Initial TrueGrowth source import

openspec/changes/archive/2026-04-29-add-ppt-slide-transitions/tasks.md

@@ -0,0 +1,28 @@
+## 1. Data Model
+
+- [x] 1.1 Add PPT slide transition types and sanitization helpers.
+- [x] 1.2 Extend `PPTFrameMeta` with optional transition metadata.
+
+## 2. Editor UI
+
+- [x] 2.1 Add a right-click animation/transition submenu for single PPT pages.
+- [x] 2.2 Show the currently selected transition in the submenu.
+- [x] 2.3 Persist transition changes through `setFramePPTMeta`.
+
+## 3. Playback
+
+- [x] 3.1 Make `FrameSlideshow` read per-page transition metadata.
+- [x] 3.2 Apply matching lightweight CSS transition effects when navigating pages.
+- [x] 3.3 Respect reduced-motion preferences by falling back to no animation.
+
+## 4. PPTX Export
+
+- [x] 4.1 Change PPT export to produce a Blob/ArrayBuffer before download.
+- [x] 4.2 Patch generated slide XML with transition tags for supported transition types.
+- [x] 4.3 Preserve existing export behavior when no transitions are configured.
+
+## 5. Tests
+
+- [x] 5.1 Add unit tests for transition metadata normalization.
+- [x] 5.2 Add unit tests for PPTX transition XML injection.
+- [x] 5.3 Run targeted PPT tests and a focused typecheck if feasible.