admin: semantic HTML pass — checkbox fieldset, landmarks, dl/dt, autocomplete, inline styles

checkbox-list.php partial:
- Replace outer <div>/<label> with <div>/<span class="admin-row-label"> + inner
  <fieldset class="admin-checkbox-group"><legend class="sr-only"> to satisfy
  WCAG 1.3.1 (group label for multi-checkbox rows without duplicating visible text)
- Replace <div class="admin-checkbox-list"> with <ul>; each checkbox wrapped in <li>

admin.css:
- Drop .admin-checkbox-list; add .admin-body fieldset.admin-checkbox-group rules
  (border/padding reset so it doesn't inherit jury-fieldset box styling)
- Extend form-row label rule to span.admin-row-label
- .admin-inline-form + .admin-inline-form { margin-top:.35rem } replaces inline style
- .admin-input--inline / .admin-select--inline get width:160px (was inline style)
- .admin-tags-count + table th sizing via :has() replaces th inline styles

login.php: wrap content in <main id="main-content"> (missing landmark)

account.php:
- <div class="admin-account-status"> → <dl>; __label <span> → <dt>
- <div class="admin-danger-zone__description"> → <p>

index.php: <div class="admin-maintenance-bar"> → <aside role="status" aria-label="Statut du site">

add.php / edit.php: autocomplete="name" on author field, autocomplete="email" on
contact field (WCAG 1.3.5 / input purpose)

tags.php: all inline style= attributes removed (width, text-align, margin-top,
display:inline); all moved to CSS classes

todo/01-css-semantic-refactor.md

@@ -29,29 +29,28 @@
 
 ## Scattered inline styles in templates
 
-- [ ] `tfe.php` line 146: `style="align-items:start;"` → `.tfe-meta-item--top` in `tfe.css`
-- [ ] `tfe.php` lines 148, 170-172, 193: `font-style:italic`, `margin-top:1.5rem`, `font-size:.88rem;color:#666`, `color:#999;font-style:italic` → `.tfe-note-value`, `.tfe-back-link`, `.tfe-restricted` in `tfe.css`
+- [x] `tfe.php` inline styles — already extracted (no `style=` attributes remain in `public/tfe.php`)
 - [ ] `admin/edit.php`: multiple `style=` on `.admin-form-row` and banner preview → modifier classes in `admin.css`
 
 ## Admin semantic HTML (sections IX–XVI)
 
 - [ ] **`add.php`/`edit.php`**: Replace `<div class="admin-form-row">` with CSS grid on `<form>` children (~20 divs in add.php, ~22 in edit.php)
 - [ ] **`add.php`/`edit.php`**: Replace inner wrapper `<div>` in multi-control rows — use `<small>` for hints, remove the wrapper div
-- [ ] **`add.php`/`edit.php`**: Replace `<div class="admin-checkbox-list">` with `<ul>`; each `<label class="admin-checkbox-label">` becomes `<li>` containing `<label>`
+- [x] **`add.php`/`edit.php`**: Replace `<div class="admin-checkbox-list">` with `<ul>`; each `<label class="admin-checkbox-label">` becomes `<li>` containing `<label>`
 - [ ] **`add.php`/`edit.php`**: Replace `<div class="admin-submit-wrap">` — remove; apply styles directly to `form > button:last-child`
 - [ ] **`add.php`/`edit.php`**: Replace `<div class="admin-alert admin-alert--error/--success">` with `<p role="alert">` / `<p role="status">`
-- [ ] **`index.php`**: Replace `<div class="admin-stats">` / `<div class="admin-stat">` children with `<dl>/<dt>/<dd>`
-- [ ] **`index.php`**: Replace `<div class="admin-maintenance-bar">` with `<aside role="status">` or `<p role="status">`
+- [x] **`index.php`**: Replace `<div class="admin-stats">` / `<div class="admin-stat">` children with `<dl>/<dt>/<dd>`
+- [x] **`index.php`**: Replace `<div class="admin-maintenance-bar">` with `<aside role="status">` or `<p role="status">`
 - [x] **`index.php`**: Add `role="toolbar" aria-label="Actions groupées"` to `<div class="admin-bulk-actions">`
-- [ ] **`index.php`**: Add `scope="col"` to all `<th>` cells in the admin table
+- [x] **`index.php`**: Add `scope="col"` to all `<th>` cells in the admin table
 - [ ] **`index.php`**: Add non-colour indicator + `aria-label="Statut : …"` to status badge `<span>` elements
-- [ ] **`tags.php`**: Add `scope="col"` to `<th>` cells
-- [ ] **`tags.php`**: Move inline `style="margin-top:.35rem;"` on forms → `.admin-inline-form + .admin-inline-form` selector
-- [ ] **`thanks.php`**: Replace `<div class="admin-thesis-info">` with `<section>` + `<h2>` heading; CSS targets `main > section`
-- [ ] **`account.php`**: Replace `<div class="admin-account-status">` with `<dl>`; `__row` → `<div>`, `__label` → `<dt>`
-- [ ] **`account.php`**: Replace `<div class="admin-danger-zone__description">` with `<p>`
-- [ ] **`account.php`**: Move `style="margin-top:3rem;"` on danger zone heading → CSS modifier class
-- [ ] **`login.php`**: Wrap login content in `<main>` (currently no main landmark)
+- [x] **`tags.php`**: Add `scope="col"` to `<th>` cells
+- [x] **`tags.php`**: Move inline `style="margin-top:.35rem;"` on forms → `.admin-inline-form + .admin-inline-form` selector
+- [x] **`thanks.php`**: Replace `<div class="admin-thesis-info">` with `<section>` + `<h2>` heading; CSS targets `main > section`
+- [x] **`account.php`**: Replace `<div class="admin-account-status">` with `<dl>`; `__row` → `<div>`, `__label` → `<dt>`
+- [x] **`account.php`**: Replace `<div class="admin-danger-zone__description">` with `<p>`
+- [x] **`account.php`**: Move `style="margin-top:3rem;"` on danger zone heading → CSS modifier class
+- [x] **`login.php`**: Wrap login content in `<main>` (currently no main landmark)
 - [ ] **`login.php`**: Extract inline styles on `.admin-form-row` and `.admin-submit-wrap` → `.admin-form-row--compact` modifier in `admin.css`
 
 ## Favicon