Extract ThesisCreateController; add Database publish methods

Consolidate action handlers into controller methods (todo/02-php-components.md).

src/ThesisCreateController.php (new, 435 lines)
  Mirrors ThesisEditController for the add-thesis flow.

  make()           — factory; instantiates Database via new Database()
  loadFormData()   — returns all lookup tables needed by admin/add.php
                     (orientations, apPrograms, finalityTypes, languages,
                      formatTypes, licenseTypes)
  submit(post, files) — full new-thesis creation pipeline:
    1. validateAndSanitise() — trims/strips HTML, validates required fields,
       year range, orientation/ap/finality IDs, language selection, max-10
       keywords, URL format; throws named Exception on failure
    2. findOrCreateAuthor() — reuses existing DB method
    3. Transaction: createThesis + setThesisJury + setThesisLanguages +
       setThesisFormats + setThesisTags; rolls back on any failure
    4. File uploads outside transaction: cover image (JPG/PNG only, stored in
       storage/covers/), banner via handleBannerUpload(), thesis files
       (PDF/JPG/PNG/MP4/ZIP/VTT, stored in storage/theses/YEAR/IDENT/,
       file_type auto-detected: caption/annex/main/other)
  autofocusFieldForError() — static; maps exception messages to field names
    for WCAG 3.3.1 autofocus on re-render (same contract as
    ThesisEditController::autofocusFieldForError)

admin/actions/formulaire.php  346 → 45 lines
  Now: bootstrap + CSRF guard + ThesisCreateController::make()->submit() +
  flash/redirect on error. All validation, DB logic, and file handling removed.

admin/add.php
  Lookup-table block (new Database() + 6 individual DB calls) replaced with
  ThesisCreateController::make()->loadFormData() + extract().

src/Database.php — two new methods added
  setPublished(int , bool ): void
    UPDATE theses SET is_published = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?
  bulkSetPublished(int[] , bool ): void
    Same but with an IN (...) clause for multiple IDs

admin/actions/publish.php  100 → 65 lines
  Raw SQL (->prepare('UPDATE theses SET is_published = ?...')) replaced
  with ->setPublished() / ->bulkSetPublished(). No raw PDO calls remain
  in any action handler file.

TODO.md

@@ -11,6 +11,7 @@ Pending tasks have been split into topic files under [`todo/`](todo/README.md):
 
 ## Recently completed (this session)
 
+- [x] `src/ThesisCreateController.php` — extracted all validation, DB writes, and file-upload handling from `admin/actions/formulaire.php` into a dedicated controller; `make()` factory instantiates `Database`; `loadFormData()` returns all lookup tables for the add-form view; `submit(post, files)` runs the full creation flow: validates/sanitises all POST fields, calls `findOrCreateAuthor`, inserts thesis row via `createThesis`, links jury/languages/formats/tags inside a transaction, then processes cover image, banner, and multi-file uploads outside the transaction; `autofocusFieldForError()` maps exception messages to WCAG 3.3.1 autofocus field hints; `actions/formulaire.php` reduced 346→45 lines (CSRF guard + one `submit()` call); `admin/add.php` lookup-table block replaced with `ThesisCreateController::make()->loadFormData()`; `Database::setPublished()` and `Database::bulkSetPublished()` added, eliminating raw SQL from `actions/publish.php` (100→65 lines); no raw PDO calls remain in any action handler file
 - [x] `src/HomeController.php` — extracted all data-fetching logic from `public/index.php` into a dedicated controller class; `create()` returns a ready instance with `Database` singleton injected; `handle()` parses `page`/`year` GET params, determines display mode (default-random-latest / year-filtered / paginated-all), runs the appropriate DB queries (`getLatestPublishedYear`, `getLatestYearTheses`, `searchTheses`+`countSearchResults`, `getPublishedTheses`+`countPublishedTheses`), batch-loads cover images via `getCoverPathsForTheses`, assembles OG/meta tags, and returns a flat view-variable array; `public/index.php` reduced 100→71 lines (6-line dispatcher + pure view template); `todo/02-php-components.md` “Extract remaining controllers” task marked done
 
 - [x] `src/TfeController.php` — extracted all data-fetching, OG-tag assembly, and view-variable construction from `public/tfe.php` into a dedicated controller class; `create()` returns a ready instance with `Database` singleton injected; `handle()` validates the `id` param (redirects on missing/invalid), loads the thesis row via `getThesisById()`, calls `getThesisAccessTypeId()` for visibility gating, builds the meta description (strip_tags + 160-char truncation), resolves the OG image (banner_path → first image file → empty), assembles the full `$ogTags` array (type/title/description/url/image/image_alt/site_name/article_author/article_published_time), collects WebVTT caption paths for N-th-video pairing, and returns a flat view-variable array; `captionFiles` replaces inline `$_captionFiles` array in the view; `$db` reference removed from `tfe.php` entirely; `tfe.php` reduced 271→206 lines (9-line dispatcher + pure view template); `todo/02-php-components.md` “Extract remaining controllers” and “Move OG tag construction into controller logic” tasks updated