Export CSV des relevés d'une source

- ExportController::sourceCsv() : génère un CSV avec BOM UTF-8 (compatible Excel)
  séparateur point-virgule, en-têtes = labels des champs, valeurs formatées
  (dates avec calendrier si non grégorien, lieux = nom_long, booléens Oui/Non)
- Route GET export/source/{source}/csv → export.source.csv
- Boutons ↓ CSV et ↓ GEDCOM dans la section relevés de la fiche source

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/ExportController.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\FieldType;
 use App\Enums\SourceStatus;
 use App\Models\Releve;
 use App\Models\Source;
@@ -17,6 +18,44 @@ class ExportController extends Controller
         private readonly GedcomExportService $gedcom,
     ) {}
 
+    /** Export CSV de tous les relevés d'une source */
+    public function sourceCsv(Source $source): Response
+    {
+        $this->authorize('view', $source);
+
+        $source->load(['sourceType.fields', 'releves']);
+        $fields = $source->sourceType->fields->sortBy('order');
+
+        $handle = fopen('php://temp', 'r+');
+
+        // BOM UTF-8 pour la compatibilité Excel
+        fwrite($handle, "\xEF\xBB\xBF");
+
+        // En-tête
+        fputcsv($handle, $fields->pluck('label')->toArray(), ';');
+
+        // Lignes
+        foreach ($source->releves as $releve) {
+            $row = [];
+            foreach ($fields as $field) {
+                $val    = $releve->data[$field->name] ?? null;
+                $row[]  = $this->formatCsvValue($val, $field->type);
+            }
+            fputcsv($handle, $row, ';');
+        }
+
+        rewind($handle);
+        $csv = stream_get_contents($handle);
+        fclose($handle);
+
+        $filename = $this->sanitizeFilename($source->nom) . '.csv';
+
+        return response($csv, 200, [
+            'Content-Type'        => 'text/csv; charset=UTF-8',
+            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
+        ]);
+    }
+
     /** Export de tous les relevés d'une source */
     public function source(Source $source): Response
     {
@@ -106,6 +145,26 @@ class ExportController extends Controller
         ]);
     }
 
+    private function formatCsvValue(mixed $val, FieldType $type): string
+    {
+        if ($val === null || $val === '') {
+            return '';
+        }
+
+        return match ($type) {
+            FieldType::Boolean => $val ? 'Oui' : 'Non',
+            FieldType::Date    => is_array($val)
+                ? trim(($val['valeur'] ?? '') . (
+                    ! empty($val['calendrier']) && $val['calendrier'] !== 'gregorien'
+                        ? ' (' . $val['calendrier'] . ')'
+                        : ''
+                ))
+                : (string) $val,
+            FieldType::Place   => is_array($val) ? ($val['nom_long'] ?? '') : (string) $val,
+            default            => (string) $val,
+        };
+    }
+
     private function sanitizeFilename(string $name): string
     {
         $name = iconv('UTF-8', 'ASCII//TRANSLIT', $name) ?: $name;