feat(portal-shell): thin full-width footer with copyright + a11y links (#88)

## Summary

- Re-add a **40 px** (h-10) footer pinned to the bottom of the shell, spanning the full viewport width below header + sidebar + main.
- Hosts the **`© <year> APF France handicap`** copyright on the left and the FR + EN accessibility statement links on the right, separated by a thin divider.
- **Move the accessibility links out of the sidebar bottom.** Putting legal / compliance links in the footer matches universal web convention and keeps the sidebar focused on product navigation.

## Why footer rather than the help menu

The header's `circle-help` icon will eventually open a help menu (FAQ, keyboard shortcuts, contact support) — that's **product help**, not **legal / compliance**. Auditors (RGAA 4.1, EN 301 549) look for the accessibility statement in the footer; hiding it inside a help dropdown would hurt discoverability. The footer is the canonical home.

## Why both FR + EN stay visible

There is no language toggle yet — `@angular/localize` and its ADR are a separate chantier. Until then, exposing both languages prevents a francophone user from landing on the EN page (or vice versa) via a stale favourite. Once the locale switcher lands, the footer drops the link that doesn't match the active locale.

## Layout

```
:host  flex column, h-100vh
├── app-header           shrink-0, h-16
├── div.shell-body       flex-1, flex row
│   ├── app-sidebar      w-{64|16}, h-full (== shell-body)
│   └── main.shell-main  flex-1, overflow-y-auto
└── app-footer           shrink-0, h-10
```

The sidebar now sits *between* header and footer, so the collapse toggle stays flush above the footer at every viewport size. shell-main still owns its own vertical scroll so long content does not push the footer off-screen.

## What this PR reserves for later (placeholder)

- **Language toggle (FR / EN)** — lands once `@angular/localize` is in.
- **Dev-only version badge** — lands once `environment.ts` per ADR-0018 is wired up.

Both belong in the footer; the layout already has slots for them (center / right groupings).

## Accessibility

- `<footer aria-label="Page footer">` landmark.
- Inline text links inside `<nav aria-label="Legal">` with hover underline + visible focus ring (brand primary, 4 px offset). Inline-link exception applies to the 44×44 touch target (ADR-0016).
- Dark mode: white → `dark:bg-gray-900`, gray-500 text → `dark:text-gray-400`, brand-primary-500 hover → `dark:hover:text-brand-primary-300`.

## Test plan

- [x] `pnpm exec nx run-many -t lint test build --projects=portal-shell` — green (**36 / 36 specs**, +3 for the footer).
- [x] Production build: **121 kB gzip initial** (unchanged from main).
- [ ] Manual: footer pinned at the bottom in every viewport size; sidebar height tracks shell-body so the collapse button sits just above it.
- [ ] Manual: both `/accessibility` and `/accessibilite` links navigate correctly and get `aria-current="page"` when active.
- [ ] Manual: dark mode → footer surface flips with the rest of the shell.
- [ ] Manual: keyboard — Tab into the footer reaches each link, focus ring is visible, Shift+Tab walks back out.

---------

Co-authored-by: Julien Gautier <julien.gautier@apf.asso.fr>
Reviewed-on: #88

apps/portal-shell/src/app/app.html

@@ -6,3 +6,4 @@
     <router-outlet />
   </main>
 </div>
+<app-footer />

apps/portal-shell/src/app/app.spec.ts

@@ -10,7 +10,7 @@ describe('App', () => {
     }).compileComponents();
   });
 
-  it('renders the layout shell — skip link, header, sidebar, main', async () => {
+  it('renders the layout shell — skip link, header, sidebar, main, footer', async () => {
     const fixture = TestBed.createComponent(App);
     await fixture.whenStable();
     const root = fixture.nativeElement as HTMLElement;
@@ -18,5 +18,6 @@ describe('App', () => {
     expect(root.querySelector('app-header')).not.toBeNull();
     expect(root.querySelector('app-sidebar')).not.toBeNull();
     expect(root.querySelector('main#main-content')).not.toBeNull();
+    expect(root.querySelector('app-footer')).not.toBeNull();
   });
 });

apps/portal-shell/src/app/app.ts

@@ -2,10 +2,11 @@ import { ChangeDetectionStrategy, Component } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 import { Header } from './components/header/header';
 import { Sidebar } from './components/sidebar/sidebar';
+import { Footer } from './components/footer/footer';
 
 @Component({
   selector: 'app-root',
-  imports: [RouterOutlet, Header, Sidebar],
+  imports: [RouterOutlet, Header, Sidebar, Footer],
   templateUrl: './app.html',
   styleUrl: './app.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,

apps/portal-shell/src/app/components/footer/footer.html

@@ -0,0 +1,26 @@
+<footer
+  aria-label="Page footer"
+  class="flex h-10 shrink-0 items-center justify-between border-t border-gray-200 bg-white px-4 text-xs text-gray-500 dark:border-gray-800 dark:bg-gray-900 dark:text-gray-400 sm:px-6"
+>
+  <p>&copy; {{ year }} APF France handicap</p>
+
+  <nav aria-label="Legal">
+    <ul class="flex items-center gap-4">
+      <li>
+        <a
+          routerLink="/accessibility"
+          class="rounded hover:text-brand-primary-500 hover:underline focus-visible:outline-2 focus-visible:outline-offset-4 focus-visible:outline-brand-primary-500 dark:hover:text-brand-primary-300"
+          >Accessibility</a
+        >
+      </li>
+      <li aria-hidden="true" class="text-gray-300 dark:text-gray-700">|</li>
+      <li>
+        <a
+          routerLink="/accessibilite"
+          class="rounded hover:text-brand-primary-500 hover:underline focus-visible:outline-2 focus-visible:outline-offset-4 focus-visible:outline-brand-primary-500 dark:hover:text-brand-primary-300"
+          >Accessibilité</a
+        >
+      </li>
+    </ul>
+  </nav>
+</footer>

apps/portal-shell/src/app/components/footer/footer.spec.ts

@@ -0,0 +1,35 @@
+import { TestBed } from '@angular/core/testing';
+import { provideRouter } from '@angular/router';
+import { Footer } from './footer';
+
+describe('Footer', () => {
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [Footer],
+      providers: [provideRouter([])],
+    }).compileComponents();
+  });
+
+  it('exposes a footer landmark', async () => {
+    const fixture = TestBed.createComponent(Footer);
+    await fixture.whenStable();
+    const root = fixture.nativeElement as HTMLElement;
+    expect(root.querySelector('footer[aria-label="Page footer"]')).not.toBeNull();
+  });
+
+  it('shows the APF copyright with the current year', async () => {
+    const fixture = TestBed.createComponent(Footer);
+    await fixture.whenStable();
+    const text = (fixture.nativeElement as HTMLElement).textContent ?? '';
+    expect(text).toContain('APF France handicap');
+    expect(text).toContain(String(new Date().getFullYear()));
+  });
+
+  it('renders both accessibility statement links (EN + FR)', async () => {
+    const fixture = TestBed.createComponent(Footer);
+    await fixture.whenStable();
+    const root = fixture.nativeElement as HTMLElement;
+    expect(root.querySelector('a[href="/accessibility"]')).not.toBeNull();
+    expect(root.querySelector('a[href="/accessibilite"]')).not.toBeNull();
+  });
+});

apps/portal-shell/src/app/components/footer/footer.ts

@@ -0,0 +1,25 @@
+import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { RouterLink } from '@angular/router';
+
+/**
+ * Thin full-width footer pinned to the bottom of the shell.
+ *
+ * v1 ships:
+ *   - APF France handicap copyright with the current year.
+ *   - Accessibility statement links in both languages (RGAA-mandated;
+ *     ADR-0016). Both stay visible until the language selector lands,
+ *     after which we drop the one matching the current locale.
+ *
+ * The footer is reserved for cross-cutting page furniture — once we
+ * have them, the language toggle and a dev-only version badge land
+ * here. Real product navigation stays in the sidebar.
+ */
+@Component({
+  selector: 'app-footer',
+  imports: [RouterLink],
+  templateUrl: './footer.html',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class Footer {
+  protected readonly year = new Date().getFullYear();
+}

apps/portal-shell/src/app/components/header/header.html

@@ -1,5 +1,5 @@
 <header
-  class="flex h-16 items-center border-b border-gray-200 bg-white dark:border-gray-800 dark:bg-gray-900"
+  class="flex h-16 shrink-0 items-center border-b border-gray-200 bg-white dark:border-gray-800 dark:bg-gray-900"
 >
   <div class="header__logo-zone" [class.header__logo-zone--collapsed]="collapsed()">
     <a

apps/portal-shell/src/app/components/sidebar/sidebar.html

@@ -52,41 +52,6 @@
   </nav>
 
   <div class="border-t border-gray-200 px-2 py-3 dark:border-gray-800">
-    <nav aria-label="Accessibility" class="mb-3">
-      <ul class="flex flex-col gap-1">
-        <li>
-          <a
-            routerLink="/accessibility"
-            routerLinkActive="sidebar__link--active"
-            ariaCurrentWhenActive="page"
-            class="sidebar__link"
-            [attr.aria-label]="collapsed() ? 'Accessibility (English)' : null"
-            [title]="collapsed() ? 'Accessibility (English)' : ''"
-          >
-            <app-icon name="accessibility" />
-            @if (!collapsed()) {
-            <span class="sidebar__label">Accessibility</span>
-            }
-          </a>
-        </li>
-        <li>
-          <a
-            routerLink="/accessibilite"
-            routerLinkActive="sidebar__link--active"
-            ariaCurrentWhenActive="page"
-            class="sidebar__link"
-            [attr.aria-label]="collapsed() ? 'Accessibilité (Français)' : null"
-            [title]="collapsed() ? 'Accessibilité (Français)' : ''"
-          >
-            <app-icon name="accessibility" />
-            @if (!collapsed()) {
-            <span class="sidebar__label">Accessibilité</span>
-            }
-          </a>
-        </li>
-      </ul>
-    </nav>
-
     @if (!collapsed()) {
     <p
       class="mb-2 px-3 text-xs text-gray-500 dark:text-gray-400"

apps/portal-shell/src/app/components/sidebar/sidebar.spec.ts

@@ -20,12 +20,12 @@ describe('Sidebar', () => {
     expect(text).toContain('Communication');
   });
 
-  it('renders the FR + EN accessibility links', async () => {
+  it('does not render the accessibility links (now lives in the footer)', async () => {
     const fixture = TestBed.createComponent(Sidebar);
     await fixture.whenStable();
     const root = fixture.nativeElement as HTMLElement;
-    expect(root.querySelector('a[href="/accessibility"]')).not.toBeNull();
+    expect(root.querySelector('a[href="/accessibility"]')).toBeNull();
-    expect(root.querySelector('a[href="/accessibilite"]')).not.toBeNull();
+    expect(root.querySelector('a[href="/accessibilite"]')).toBeNull();
   });
 
   it('starts expanded and collapses on toggle, persisting to localStorage', async () => {