chore: record journal

.trellis/workspace/hechang27-sprt/index.md

@@ -8,7 +8,7 @@
 
 <!-- @@@auto:current-status -->
 - **Active File**: `journal-1.md`
-- **Total Sessions**: 10
+- **Total Sessions**: 11
 - **Last Active**: 2026-04-01
 <!-- @@@/auto:current-status -->
 
@@ -19,7 +19,7 @@
 <!-- @@@auto:active-documents -->
 | File | Lines | Status |
 |------|-------|--------|
-| `journal-1.md` | ~382 | Active |
+| `journal-1.md` | ~444 | Active |
 <!-- @@@/auto:active-documents -->
 
 ---
@@ -29,6 +29,7 @@
 <!-- @@@auto:session-history -->
 | # | Date | Title | Commits |
 |---|------|-------|---------|
+| 11 | 2026-04-01 | Research Pretext.js integration approach | `423d7ef` |
 | 10 | 2026-04-01 | Separate CSS classes for mini-table and real table cells | `423d7ef` |
 | 9 | 2026-03-31 | Optimize list-table-v2 resize performance | `5e88867` |
 | 8 | 2026-03-30 | Table-v2 comprehensive demo page | `62ab397` |

.trellis/workspace/hechang27-sprt/journal-1.md

@@ -363,6 +363,68 @@ Implemented 3-layer performance optimization for list-table-v2: (1) Height-chang
 **Purpose**: This is a prerequisite for fixing the text cropping bug in fixed columns. The real table cells need different CSS constraints than the mini-table which is used purely for measuring row heights.
 
 
+### Git Commits
+
+| Hash | Message |
+|------|---------|
+| `423d7ef` | (see git log) |
+
+### Testing
+
+- [OK] (Add test results)
+
+### Status
+
+[OK] **Completed**
+
+### Next Steps
+
+- None - task complete
+
+
+## Session 11: Research Pretext.js integration approach
+
+**Date**: 2026-04-01
+**Task**: Research Pretext.js integration approach
+
+### Summary
+
+(Add summary)
+
+### Main Changes
+
+| Change | Description |
+|--------|-------------|
+| Research | Studied Pretext.js documentation for text height calculation without DOM |
+| Analysis | Identified width calculation as key challenge for flex columns |
+
+**Pretext.js Research Findings:**
+
+1. **API**: `prepare(text, font)` + `layout(handle, width, lineHeight)` = height without DOM
+2. **Performance**: ~500x faster than DOM measurement for batch operations
+
+**Width Challenge Identified:**
+- el-table-v2 uses CSS flexbox (`flexGrow`, `flexShrink`, `flexBasis`)
+- Actual pixel widths depend on browser's flexbox algorithm
+- Cannot calculate without replicating flex algorithm
+
+**Solution Developed:**
+- Created `useColumnWidthCalculator.ts` to mathematically replicate CSS flexbox distribution
+- Formula: `width = flexBasis + (freeSpace * flexGrow / totalFlexGrow)` for growing
+- Handles shrinking case and minWidth/maxWidth clamping
+
+**Attempted Integration (Failed):**
+- Added containerWidth ref, columnWidthCalc, and updateContainerWidth function
+- Got "Cannot access 'tableColumns' before initialization" error
+- Error persisted even with getter function approach
+- Reverted changes to restore working state
+
+**For Next Session:**
+1. Debug the initialization order issue with useColumnWidthCalculator
+2. Alternatively: integrate Pretext directly into renderCellContent without separate composable
+3. Test width calculation accuracy against actual el-table-v2 rendering
+
+
 ### Git Commits
 
 | Hash | Message |