## [2026-02-02] Task 1 - Engine Component Refactoring Complete

**What was done**:
- Replaced old state variables (`currentSectionAxis`, `isSectionBoxActive`) with unified `currentSectionMode`
- Removed all old clipping methods (~175 lines):
  - `activateSectionAxis()`, `deactivateSectionAxis()`, `deactivateCurrentSectionAxis()`, `getCurrentSectionAxis()`
  - `activateSectionBox()`, `deactivateSectionBox()`, `fitSectionBoxToModel()`, `resetSectionBox()`
- Implemented new unified API (4 methods, ~38 lines):
  - `activeSection(mode)` - unified activation using `engine.clipping.active(mode)`
  - `getCurrentSectionMode()` - getter for current mode
  - `setSectionBoxRange(range)` - using `engine.clipping.updateClippingValue(range)`
  - `deactivateSection()` - unified deactivation using `engine.clipping.disActive()`

**Key Implementation Details**:
- `activeSection()` uses new underlying API: `this.engine.clipping.active(mode)`
- `setSectionBoxRange()` uses `updateClippingValue()` instead of old `sectionBox.setboxPercent()`
- SectionBoxRange type already imported from `../section-box-panel/types`
- Maintained existing comment style and section delimiters

**Verification**:
- TypeScript errors now ONLY in EngineManager (expected - Task 2 will fix)
- No errors in Engine component itself
- Ready for Task 2

**Line count reduction**: ~175 lines → ~38 lines (77% reduction in clipping code)

## [2026-02-02] Task 2 - EngineManager Refactoring Complete

**What was done**:
- Removed old methods:
  - `activateSectionAxis()`, `deactivateSectionAxis()`, `getCurrentSectionAxis()`
  - `activateSectionBox()`, `deactivateSectionBox()`
  - `fitSectionBoxToModel()`, `resetSectionBox()`
- Added new unified methods:
  - `activeSection(mode)` - delegates to `engineInstance.activeSection(mode)`
  - `getCurrentSectionMode()` - delegates to `engineInstance.getCurrentSectionMode()`
- Kept existing methods:
  - `deactivateSection()` - already present
  - `setSectionBoxRange()` - already present

**Line count reduction**: ~78 lines → ~27 lines (65% reduction)

**Next errors**: Now in Dialog Managers (Tasks 3, 4, 5) - as expected

## [2026-02-02] Tasks 3, 4, 5 - Dialog Managers Adaptation Complete

**Task 3 - SectionAxisDialogManager**:
- Changed `activateSectionAxis(axis)` → `activeSection(axis)` in onAxisChange callback
- Changed initial activation in onDialogCreated from `activateSectionAxis('x')` → `activeSection('x')`

**Task 4 - SectionBoxDialogManager**:
- Changed `activateSectionBox()` → `activeSection('box')` in onDialogCreated
- Replaced `fitSectionBoxToModel()` and `resetSectionBox()` with console.log (not supported)
- Kept `setSectionBoxRange()` callback (still works)

**Task 5 - SectionPlaneDialogManager**:
- Added `onDialogCreated()` lifecycle method with `activeSection('face')` call
- Added `onBeforeDestroy()` lifecycle method with `deactivateSection()` call
- Updated `onHide` callback to call `engine.clipping.disabled()` directly (temporary workaround)
- Kept `onReverse` and `onReset` as console.log only (not supported in new API)

**TypeScript Verification**: ✅ CLEAN - `npx tsc --noEmit` exit code 0

**Ready for**: Task 6 (Documentation)

## [2026-02-02] Task 6 - Documentation Update Complete

**Files updated**:
1. `docs/引擎API对接.md`:
   - Updated DialogManager examples to use `activeSection()` and `deactivateSection()`
   - Updated EngineManager API reference with new unified methods
   - Updated Engine component examples showing new API signatures
   - Removed references to deprecated methods (fitSectionBoxToModel, resetSectionBox)

2. `docs/API调用链.md`:
   - Updated axial clipping flow charts to show `activeSection('x'|'y'|'z')`
   - Updated section box flow charts to show `activeSection('box')`
   - Replaced axis lookup table with unified mode table (x, y, z, box, face)
   - Marked fitSectionBoxToModel and resetSectionBox as deprecated
   - Updated all API method references throughout

**Key changes in documentation**:
- Old: `activateSectionAxis(axis)` → New: `activeSection(axis)`
- Old: `activateSectionBox()` → New: `activeSection('box')`
- Old: `deactivateSectionAxis()` / `deactivateSectionBox()` → New: `deactivateSection()`
- Old: `getCurrentSectionAxis()` → New: `getCurrentSectionMode()`
- Old: `engine.clipping.sectionBox.setboxPercent()` → New: `engine.clipping.updateClippingValue()`

**Ready for**: Task 7 (Final Verification)

## [2026-02-02] Task 7 - Final Verification Complete

**Build Verification**: ✅ PASSED
```
npm run build
✓ TypeScript compilation successful
✓ Vite build successful (5.59s)
✓ Output: dist/iflow-engine.es.js (2,059.34 kB)
✓ Output: dist/iflow-engine.umd.js (1,359.09 kB)
```

**Source Code Verification**: ✅ CLEAN
- Searched entire `src/` directory for old API references
- Result: NO occurrences of:
  - `activateSectionAxis`
  - `activateSectionBox`
  - `deactivateSectionAxis`
  - `deactivateSectionBox`
  - `fitSectionBoxToModel`
  - `resetSectionBox`
  - `getCurrentSectionAxis`

**TypeScript Verification**: ✅ PASSED
- `npx tsc --noEmit` exit code: 0
- No TypeScript errors in any file

**Migration Summary**:
| Component | Old API Lines | New API Lines | Reduction |
|-----------|---------------|---------------|-----------|
| Engine | ~175 | ~38 | 78% |
| EngineManager | ~78 | ~27 | 65% |
| SectionAxisDialogManager | Modified 2 locations | - | - |
| SectionBoxDialogManager | Modified 3 locations | - | - |
| SectionPlaneDialogManager | Added 2 lifecycle methods | - | - |

**Total Impact**:
- Files modified: 5 code files + 2 documentation files
- Lines removed: ~253 lines of old clipping code
- Lines added: ~65 lines of new unified API
- Net reduction: ~188 lines (74% code reduction in clipping functionality)

**ALL TASKS COMPLETE** ✅

## [2026-02-02] PLAN COMPLETION - All 20 Checkboxes Verified

**Status**: ✅ 20/20 COMPLETE (100%)

**Breakdown**:
- 7 main tasks (Tasks 1-7): COMPLETE
- 5 Definition of Done criteria: VERIFIED
- 8 Final Checklist items: VERIFIED

**Evidence**:
- Build successful: `npm run build` ✅
- TypeScript clean: `npx tsc --noEmit` exit 0 ✅
- No old API references: grep search clean ✅
- Documentation updated: 2 files modified ✅
- Code committed: 4 atomic commits ✅

**Outcome**: Clipping API migration is 100% complete and verified.