---
phase: 10-ux-interaction
plan: 02
type: execute
wave: 0
depends_on: []
files_modified:
  - frontend/src/components/ui/EmptyState.vue
  - frontend/src/components/ui/__tests__/EmptyState.test.js
autonomous: true
requirements: [UX-01]
must_haves:
  truths:
    - "EmptyState renders the headline, subtext, and optional icon based on props"
    - "EmptyState renders nothing in the CTA area when the #cta slot is empty"
    - "EmptyState supports size='sm' for sidebar micro states and size='md' (default) for full centered layout"
  artifacts:
    - path: "frontend/src/components/ui/EmptyState.vue"
      provides: "Shared empty-state component used in 7+ contexts"
    - path: "frontend/src/components/ui/__tests__/EmptyState.test.js"
      provides: "EmptyState unit tests"
  key_links:
    - from: "EmptyState.vue template"
      to: "AppIcon.vue"
      via: "import + <AppIcon :name=\"icon\" />"
      pattern: "import AppIcon"
---

<objective>
Create `frontend/src/components/ui/EmptyState.vue` — a shared, props-driven empty-state component that replaces every inline "No items yet" / "Nothing here" pattern across StorageBrowser, SharedView, CloudStorageView, AppSidebar, AdminAuditView.

Purpose: Per D-06/D-07, every zero-content context gets its own icon + headline + subtext + optional CTA slot. No per-view "no items" text remains in the app after Wave 1 wiring.

Output: `EmptyState.vue` (Options API, props: icon/headline/subtext/size, #cta slot) + Vitest unit tests covering prop rendering, slot rendering, and size variants.
</objective>

<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>

<context>
@CLAUDE.md
@.planning/phases/10-ux-interaction/10-CONTEXT.md
@.planning/phases/10-ux-interaction/10-RESEARCH.md
@.planning/phases/10-ux-interaction/10-PATTERNS.md
@frontend/src/components/folders/__tests__/FolderBreadcrumb.test.js
@frontend/src/views/SharedView.vue
@frontend/src/components/layout/AppSidebar.vue

<interfaces>
Per D-06, D-07 (CONTEXT.md):
- Props:
  - `icon` (String, default null) — name from AppIcon registry (e.g. 'folder', 'inbox', 'cloud', 'search')
  - `headline` (String, required) — main message text
  - `subtext` (String, default '') — secondary description
  - `size` (String, default 'md') — accepts 'sm' for sidebar micro states or 'md' for default centered layout
- Named `#cta` slot — renders nothing when slot is empty (use `$slots.cta` check or `<slot name="cta">` with no fallback content)
- Component is Options API (CLAUDE.md non-negotiable for new components)
- Depends on AppIcon.vue (from 10-01) — import as child component

Size class mapping (from 10-PATTERNS.md):
| size | container | icon | headline | subtext |
|------|-----------|------|----------|---------|
| md (default) | `text-center py-10 px-4` | `w-8 h-8 mx-auto mb-3 text-gray-300` | `text-sm font-medium text-gray-500` | `text-xs text-gray-400 mt-1` |
| sm | `flex items-center gap-2 py-1 text-xs text-gray-400` | `w-3.5 h-3.5 shrink-0` | `''` (empty — inherits from container) | `'hidden'` (sidebar micro states show no subtext) |
</interfaces>
</context>

<tasks>

<task type="auto" tdd="true">
  <name>Task 1: Create EmptyState.test.js with failing tests</name>
  <files>frontend/src/components/ui/__tests__/EmptyState.test.js</files>
  <read_first>
    - frontend/src/components/folders/__tests__/FolderBreadcrumb.test.js (test style)
    - .planning/phases/10-ux-interaction/10-PATTERNS.md §"EmptyState.vue" (target structure + class table)
  </read_first>
  <behavior>
    - Test 1: `renders headline text from the headline prop` — mount with headline='Nothing here', assert wrapper.text() includes 'Nothing here'
    - Test 2: `renders subtext when provided; omits when empty` — mount with subtext='hello', assert text includes 'hello'; mount with no subtext, assert no second <p>
    - Test 3: `renders AppIcon when icon prop is set; renders no icon when null` — mount with icon='folder' and stubs AppIcon, assert AppIcon component is found; mount with icon=null, assert no AppIcon
    - Test 4: `renders nothing in the CTA area when #cta slot is empty` — mount with no slots, assert wrapper does NOT contain any <button> or <a> elements
    - Test 5: `renders the #cta slot content when provided` — mount with slots: { cta: '<button data-test="cta-btn">Upload</button>' }, assert wrapper.find('[data-test="cta-btn"]').exists() === true
    - Test 6: `size='sm' applies the sidebar micro layout (flex container with gap-2)` — mount with size='sm', assert root element classList contains 'flex' and 'gap-2'
    - Test 7: `default size (md) applies the centered layout (text-center py-10)` — mount default, assert classList contains 'text-center' and 'py-10'
  </behavior>
  <action>
    Create `frontend/src/components/ui/__tests__/EmptyState.test.js`. Use Vitest + @vue/test-utils. Stub the AppIcon component via `global.stubs: { AppIcon: true }` in mount options so tests don't depend on Wave 0 task ordering. Tests will fail until Task 2 creates EmptyState.vue. Write all 7 tests above as concrete `it(...)` blocks.
  </action>
  <verify>
    <automated>cd frontend && npm run test -- --run EmptyState</automated>
    Expected: tests collected; all 7 FAIL with module-not-found (RED phase).
  </verify>
  <acceptance_criteria>
    - File `frontend/src/components/ui/__tests__/EmptyState.test.js` exists
    - File contains exactly 7 `it(...)` blocks
    - Running `cd frontend && npm run test -- --run EmptyState` shows 7 failing tests
    - Tests stub AppIcon via mount options (no hard dependency on AppIcon.vue existing)
  </acceptance_criteria>
  <done>Test file exists with 7 failing tests describing the EmptyState contract.</done>
</task>

<task type="auto" tdd="true">
  <name>Task 2: Implement EmptyState.vue</name>
  <files>frontend/src/components/ui/EmptyState.vue</files>
  <read_first>
    - frontend/src/components/ui/__tests__/EmptyState.test.js (the failing tests)
    - .planning/phases/10-ux-interaction/10-PATTERNS.md §"EmptyState.vue" (full target structure incl. class table)
    - frontend/src/views/SharedView.vue (existing inline empty-state pattern being replaced)
    - frontend/src/components/layout/AppSidebar.vue (existing sidebar micro pattern: pl-7 py-1 text-xs text-gray-400)
  </read_first>
  <behavior>
    - Options API component named `EmptyState`
    - Registers `AppIcon` as a child component (imported from `./AppIcon.vue`)
    - Props: `icon` (String, default null), `headline` (String, required), `subtext` (String, default ''), `size` (String, default 'md')
    - Computed `containerClass`, `iconClass`, `headlineClass`, `subtextClass` returning the strings from the class table in 10-PATTERNS.md
    - Template renders, in order: container `<div>`, AppIcon (when icon truthy), headline `<p>`, subtext `<p>` (when subtext truthy AND size !== 'sm' — sidebar micro hides subtext via the `hidden` class), `<slot name="cta" />`
  </behavior>
  <action>
    Create `frontend/src/components/ui/EmptyState.vue` using the Options API target structure from `10-PATTERNS.md §"EmptyState.vue"`. Import `AppIcon` from `./AppIcon.vue`. Use the exact class mapping table from PATTERNS:
    - size='md' container: `'text-center py-10 px-4'`; icon: `'w-8 h-8 mx-auto mb-3 text-gray-300'`; headline: `'text-sm font-medium text-gray-500'`; subtext: `'text-xs text-gray-400 mt-1'`
    - size='sm' container: `'flex items-center gap-2 py-1 text-xs text-gray-400'`; icon: `'w-3.5 h-3.5 shrink-0'`; headline: `''`; subtext: `'hidden'`

    Template structure:
    ```
    <template>
      <div :class="containerClass">
        <AppIcon v-if="icon" :name="icon" :class="iconClass" />
        <p :class="headlineClass">{{ headline }}</p>
        <p v-if="subtext" :class="subtextClass">{{ subtext }}</p>
        <slot name="cta" />
      </div>
    </template>
    ```

    Do NOT add explanatory comments. Use Options API (CLAUDE.md).
  </action>
  <verify>
    <automated>cd frontend && npm run test -- --run EmptyState</automated>
    Expected: all 7 tests PASS (GREEN).
  </verify>
  <acceptance_criteria>
    - File `frontend/src/components/ui/EmptyState.vue` exists
    - File imports AppIcon from `./AppIcon.vue`
    - File contains `name: 'EmptyState'`
    - File contains all 4 computed properties: `containerClass`, `iconClass`, `headlineClass`, `subtextClass`
    - File contains `<slot name="cta" />`
    - All 7 tests pass: `cd frontend && npm run test -- --run EmptyState` exits 0
    - File uses Options API, not `<script setup>`
  </acceptance_criteria>
  <done>EmptyState.vue implemented; all 7 tests green.</done>
</task>

</tasks>

<verification>
- `cd frontend && npm run test -- --run EmptyState` exits 0 with 7 passing tests
- `grep -E "name:\\s*'EmptyState'" frontend/src/components/ui/EmptyState.vue` returns 1 match
- `grep -E "import AppIcon" frontend/src/components/ui/EmptyState.vue` returns 1 match
- `grep -E "slot name=\"cta\"" frontend/src/components/ui/EmptyState.vue` returns 1 match
- `grep -v '^#' frontend/src/components/ui/EmptyState.vue | grep -c '<script setup>'` returns 0 (Options API enforced)
</verification>

<success_criteria>
EmptyState.vue is ready to be wired into all 9 empty-state contexts identified in 10-RESEARCH.md §Component Inventory §3. Wave 1 plans 10-06, 10-07, 10-08 will replace inline empty-state divs with `<EmptyState icon="..." headline="..." subtext="..." />` blocks (plus #cta slot where applicable).
</success_criteria>

<output>
Create `.planning/phases/10-ux-interaction/10-02-SUMMARY.md` when done.
</output>