Feat: update CHANGELOG

CHANGELOG.md

@@ -2,6 +2,48 @@
 
 All notable changes to this project will be documented in this file.
 
+## [0.1.0]
+
+### CLAP Plugin (experimental)
+- Early CLAP plugin support via nih-plug, baseview, and egui. Feature-gated builds separate CLI from plugin targets.
+
+### Forth Language
+- `case/of/endof/endcase` control flow for pattern-matching dispatch.
+- `bjork` / `pbjork` — euclidean rhythm gates using quotations: execute a block only on Bjorklund-distributed hits.
+- `arp` — arpeggio list type that spreads notes across time positions instead of stacking them simultaneously.
+- `,varname` assignment syntax (SetKeep): assign to a variable without consuming the value from the stack.
+- `every` reworked to accept quotations for cleaner conditional step logic.
+- All parameter words now accept varargs — over 100 words updated to consume the full stack.
+- Reverb parameter words added.
+
+### Engine
+- Delta-time MIDI scheduling for tighter, sample-accurate timing.
+- Tempo and current beat exposed in sequencer snapshot.
+- Spectrum analyzer rescaling.
+
+### UI / UX
+- Mouse support: click navigation on the pattern grid, panels, and modals.
+- F1–F6 page navigation across the 3×2 page grid.
+- Collapsible help sections with code block copy.
+- Onboarding system for first-time users.
+- New reusable widgets: CategoryList, HintBar, PropsForm, ScrollIndicators, SearchBar, SectionHeader.
+- Show/hide preview pane toggle and zoom factor setting.
+
+### Documentation
+- Complete reorganization into `docs/` subdirectories.
+- 10 getting-started guides, 5 interactive tutorials.
+- New topics: control flow, generators, harmony, randomness, variables, timing.
+
+### Theme System
+- Palette-based generation: all 18 themes now derived from a 14-field Palette via Oklab color space.
+- Theme definitions reduced from ~300 lines each to ~20 lines.
+
+### Codebase
+- `src/app.rs` split into 10 focused modules (dispatch, clipboard, editing, navigation, persistence, scripting, sequencer, staging, undo).
+- `src/input.rs` split into 8 page-specific handlers.
+- Undo/redo system with scope-based tracking.
+- Feature-gated CLI vs plugin builds.
+
 ## [0.0.9]
 
 ### Website