WIP: wasm compatible patcher?

wip/todo.md

@@ -4,43 +4,44 @@
 
 - [x] Device detection proof of concept (File System Access API)
 - [x] Serial prefix → model mapping (verified against official Kobo help page)
-- [x] Architecture planning
-- [x] Cloned kobopatch source (`kobopatch-src/`)
+- [x] Architecture planning (updated: fully client-side, no PHP backend)
+- [x] Installed Go via Homebrew (v1.26.1)
+- [x] Verified all kobopatch tests pass natively
+- [x] Verified all kobopatch tests pass under `GOOS=js GOARCH=wasm` (via Node.js)
+- [x] Updated device identification doc with correct model list
+- [x] Removed obsolete backend-api.md
+- [x] Created `kobopatch-wasm/` with setup.sh, build.sh, go.mod, main.go
+- [x] WASM wrapper compiles successfully (9.9MB)
+- [x] All kobopatch tests still pass with our module's replace directives
+- [x] Cleaned up .gitignore
 
 ## In Progress
 
-### WASM Build of kobopatch
+### Integration Testing
 
-- [ ] Write Go WASM wrapper (`kobopatch-src/wasm/`) exposing `PatchFirmware()` to JS
-  - Accepts: config YAML (bytes), firmware zip (bytes), patch YAML files (bytes)
-  - Returns: KoboRoot.tgz (bytes) or error
-  - All I/O in-memory, no filesystem access
-- [ ] Refactor `kobopatch/kobopatch.go` main logic into reusable function
-  - Strip `os.Open`/`os.Create` → use `io.Reader`/`io.Writer`
-  - Strip `os.Chdir` → resolve paths in memory
-  - Strip `exec.Command` (lrelease) → skip translations
-- [ ] Compile with `GOOS=js GOARCH=wasm go build`
-- [ ] Test WASM binary loads and runs in browser
+- [ ] Test WASM binary in actual browser (load wasm_exec.js + kobopatch.wasm)
+- [ ] Test `patchFirmware()` JS function end-to-end with real firmware zip + patches
 
 ### Frontend - Patch UI
 
-- [ ] `patch-ui.js` - parse patch YAML client-side, render grouped toggles
+- [ ] YAML parsing in JS (extract patch names, descriptions, enabled, PatchGroup)
+- [ ] `patch-ui.js` — render grouped toggles per target file
 - [ ] PatchGroup mutual exclusion (radio buttons)
-- [ ] Bundle patch YAML files as static assets (or fetch from known URL)
-- [ ] Generate kobopatch.yaml config from UI state
+- [ ] Generate kobopatch.yaml config string from UI state
 
 ### Frontend - Build Flow
 
-- [ ] User provides firmware zip (file input or drag-and-drop)
-- [ ] Load WASM module, pass firmware + config + patches
-- [ ] Receive KoboRoot.tgz blob from WASM
-- [ ] Write KoboRoot.tgz to device via File System Access API
-- [ ] Fallback: download KoboRoot.tgz if FS Access write fails
+- [ ] User provides firmware zip (file input / drag-and-drop)
+- [ ] Load WASM, call `patchFirmware()` with config + firmware + patch files
+- [ ] Receive KoboRoot.tgz blob, write to `.kobo/` via File System Access API
+- [ ] Fallback: download KoboRoot.tgz manually
+- [ ] Bundle patch YAML files as static assets
 
 ## Future / Polish
 
-- [ ] Browser compatibility warning with more detail
-- [ ] Loading/progress states during WASM build (Web Worker?)
+- [ ] Run WASM patching in a Web Worker (avoid blocking UI)
+- [ ] Browser compatibility warning with detail
+- [ ] Loading/progress states during build
 - [ ] Error handling for common failure modes
 - [ ] Host as static site (GitHub Pages / Netlify)
 - [ ] NickelMenu install/uninstall support (bonus feature)