       id-token: write
       contents: read
     steps:
-      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           persist-credentials: false
-      - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
+      - uses: pnpm/action-setup@fc06bc1257f339d1d5d8b3a19a8cae5388b55320 # v5.0.0
         with:
           version: 10
-      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '24'
           cache: pnpm