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frontend/docs/tanstack-table-row-selection-verification.md

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+# TanStack Table Row Selection Verification
+
+## Comparison with Official Example
+
+This document verifies that our TasksDataTable implementation follows TanStack Table best practices by comparing it with the official row selection example.
+
+**Reference:** https://github.com/TanStack/table/blob/main/examples/vue/row-selection/src/App.vue
+
+## Key Implementation Points
+
+### ✅ 1. Row Selection State Management
+
+**Official Example:**
+```typescript
+const rowSelection = ref<RowSelectionState>({})
+
+const table = useVueTable({
+  state: {
+    get rowSelection() {
+      return rowSelection.value
+    },
+  },
+  onRowSelectionChange: updateOrValue => {
+    rowSelection.value =
+      typeof updateOrValue === 'function'
+        ? updateOrValue(rowSelection.value)
+        : updateOrValue
+  },
+})
+```
+
+**Our Implementation:**
+```typescript
+const rowSelection = ref<RowSelectionState>({})
+
+const table = useVueTable({
+  state: {
+    get rowSelection() {
+      return rowSelection.value
+    },
+  },
+  onRowSelectionChange: (updaterOrValue) => {
+    rowSelection.value =
+      typeof updaterOrValue === 'function'
+        ? updaterOrValue(rowSelection.value)
+        : updaterOrValue
+  },
+})
+```
+
+**Status:** ✅ Identical implementation
+
+### ✅ 2. Enable Row Selection
+
+**Official Example:**
+```typescript
+enableRowSelection: true
+```
+
+**Our Implementation:**
+```typescript
+enableRowSelection: true,
+getRowId: (row) => String(row.id),
+```
+
+**Status:** ✅ Correct - We additionally specify `getRowId` to use task IDs as row identifiers
+
+### ✅ 3. Select All Checkbox
+
+**Official Example:**
+```typescript
+header: ({ table }) => {
+  return (
+    <IndeterminateCheckbox
+      checked={table.getIsAllRowsSelected()}
+      indeterminate={table.getIsSomeRowsSelected()}
+      onChange={table.getToggleAllRowsSelectedHandler()}
+    />
+  )
+}
+```
+
+**Our Implementation:**
+```typescript
+header: ({ table }) => {
+  const isAllSelected = table.getIsAllPageRowsSelected()
+  const isSomeSelected = table.getIsSomePageRowsSelected()
+  
+  return h(Checkbox, {
+    checked: isAllSelected ? true : isSomeSelected ? 'indeterminate' : false,
+    'onUpdate:checked': (value: boolean | 'indeterminate') => {
+      table.toggleAllPageRowsSelected(value === true)
+    },
+    ariaLabel: 'Select all',
+  })
+}
+```
+
+**Status:** ✅ Correct - We use `getIsAllPageRowsSelected()` which is appropriate for our use case (filtered/paginated data)
+
+### ✅ 4. Row Selection Watcher
+
+**Our Implementation (Additional Feature):**
+```typescript
+watch(
+  rowSelection,
+  (newSelection) => {
+    const selectedIds = Object.keys(newSelection)
+      .filter(key => newSelection[key])
+      .map(key => parseInt(key))
+    emit('selection-change', selectedIds)
+  },
+  { deep: true }
+)
+```
+
+**Status:** ✅ This is a custom enhancement to emit selection changes to the parent component
+
+## Design Differences (Intentional)
+
+### 1. Row Checkboxes
+
+**Official Example:** Shows checkboxes in each row cell
+**Our Implementation:** No checkboxes in row cells - selection via row clicks
+
+**Reason:** Our design uses click-based selection (single click, Ctrl+click, Shift+click) instead of checkboxes in each row. This provides a more streamlined UI and follows common file manager selection patterns.
+
+### 2. Custom Click Handlers
+
+**Our Implementation:** Custom click handlers for:
+- Single click: Select only clicked row
+- Ctrl/Cmd+click: Toggle selection
+- Shift+click: Range selection
+- Right-click: Context menu with selection preservation
+
+**Status:** ✅ This is intentional and follows the requirements in the design document
+
+## Conclusion
+
+Our TasksDataTable implementation correctly follows TanStack Table best practices for row selection. The differences from the official example are intentional design choices that:
+
+1. Use click-based selection instead of row checkboxes
+2. Emit selection changes to parent component
+3. Support advanced selection patterns (range, toggle, context menu)
+4. Use `getIsAllPageRowsSelected()` for filtered data
+
+All TypeScript types are correct, and there are no diagnostic errors.
+
+**Verification Date:** 2025-11-26
+**Status:** ✅ VERIFIED CORRECT