Migrate LogView.vue to PlatformServiceMixin with architectural compliance

Achieve total architectural compliance by eliminating both legacy database
utilities and direct SQL queries from LogView.vue component.

**Component Changes (LogView.vue):**
- Replace databaseUtil.memoryLogs with this.$memoryLogs
- Replace direct SQL query with this.$logs() abstraction
- Remove PlatformServiceFactory and databaseUtil imports
- Add PlatformServiceMixin to component mixins
- Reduce component from database-aware to pure presentation layer

**Mixin Enhancements (PlatformServiceMixin.ts):**
- Add $memoryLogs computed property for memory logs access
- Add $logs() method for abstracted database log retrieval
- Update TypeScript interfaces (IPlatformServiceMixin, ComponentCustomProperties)
- Enable components to access logs without SQL knowledge

**Documentation:**
- Add docs/migration-testing/TESTING_LOGVIEW.md - Quick testing guide
- Add docs/migration-testing/migration-checklist-LogView.md - Comprehensive checklist
- Document architectural compliance achievements and testing requirements

**Architectural Benefits:**
- Zero databaseUtil imports in LogView.vue
- Zero direct SQL queries in component layer
- Proper separation of concerns (View → Service → Database)
- Reusable $logs() method for other components
- Sets gold standard for future migrations

**Migration Progress:**
- Components using PlatformServiceMixin: 14/91 (15%)
- LogView.vue achieves total architectural compliance
- Reduces legacy databaseUtil imports from 52 to 51

**Testing:** Ready for testing at /logs route
**Backwards Compatible:** Yes - no functional changes to end users

docs/migration-testing/TESTING_LOGVIEW.md

@@ -0,0 +1,67 @@
+# LogView.vue Migration Testing Guide
+
+## Quick Test (2025-07-06)
+
+### Migration Summary
+- **Component**: LogView.vue (110 lines)
+- **Migration Type**: Database operations + Mixin Enhancement + Architecture Improvement
+- **Total Compliance**: ✅ **ACHIEVED** - Zero databaseUtil imports + Zero direct SQL queries
+- **Changes Made**:
+  - **Enhanced PlatformServiceMixin**: Added `$memoryLogs` computed property
+  - **Enhanced PlatformServiceMixin**: Added `$logs()` method for abstracted log retrieval
+  - **Replaced**: `databaseUtil.memoryLogs` with `this.$memoryLogs`
+  - **Replaced**: Direct SQL query with `this.$logs()` abstraction
+  - **Eliminated**: All direct databaseUtil imports and SQL queries
+
+### Architectural Improvement
+🏗️ **No More Direct SQL in Components**: LogView.vue now uses `this.$logs()` instead of raw SQL queries, following proper layered architecture principles.
+
+### Test URL
+```
+http://localhost:3000/logs
+```
+
+### Expected Behavior
+1. **Loading State**: Should show spinner while loading
+2. **Memory Logs Section**: Should display memory logs at bottom (via `this.$memoryLogs`)
+3. **Database Logs**: Should display logs from database in reverse chronological order (via `this.$logs()`)
+4. **Error Handling**: Should show error message if database query fails
+
+### Test Steps
+1. Navigate to `/logs`
+2. Verify page loads without errors
+3. Check that memory logs are displayed at bottom
+4. Verify database logs are shown (if any exist)
+5. Check browser console for any errors
+
+### Success Criteria
+- ✅ Page loads successfully
+- ✅ Memory logs section appears (populated from `this.$memoryLogs`)
+- ✅ Database logs load without errors (retrieved via `this.$logs()`)
+- ✅ No TypeScript/JavaScript errors in console
+- ✅ UI matches expected behavior
+- ✅ **Total Compliance**: No databaseUtil imports remaining
+- ✅ **Architectural Compliance**: No direct SQL queries in component
+
+### Migration Details
+- **File**: `src/views/LogView.vue`
+- **Lines Changed**: 4 lines (imports, method calls)
+- **Backwards Compatible**: Yes
+- **Database Operations**: Pure PlatformServiceMixin (`$logs`, `$memoryLogs`)
+- **Mixin Enhancement**: Added `$memoryLogs` computed property + `$logs()` method
+
+### Mixin Enhancement
+**NEW**: Enhanced PlatformServiceMixin with:
+```typescript
+// Added to PlatformServiceMixin computed properties
+$memoryLogs(): string[] {
+  return memoryLogs;
+}
+
+// Added to PlatformServiceMixin methods
+async $logs(): Promise<Array<Record<string, unknown>>> {
+  return await this.$query("SELECT * FROM logs ORDER BY date DESC");
+}
+```
+
+This enables **total architectural compliance** - components no longer need databaseUtil imports OR direct SQL queries.