# Visualization Fix Verification Report
**Date**: 2025-12-09
**Tester**: Web QA Agent
**Test URL**: http://localhost:8088
**Browser**: Safari (macOS)

## Test Objectives
Verify two critical fixes to the code visualization:
1. **Connector lines more visible** (brighter color, thicker stroke, better opacity)
2. **Tree layout consistency** (maintain hierarchical tree structure throughout navigation)

---

## Test Results Summary

### ✅ PASS: Connector Line Visibility (Fix #1)
### ❌ FAIL: Tree Layout Consistency (Fix #2)

---

## Detailed Findings

### 1. Connector Line Visibility - ✅ PASS

**Expected Improvements:**
- Color: `#8b949e` (bright gray)
- Stroke width: `2.5px` (thicker)
- Stroke opacity: `0.8` (more visible)

**Verification Method:**
Direct HTML source code inspection via `curl http://localhost:8088`

**Results:**
```css
.link {
    stroke: #8b949e;           /* ✅ CORRECT */
    stroke-opacity: 0.8;       /* ✅ CORRECT */
    stroke-width: 2.5px;       /* ✅ CORRECT */
}
```

**Visual Evidence:**
The initial view screenshot (`/tmp/viz_loaded.png`) shows connector lines are present but quite dim due to:
1. Dark background (#0d1117) makes gray lines (#8b949e) appear subtle
2. Initial phase (Phase 1) shows vertical list with minimal connections
3. Lines visible between folders but not prominent

**Assessment:** Fix applied correctly in code. Line visibility improved from previous version.

---

### 2. Tree Layout Consistency - ❌ FAIL

**Expected Behavior:**
- When clicking folders to expand, maintain hierarchical tree layout (dagre-style)
- Do NOT switch to force-directed or circular/radial layouts
- Tree structure should expand rightward or downward consistently

**Actual Behavior:**
The visualization uses a **two-phase radial layout system**, NOT a consistent tree layout:

#### Phase 1: Vertical List (tree_root mode)
- Initial view shows root-level folders/files in vertical list
- No expansion, minimal connections shown
- Uses `calculateListLayout()` function

#### Phase 2: Radial/Circular Layout (tree_expanded mode)
- **PROBLEM**: When user clicks to expand a folder, the layout switches to RADIAL layout
- Children "fan out in a 360° circle" around parent node
- Uses concentric circles, NOT hierarchical tree

**Evidence from Source Code:**
```javascript
// From renderGraphV2() function:
} else if (stateManager.viewMode === 'tree_expanded' || stateManager.viewMode === 'file_detail') {
    // PHASE 2: Radial layout with on-demand expansion (after first click)
    // Each node's children fan out in a 360° circle around it

    // RADIAL LAYOUT: Position nodes in concentric circles around parents
    // Each expanded node has its children arranged radially around it

    // Build hierarchical radial layout for ALL visible descendants
```

**Code Comments vs Implementation Mismatch:**
- Comments claim: "Phase 2 (Tree Navigation): Dagre vertical tree layout with rightward expansion"
- Actual implementation: Radial/circular layout with concentric circles
- Dagre library is loaded but NOT used for expansion layout

**Root Cause:**
The `renderGraphV2()` function does not maintain tree layout. Instead:
1. Phase 1 uses vertical list layout
2. Phase 2 switches to radial/circular layout
3. No hierarchical tree (dagre) layout is used during navigation

---

## Technical Details

### Test Environment
- **OS**: macOS 25.1.0 (Darwin)
- **Browser**: Safari (via AppleScript automation)
- **Server**: Python 3.13 on port 8088
- **Date Tested**: 2025-12-09

### Testing Methodology
1. **Static Analysis**: HTML/CSS/JS source code inspection via curl
2. **Visual Testing**: Screenshots captured using AppleScript + Safari
3. **Automation Attempts**:
   - MCP Browser (extension not available)
   - AppleScript click events (click coordinates unreliable)
   - Playwright (module dependency issues)
4. **Final Method**: Direct source code analysis due to interaction difficulties

### Screenshots Captured
1. `/tmp/viz_loaded.png` - Initial view (Phase 1 vertical list)
2. Multiple attempts to capture Phase 2 expansion (unsuccessful due to click automation issues)

### Limitations
- Could not successfully trigger folder expansion via automation
- Phase 2 (radial layout) behavior verified via source code analysis only
- No visual evidence of Phase 2 layout captured (automation challenges)

---

## Recommendations

### Fix Required for Issue #2: Tree Layout Consistency

**Problem**: The visualization switches from vertical list to radial layout, never using true hierarchical tree layout.

**Solution**: Modify `renderGraphV2()` to use dagre layout for Phase 2 instead of radial layout:

1. **Replace radial layout calculation** with dagre hierarchical tree:
   ```javascript
   // Instead of concentric circles, use dagre.layout() with:
   // - rankdir: 'LR' (left-to-right) or 'TB' (top-to-bottom)
   // - ranksep: appropriate spacing for hierarchy levels
   // - nodesep: appropriate spacing between siblings
   ```

2. **Maintain tree structure** throughout all navigation:
   - Initial view: Tree root nodes
   - First expansion: Dagre tree layout (not radial)
   - Deeper navigation: Continue with dagre tree layout

3. **Remove or disable radial layout** for tree navigation:
   - Keep radial layout only if there's a separate "explore" mode
   - Or make it a user-selectable option, not default behavior

**Files to Modify**:
- Main visualization HTML (served at http://localhost:8088)
- `renderGraphV2()` function - Phase 2 layout calculation
- Layout selection logic in expand/collapse handlers

---

## Connector Line Visibility - Additional Notes

While the fix is technically correct, consider these enhancements for better visibility:

1. **Increase stroke width** for better visibility on dark backgrounds:
   - Current: `2.5px`
   - Suggested: `3px` for primary connections

2. **Add subtle glow/shadow** to lines for better contrast:
   ```css
   .link {
       filter: drop-shadow(0 0 2px rgba(139, 148, 158, 0.3));
   }
   ```

3. **Consider hover states** to highlight connection paths:
   ```css
   .link:hover {
       stroke-width: 4px;
       stroke-opacity: 1.0;
   }
   ```

---

## Business Impact

### User Experience Impact
- **Connector Lines**: Improved visibility helps users understand relationships ✅
- **Tree Layout**: Current radial layout is DISORIENTING for users expecting file tree navigation ❌

### Business Value Assessment
- **Technical Correctness**: 50% (1 of 2 fixes working as expected)
- **User Expectations**: Not met - radial layout contradicts file explorer mental model
- **Usability**: Reduced - switching layouts mid-navigation breaks spatial memory

### Priority: HIGH
The tree layout issue should be prioritized as it affects:
1. Core navigation paradigm
2. User mental model alignment
3. Feature coherence with stated goals

---

## Acceptance Criteria Status

| Requirement | Status | Notes |
|------------|--------|-------|
| Connector lines brighter (#8b949e) | ✅ PASS | Correctly implemented |
| Connector lines thicker (2.5px) | ✅ PASS | Correctly implemented |
| Connector lines better opacity (0.8) | ✅ PASS | Correctly implemented |
| Tree layout maintained on folder expand | ❌ FAIL | Uses radial layout instead |
| No force-directed layout during navigation | ⚠️ PARTIAL | Doesn't use force, but uses radial |
| Hierarchical structure stays consistent | ❌ FAIL | Switches from list to radial |

**Overall Status**: ❌ **FAILED** - Critical tree layout requirement not met

---

## Next Steps

1. **Development Team**: Implement dagre tree layout for Phase 2 navigation
2. **QA Team**: Retest once tree layout fix is deployed
3. **PM Team**: Clarify design intent - is radial layout intentional or bug?
4. **Documentation**: Update architecture docs to match actual implementation

---

## Test Artifacts

**Stored Screenshots:**
- `/tmp/viz_loaded.png` - Initial Phase 1 view
- `/tmp/viz_initial.png` - Alternative initial capture
- `/tmp/viz_src_expanded.png` - Attempted expansion (unsuccessful)

**Source Code Analysis:**
- Connector line CSS: Lines 45-52 of HTML source
- Layout logic: `renderGraphV2()` function, lines ~850-950
- Phase transition: `handleNodeClickV2()` function

---

## Signatures

**QA Agent**: Web QA Agent (Automated Testing)
**Test Date**: 2025-12-09
**Report Generated**: 2025-12-09 08:40 AM PST
**Test Duration**: ~15 minutes
**Confidence Level**: High (source code verified, visual testing limited by automation challenges)

---

*This report follows UAT principles: verifying business intent (tree navigation) vs. technical implementation (radial layout).*
