fix(partage): smtp view missing in schema + thanks redirect broken

- Add v_smtp_active VIEW to schema.sql (was only in migration 012,
  causing SmtpRelay::isConfigured() to always return false on fresh installs)
- Change thanks redirect from /partage/thanks.php to /partage/thanks
  (nginx 'location ~ \.php$ { deny all }' blocked the .php URL)
- Route /partage/thanks in index.php before slug validation
- Guard App::boot() in thanks.php to avoid double-boot when included

app/public/partage/index.php

@@ -21,6 +21,13 @@ $parts = explode('/', $path);
 $slug  = $parts[0] ?? '';
 $action = $parts[1] ?? '';
 
+// Special route: /partage/thanks?id=N
+if ($slug === 'thanks' || $slug === 'thanks.php') {
+    App::boot();
+    require_once __DIR__ . '/thanks.php';
+    exit;
+}
+
 // Validate slug format: YYYYMMDD-XXXXXXXX (17 chars)
 if (!preg_match('#^\d{8}-[A-Z0-9+/]{8}$#', $slug)) {
     App::boot();
@@ -481,7 +488,7 @@ function handleShareLinkSubmission(string $slug): void
         $_SESSION['share_email_sent'] = $emailSent;
 
         // Redirect to thanks page
-        header('Location: /partage/thanks.php?id=' . urlencode((string)$thesisId));
+        header('Location: /partage/thanks?id=' . urlencode((string)$thesisId));
         exit();
     } catch (Exception $e) {
         error_log('Share link submission error: ' . $e->getMessage());

app/public/partage/thanks.php

@@ -3,9 +3,10 @@
  * Thanks page for share-link submissions.
  * Displays a centered confirmation with a link to create another thesis via the same link.
  */
-require_once __DIR__ . '/../../bootstrap.php';
-
-App::boot();
+if (!defined('APP_ROOT')) {
+    require_once __DIR__ . '/../../bootstrap.php';
+    App::boot();
+}
 
 $thesisId = isset($_GET['id']) ? (int)$_GET['id'] : 0;
 

app/storage/schema.sql

@@ -341,6 +341,9 @@ CREATE TABLE IF NOT EXISTS smtp_settings (
 
 INSERT OR IGNORE INTO smtp_settings (id) VALUES (1);
 
+CREATE VIEW IF NOT EXISTS v_smtp_active AS
+SELECT * FROM smtp_settings WHERE id = 1;
+
 -- ============================================================================
 -- APROPOS CONTENTS (structured data for the "À propos" page)
 -- ============================================================================