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

# Journal - hechang27-sprt (Part 1)

> AI development session journal
> Started: 2026-03-24

---



## Session 1: Bootstrap coding specs with CC + Codex pipeline

**Date**: 2026-03-24
**Task**: Bootstrap coding specs with CC + Codex pipeline

### Summary

Bootstrap session completed all 8 tasks: (1) Bootstrap Guidelines - set up Trellis framework with Claude Code hooks and multi-agent pipeline, (2) All 7 spec-filling tasks completed - plugs/composables (7 composables), plugs/api (9 modules), plugs/element (4 docs), plugs/http (4 docs), packages/base (18 components), packages/manage (views/head/common), plugs/config+store+i18n (7 docs). All specs contain real code examples with file paths, anti-patterns documented, no placeholder text.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `785e6b2` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 2: Create list-table-v2.vue with el-table-v2

**Date**: 2026-03-25
**Task**: Create list-table-v2.vue with el-table-v2

### Summary

Implemented list-table-v2.vue using Element Plus el-table-v2 with virtual scrolling. Key findings: (1) el-table-v2 requires ElAutoResizer wrapper for auto-sizing, (2) slot-to-cellRenderer conversion via renderSlot, (3) fixed import path issue in useListTable.ts and plugs/store/index.ts. Updated component-guidelines.md with el-table-v2 usage notes. Added demo page at examples/view/base/table-v2.vue with 100 rows of test data.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `2a2bba8` | (see git log) |
| `1024bb1` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 3: Add viewport resize handling for list-table-v2

**Date**: 2026-03-26
**Task**: Add viewport resize handling for list-table-v2

### Summary

Implemented debounced window resize handler (250ms) to re-measure probe row height when viewport changes. Only active in dynamic height mode (when rowHeight is undefined). Properly cleans up on unmount. Fixed TypeScript typing for lodash debounce cancel method.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `96fef48` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 4: list-table-v2 mini table for row height with ResizeObserver

**Date**: 2026-03-26
**Task**: list-table-v2 mini table for row height with ResizeObserver

### Summary

Implemented hidden mini table approach for dynamic row height measurement in list-table-v2. Key improvements: (1) Replaced window resize with ResizeObserver on container to prevent flickering, (2) Mini table uses 3-5 sample rows with same JSX rendering as real table (slots, TzDateTime, dicts), (3) Header rendering added with dynamic header height measurement, (4) Extracted shared renderCellContent function to avoid code duplication, (5) Fixed header text wrapping to allow multi-line headers

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `bd47429` | (see git log) |
| `c9f8832` | (see git log) |
| `e72f42a` | (see git log) |
| `1fe3718` | (see git log) |
| `ed00f0b` | (see git log) |
| `854a8f6` | (see git log) |
| `242f376` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 5: Fix table-v2 resize flicker with queueMicrotask pattern

**Date**: 2026-03-26
**Task**: Fix table-v2 resize flicker with queueMicrotask pattern

### Summary

Fixed 1-2 frame flash during window resize by using queueMicrotask to minimize gap between clearing and setting estimatedRowHeight. Also documented build commands and rename propagation gotcha in spec guides.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `179aafe` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 6: Expose cellRenderer and headerCellRenderer for list-table-v2

**Date**: 2026-03-27
**Task**: Expose cellRenderer and headerCellRenderer for list-table-v2

### Summary

Added cellRenderer and headerCellRenderer column attributes to list-table-v2. Fixed mini-table VNode rendering using functional components. Fixed CSS for accurate row height measurement. Added ts-pattern dependency.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `3c97cd7` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 7: Restructure and cleanup list-table-v2 mini-table rendering

**Date**: 2026-03-28
**Task**: Restructure and cleanup list-table-v2 mini-table rendering

### Summary

Refactored mini-table rendering to use useTemplateRef, added debug display for height estimation, fixed md5 import bug, and fixed loading state bug in router getUser callback

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `a2eeb86` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 8: Table-v2 comprehensive demo page

**Date**: 2026-03-30
**Task**: Table-v2 comprehensive demo page

### Summary

(Add summary)

### Main Changes

## Session Summary

Reworked `examples/view/base/table-v2.vue` into a comprehensive demo page for `list-table-v2`, patterned after Element Plus documentation style.

### Features Implemented

| # | Section | Features Tested |
|---|---------|----------------|
| 1 | Basic Usage | Data binding, columns, pagination, @query/@row-click/@cell-click events |
| 2 | Styling | border prop, align (left/center/right) |
| 3 | Fixed Columns | fixed: "left"/"right" |
| 4 | Data Formatting | timestamp: "unix", filesize: true, dict |
| 5 | Custom Cell Renderer | cellRenderer JSX function |
| 6 | Custom Header Renderer | headerCellRenderer JSX function |
| 7 | Dynamic Height | Auto-probe (no rowHeight), ResizeObserver, debug |
| 8 | Fixed Height Mode | rowHeight: 60 (disables probe) |
| 9 | Column Width | width, minWidth |
| 10 | Dimensions | height, maxHeight, headerHeight |
| 11 | Slot Cells | slot: true + #columnKey template |
| 12 | i18n Support | i18n key with vue3-i18n |
| 13 | Combined Test | All features together stress test |
| 14 | Renderer Edge Cases | cellRenderer + fixed + pagination |

### Bug Fixes

- Fixed `headerCellRenderer` shorthand property error (was using wrong variable name)
- Added missing `toggleMaxHeight` function
- Fixed data format: `page="false"` tables need plain arrays, not `{data, total}` objects
- Fixed `.app-main` overflow to enable page scrolling

### Updated Files
- `examples/view/base/table-v2.vue` - Demo page (14 sections, ~1000 lines)
- `packages/manage/router/index.vue` - Changed overflow: hidden → overflow-y: auto

### Verification
- Build passes: bun run build ✓
- TypeScript passes: tsc --noEmit ✓  
- Browser tested: All 14 tables render data correctly, no JS errors


### Git Commits

| Hash | Message |
|------|---------|
| `62ab397` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 9: Optimize list-table-v2 resize performance

**Date**: 2026-03-31
**Task**: Optimize list-table-v2 resize performance

### Summary

Implemented 3-layer performance optimization for list-table-v2: (1) Height-change detection - only re-probe when mini-table height actually changes, (2) Viewport-based observer detachment - ResizeObserver only attached when table is visible, (3) Display:none for off-screen tables - removes hidden mini-tables from GPU layout. Also added oxlint as linter.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `5e88867` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 10: Separate CSS classes for mini-table and real table cells

**Date**: 2026-04-01
**Task**: Separate CSS classes for mini-table and real table cells

### Summary

(Add summary)

### Main Changes

| Change | Description |
|--------|-------------|
| Refactor | Separated CSS classes for mini-table (height measurement) vs real table (el-table-v2) cell rendering |

**Changes Made**:
- `packages/base/data/list-table-v2.vue`: Added `isMiniTable` parameter to `renderCellContent` and `renderHeaderCellContent` to distinguish rendering context
- Mini-table cells use `mini-cell-text` / `mini-header-cell-text` (unchanged - allows natural growth for height measurement)
- Real table cells use new `table-cell-text` / `table-header-cell-text` classes (with `overflow: hidden; text-overflow: ellipsis`)

**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 |
|------|---------|
| `423d7ef` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 12: Pretext integration exploration - virtual table issues

**Date**: 2026-04-02
**Task**: Pretext integration exploration - virtual table issues

### Summary

(Add summary)

### Main Changes

## Session Summary

Attempted to integrate Pretext.js into `list-table-v2.vue` for synchronous row height calculation without DOM reflow.

## What Was Done

1. **Created `useColumnWidthCalculator.ts`** - Composable that mathematically replicates CSS flexbox column width distribution for el-table-v2

2. **Created `usePretextHeight.ts`** - Composable for calculating text heights using Pretext.js with caching

3. **Attempted VirtualTable approach** - Created a functional JSX component inside list-table-v2 that:
   - Receives width directly from `el-auto-resizer` slot props
   - Calculates `estimatedRowHeight` using Pretext synchronously during render
   - Uses `toRaw()` to break reactive chains and avoid recursion

4. **Issues encountered**:
   - **Recursion error**: `onItemRendered` callback in el-table-v2 was triggering reactive loops
   - **Fixed by** removing nested `computed` and using `toRaw()`
   - **Virtual row count bug**: el-table-v2 only rendered 3 rows instead of ~10 with estimatedRowHeight set
   - The VirtualTable approach caused el-table-v2's DynamicSizeGrid to miscalculate the virtual scroll window

5. **Root cause**: el-table-v2's DynamicSizeGrid uses `estimatedRowHeight` to calculate how many rows to render in the viewport. With actual rows at 28px but estimated heights causing miscalculations, the virtual scroller wasn't showing all rows.

6. **Reverted changes**: Reverted list-table-v2.vue to original code since the VirtualTable approach wasn't working correctly.

## Key Files Created

- `packages/base/data/useColumnWidthCalculator.ts` - Flex column width calculator
- `packages/base/data/usePretextHeight.ts` - Pretext height calculator composable

## Lessons Learned

1. el-table-v2's virtual scrolling is sensitive to `estimatedRowHeight` accuracy
2. CSS variables don't work in Canvas (Pretext) context - must use plain font specs
3. Reactive loops can occur when el-table-v2 callbacks trigger Vue reactivity
4. `toRaw()` helps break reactivity but isn't a complete solution
5. The original mini-table DOM measurement approach works correctly (10 rows showing)

## Next Steps

- Investigate why el-table-v2's DynamicSizeGrid miscalculates with Pretext-estimated heights
- Consider using Pretext only for initial estimate, then relying on mini-table for refinement
- Or find a different integration point that doesn't conflict with el-table-v2's internal calculations


### Git Commits

| Hash | Message |
|------|---------|
| `0764ee2` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 13: Attempt Pretext row height estimation for el-table-v2

**Date**: 2026-04-02
**Task**: Attempt Pretext row height estimation for el-table-v2

### Summary

Tried to integrate Pretext.js for DOM-less row height estimation. Key finding: el-table-v2 caches row heights internally and only re-measures when rows scroll into view. The estimatedRowHeight prop doesn't trigger re-render of existing rows. The table's virtualization cache persists even when destroying/recreating the component. This approach needs more investigation - possibly requiring deeper integration with el-table-v2's internal measurement system or using the table's built-in dynamic height mechanism differently.

### Main Changes



### Git Commits

| Hash | Message |
|------|---------|
| `stashed` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 14: Fix list-table-v2 fixed column cropping and horizontal scroll

**Date**: 2026-04-02
**Task**: Fix list-table-v2 fixed column cropping and horizontal scroll

### Summary

Fixed list-table-v2 issues:

1. Fixed columns were cropped even with width:120 - el-table-v2 needed table-level fixed=true prop
2. Added hasFixedColumns computed to detect fixed columns and pass :fixed to el-table-v2
3. Fixed column width logic: fixed columns without explicit width now use minWidth as width WITHOUT flexGrow (flexGrow caused cropping in el-table-v2's internal fixed sub-table layout)
4. Non-fixed columns keep flexGrow:1 for auto-distribution
5. Horizontal scrolling for non-fixed tables with flexGrow is mutually exclusive - flexGrow fills space, preventing overflow

### Main Changes



### Git Commits

(No commits - planning session)

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 15: Rebuild list-table-v2: Scaffold hooks and types

**Date**: 2026-04-03
**Task**: Rebuild list-table-v2: Scaffold hooks and types

### Summary

Scaffolded list-table-v2 hooks for pretext-based virtualized table. PR1 complete: hooks + types created.

### Main Changes

## What was done

**Research**: Explored pretext-table (ShipItAndPray) and virtual-table (aimerthyr) implementations. pretext-table uses custom prefix-sum virtualizer + pretext text measurement (no TanStack Virtual).

**PRD Created**: Full requirements documented:
- Custom prefix-sum virtualizer (pretext-table style, lightweight)
- @chenglou/pretext for text measurement
- Variance-based flexGrow/flexShrink from sampled data
- Runtime augmentation for custom cellRenderers
- Cell renderers return plain VNode or {vnode, minHeight, minWidth}

## PR1: Scaffold ✅ COMPLETE

```
packages/base/data/list-table-v2/
├── index.ts                      # Exports all hooks and types
├── types.ts                      # ListTableColumn<T>, ListTableProps, etc.
├── measureText.ts                # Cached pretext measurement
├── usePretextColumnWidths.ts    # Variance-based flex params
├── usePretextRowHeights.ts       # Pre-computed row heights
├── useVirtualRows.ts            # Prefix-sum + binary search virtualizer
└── useRuntimeHeightAugment.ts # ResizeObserver + running average
```

## Key Design Decisions

1. **prepareWithSegments() caching**: Using prepareWithSegments for everything since it's the superset type that works with both layout() and walkLineRanges(). Cache is LRU-capped at 10,000 entries.

2. **walkLineRanges for shrink-wrap**: Using walkLineRanges with large maxWidth to find widest line — handles embedded \n correctly and avoids binary search.

3. **Variance formula**: varianceScore = min(1, σ / (μ * 0.5)); flexGrow/flexShrink = 0.1 + varianceScore * 1.9

## Remaining PRs

| PR | Goal |
|----|------|
| PR2 | Wire hooks into Vue component, flex container, virtual scrolling |
| PR3 | cellRenderer {vnode, minHeight} return type, ResizeObserver augmentation |
| PR4 | Fixed columns, pagination, slots, polish |


### Git Commits

| Hash | Message |
|------|---------|
| `0f72b83` | (see git log) |
| `87000d8` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 16: Debug list-table-v2 virtual scrolling issues

**Date**: 2026-04-03
**Task**: Debug list-table-v2 virtual scrolling issues

### Summary

Fixed Vue 3 template ref auto-unwrap issue by destructuring visibleRows from virtualizer. Discovered that overscan=5 with small datasets (10 rows) means all rows render regardless of scroll - not a bug. Text wrapping, height constraint, and TypeScript errors also fixed.

### Main Changes



### Git Commits

(No commits - planning session)

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete


## Session 17: ListTableV2 flex-fill investigation

**Date**: 2026-04-08
**Task**: ListTableV2 flex-fill investigation
**Branch**: `dev`

### Summary

(Add summary)

### Main Changes

| Area | Progress |
|------|----------|
| Width filling bug | Investigated live `ListTableV2` layout with agent-browser and confirmed cells were not consuming the full row width even when computed auto flex factors were >1. |
| Runtime fix | Updated the nested `packages/base/data/list-table-v2/list-table-v2.vue` implementation so explicit-width columns render with fixed `flex: 0 0 width`, while auto-width columns apply inline `flexGrow`/`flexShrink`/`flexBasis` styles to the actual rendered header and body cells. |
| Flex derivation | Adjusted auto-derived flex factors in `packages/base/data/list-table-v2/usePretextColumnWidths.ts` so generated values stay above `1`. |
| Validation | Verified on `http://localhost:5173/#/table-v2` that the section-9 row gap dropped from a non-zero trailing gap to `0`, with row cell widths summing to the full row width. |
| Spec sync | Updated frontend component guidelines and example-page copy to match the current auto-flex behavior. |

**Updated Files**:
- `.trellis/spec/frontend/component-guidelines.md`
- `examples/view/base/table-v2.vue`
- `packages/base/data/list-table-v2/list-table-v2.vue`
- `packages/base/data/list-table-v2/usePretextColumnWidths.ts`
- `AGENTS.md`
- `CLAUDE.md`

**Status**:
- Active task `04-03-list-table-v2-tanstack-pretext` remains open; this session records progress only and does not archive the task.


### Git Commits

| Hash | Message |
|------|---------|
| `6e18451033fcf4e6c9cf4ed3f2521c39b86cf2c5` | (see git log) |

### Testing

- [OK] (Add test results)

### Status

[OK] **Completed**

### Next Steps

- None - task complete