From 38f9f164f1ddfa4ad09133eaf1c3fd7ffeebe673 Mon Sep 17 00:00:00 2001
From: THOLOT DECHENE Matthieu <matthieu@yuno.malio.fr>
Date: Mon, 1 Jun 2026 19:28:34 +0000
Subject: [PATCH] =?UTF-8?q?[ERP-58]=20Impl=C3=A9menter=20l'export=20XLSX?=
 =?UTF-8?q?=20du=20r=C3=A9pertoire=20clients=20(#37)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

## Contexte
Ticket ERP-58 (M1 Commercial, spec-back § 4.6) — export XLSX du répertoire clients.
Branche stackée sur ERP-57. **Cible la MR sur \`feature/ERP-57-...\`** (squash merge).

## Objectif d'archi : un service d'export RÉUTILISABLE
Le générique vit dans \`Shared\`, le module Client ne déclare que QUOI exporter.

### Shared (le COMMENT — sans métier)
- \`Shared/Domain/Contract/SpreadsheetExporterInterface\` : \`export(string $sheetTitle, array $headers, iterable $rows): string\`. Zéro connaissance métier.
- \`Shared/Infrastructure/Export/PhpSpreadsheetExporter\` : implémentation PhpSpreadsheet (en-tête ligne 1 + lignes, retour binaire via fichier temporaire). Titre d'onglet assaini (≤ 31 car., caractères Excel interdits retirés). Supporte un \`iterable\` paresseux (generator).
- Auto-aliasé (un seul implémenteur) → \`SpreadsheetExporterInterface\` résout vers \`PhpSpreadsheetExporter\`.

> Tout futur module réutilise \`SpreadsheetExporterInterface\` sans toucher au Client.

### Commercial (le QUOI)
- \`ClientExportController\` (controller custom, \`#[Route('/api/clients/export.xlsx', priority: 1)]\` — **priority:1 obligatoire** pour éviter le conflit API Platform \`{id}\`). Security \`commercial.clients.view\`.
- Mêmes filtres que \`GET /api/clients\` (non archivés par défaut, \`?search\`, \`?categoryType\`, \`?includeArchived\`). **Filtrage factorisé dans \`ClientRepository::createListQueryBuilder()\`** (search + categoryType déplacés depuis \`ClientProvider\`) → liste paginée et export partagent strictement la même logique, zéro duplication.
- Colonnes (§ 4.6) : Nom entreprise, Nom contact principal, Prénom, Tél. principal, Tél. secondaire, Email, Catégories (CSV), Sites (CSV = union distincte des sites des adresses), **SIREN (omis si pas \`commercial.clients.accounting.view\`)**, Date de création.
- Réponse : \`Content-Type: …spreadsheetml.sheet\`, \`Content-Disposition: attachment; filename="repertoire-clients-{YYYYMMDD}.xlsx"\`.

## Dépendance
\`composer require phpoffice/phpspreadsheet\` (^5.7). Nettoyage recipes vérifié : seuls \`composer.json\`/\`composer.lock\` modifiés (pas de scaffolding parasite, \`symfony.lock\` désormais versionné).

## Tests (404 OK)
- **Unitaire Shared** : XLSX relisible (en-têtes + 2 lignes), generator, titre assaini.
- **Fonctionnel** : 200 (Content-Type + filename), exclusion archives par défaut, \`?search\`/\`?categoryType\`, SIREN présent (accounting.view) / absent (view seul), 403 sans \`clients.view\`, 401 anonyme.

## Note
Au démarrage, \`symfony/intl\` (requis par ERP-57, contrainte \`Bic\`) manquait du vendor → \`composer install\` joué pour rétablir une base saine.

## ⚠️ Heads-up review (@Tristan) — fichiers « propriété » d'ERP-55 touchés
Cette MR refactore deux fichiers introduits par ERP-55 :
- **`ClientRepository::createListQueryBuilder()`** accueille désormais le filtrage `search` + `categoryType` (signature `(bool $includeArchived, ?string $search, ?string $categoryType)`).
- **`ClientProvider`** délègue ce filtrage au repository → il **perd sa dépendance `EntityManager`** et ses méthodes privées `applySearch` / `applyCategoryType`.

**Pourquoi** : DRY entre la liste paginée (`GET /api/clients`) et l'export — une seule source de vérité pour la sélection des clients. Effet de bord positif : ça résout **plus proprement la fuite d'abstraction** que tu avais pointée en revue ERP-55 (P2) — la sous-requête `categoryType` n'est plus construite via l'`EntityManager` injecté dans le provider, mais à l'intérieur du repository (là où l'accès Doctrine est légitime).

Pas de changement de comportement de l'API liste : régression couverte par `ClientApiTest` (tri, exclusion archives, includeArchived, pagination) — tout vert.

---------

Co-authored-by: Matthieu <contact@malio.fr>
Reviewed-on: https://gitea.malio.fr/MALIO-DEV/Starseed/pulls/37
Co-authored-by: THOLOT DECHENE Matthieu <matthieu@yuno.malio.fr>
Co-committed-by: THOLOT DECHENE Matthieu <matthieu@yuno.malio.fr>
---
 composer.json                                 |   1 +
 composer.lock                                 | 505 +++++++++++++++---
 .../Repository/ClientRepositoryInterface.php  |  14 +-
 .../State/Provider/ClientProvider.php         |  63 +--
 .../Controller/ClientExportController.php     | 201 +++++++
 .../Doctrine/DoctrineClientRepository.php     |  55 +-
 .../Contract/SpreadsheetExporterInterface.php |  31 ++
 .../Export/PhpSpreadsheetExporter.php         |  85 +++
 .../Api/ClientExportControllerTest.php        | 185 +++++++
 .../Export/PhpSpreadsheetExporterTest.php     |  99 ++++
 10 files changed, 1101 insertions(+), 138 deletions(-)
 create mode 100644 src/Module/Commercial/Infrastructure/Controller/ClientExportController.php
 create mode 100644 src/Shared/Domain/Contract/SpreadsheetExporterInterface.php
 create mode 100644 src/Shared/Infrastructure/Export/PhpSpreadsheetExporter.php
 create mode 100644 tests/Module/Commercial/Api/ClientExportControllerTest.php
 create mode 100644 tests/Shared/Infrastructure/Export/PhpSpreadsheetExporterTest.php

diff --git a/composer.json b/composer.json
index 1d80d05..b4bf311 100644
--- a/composer.json
+++ b/composer.json
@@ -16,6 +16,7 @@
         "nelmio/cors-bundle": "^2.6",
         "nyholm/psr7": "^1.8",
         "phpdocumentor/reflection-docblock": "^5.6|^6.0",
+        "phpoffice/phpspreadsheet": "^5.7",
         "phpstan/phpdoc-parser": "^2.3",
         "symfony/asset": "8.0.*",
         "symfony/console": "8.0.*",
diff --git a/composer.lock b/composer.lock
index af355c0..4bf713f 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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+    "content-hash": "aada2e60fd7563f1498b5505b37e3f4b",
     "packages": [
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             "name": "api-platform/doctrine-common",
@@ -1160,6 +1160,85 @@
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+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e"
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+                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
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+                "phpstan/phpstan-strict-rules": "^1 || ^2",
+                "phpunit/phpunit": "^8 || ^9"
+            },
+            "type": "library",
+            "extra": {
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+                        "extension.neon"
+                    ]
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+                "branch-alias": {
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
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+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "http://seld.be"
+                }
+            ],
+            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
+            "keywords": [
+                "PCRE",
+                "preg",
+                "regex",
+                "regular expression"
+            ],
+            "support": {
+                "issues": "https://github.com/composer/pcre/issues",
+                "source": "https://github.com/composer/pcre/tree/3.3.2"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
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+            "time": "2024-11-12T16:29:46+00:00"
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             "version": "3.4.4",
@@ -2630,6 +2709,191 @@
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             "time": "2025-12-20T17:47:00+00:00"
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+        {
+            "name": "maennchen/zipstream-php",
+            "version": "3.2.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/maennchen/ZipStream-PHP.git",
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+                "ext-zlib": "*",
+                "php-64bit": "^8.3"
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+            "require-dev": {
+                "brianium/paratest": "^7.7",
+                "ext-zip": "*",
+                "friendsofphp/php-cs-fixer": "^3.86",
+                "guzzlehttp/guzzle": "^7.5",
+                "mikey179/vfsstream": "^1.6",
+                "php-coveralls/php-coveralls": "^2.5",
+                "phpunit/phpunit": "^12.0",
+                "vimeo/psalm": "^6.0"
+            },
+            "suggest": {
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+                "psr/http-message": "^2.0"
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+                "psr-4": {
+                    "ZipStream\\": "src/"
+                }
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+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
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+            "authors": [
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+                    "name": "Paul Duncan",
+                    "email": "pabs@pablotron.org"
+                },
+                {
+                    "name": "Jonatan Männchen",
+                    "email": "jonatan@maennchen.ch"
+                },
+                {
+                    "name": "Jesse Donat",
+                    "email": "donatj@gmail.com"
+                },
+                {
+                    "name": "András Kolesár",
+                    "email": "kolesar@kolesar.hu"
+                }
+            ],
+            "description": "ZipStream is a library for dynamically streaming dynamic zip files from PHP without writing to the disk at all on the server.",
+            "keywords": [
+                "stream",
+                "zip"
+            ],
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+                "source": "https://github.com/maennchen/ZipStream-PHP/tree/3.2.2"
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+            "funding": [
+                {
+                    "url": "https://github.com/maennchen",
+                    "type": "github"
+                }
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+            "time": "2026-04-11T18:38:28+00:00"
+        },
+        {
+            "name": "markbaker/complex",
+            "version": "3.0.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPComplex.git",
+                "reference": "95c56caa1cf5c766ad6d65b6344b807c1e8405b9"
+            },
+            "dist": {
+                "type": "zip",
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+                "reference": "95c56caa1cf5c766ad6d65b6344b807c1e8405b9",
+                "shasum": ""
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+            "require": {
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+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "dev-master",
+                "phpcompatibility/php-compatibility": "^9.3",
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+                "squizlabs/php_codesniffer": "^3.7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Complex\\": "classes/src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mark Baker",
+                    "email": "mark@lange.demon.co.uk"
+                }
+            ],
+            "description": "PHP Class for working with complex numbers",
+            "homepage": "https://github.com/MarkBaker/PHPComplex",
+            "keywords": [
+                "complex",
+                "mathematics"
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+            "support": {
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+                "source": "https://github.com/MarkBaker/PHPComplex/tree/3.0.2"
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+            "time": "2022-12-06T16:21:08+00:00"
+        },
+        {
+            "name": "markbaker/matrix",
+            "version": "3.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/MarkBaker/PHPMatrix.git",
+                "reference": "728434227fe21be27ff6d86621a1b13107a2562c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/MarkBaker/PHPMatrix/zipball/728434227fe21be27ff6d86621a1b13107a2562c",
+                "reference": "728434227fe21be27ff6d86621a1b13107a2562c",
+                "shasum": ""
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+            },
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+                "dealerdirect/phpcodesniffer-composer-installer": "dev-master",
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+                "phpdocumentor/phpdocumentor": "2.*",
+                "phploc/phploc": "^4.0",
+                "phpmd/phpmd": "2.*",
+                "phpunit/phpunit": "^7.0 || ^8.0 || ^9.0",
+                "sebastian/phpcpd": "^4.0",
+                "squizlabs/php_codesniffer": "^3.7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Matrix\\": "classes/src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Mark Baker",
+                    "email": "mark@demon-angel.eu"
+                }
+            ],
+            "description": "PHP Class for working with matrices",
+            "homepage": "https://github.com/MarkBaker/PHPMatrix",
+            "keywords": [
+                "mathematics",
+                "matrix",
+                "vector"
+            ],
+            "support": {
+                "issues": "https://github.com/MarkBaker/PHPMatrix/issues",
+                "source": "https://github.com/MarkBaker/PHPMatrix/tree/3.0.1"
+            },
+            "time": "2022-12-02T22:17:43+00:00"
+        },
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             "version": "3.10.0",
@@ -3052,6 +3316,115 @@
             },
             "time": "2026-01-06T21:53:42+00:00"
         },
+        {
+            "name": "phpoffice/phpspreadsheet",
+            "version": "5.7.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/PHPOffice/PhpSpreadsheet.git",
+                "reference": "9f55d3b9b7bcb1084fda8340e4b7ce4ed10cd0c8"
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+                "url": "https://api.github.com/repos/PHPOffice/PhpSpreadsheet/zipball/9f55d3b9b7bcb1084fda8340e4b7ce4ed10cd0c8",
+                "reference": "9f55d3b9b7bcb1084fda8340e4b7ce4ed10cd0c8",
+                "shasum": ""
+            },
+            "require": {
+                "composer/pcre": "^1||^2||^3",
+                "ext-ctype": "*",
+                "ext-dom": "*",
+                "ext-fileinfo": "*",
+                "ext-filter": "*",
+                "ext-gd": "*",
+                "ext-iconv": "*",
+                "ext-libxml": "*",
+                "ext-mbstring": "*",
+                "ext-simplexml": "*",
+                "ext-xml": "*",
+                "ext-xmlreader": "*",
+                "ext-xmlwriter": "*",
+                "ext-zip": "*",
+                "ext-zlib": "*",
+                "maennchen/zipstream-php": "^2.1 || ^3.0",
+                "markbaker/complex": "^3.0",
+                "markbaker/matrix": "^3.0",
+                "php": "^8.1",
+                "psr/simple-cache": "^1.0 || ^2.0 || ^3.0"
+            },
+            "require-dev": {
+                "dealerdirect/phpcodesniffer-composer-installer": "dev-main",
+                "dompdf/dompdf": "^2.0 || ^3.0",
+                "ext-intl": "*",
+                "friendsofphp/php-cs-fixer": "^3.2",
+                "mitoteam/jpgraph": "^10.5",
+                "mpdf/mpdf": "^8.1.1",
+                "phpcompatibility/php-compatibility": "^9.3",
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+                "phpunit/phpunit": "^10.5",
+                "squizlabs/php_codesniffer": "^3.7",
+                "tecnickcom/tcpdf": "^6.5"
+            },
+            "suggest": {
+                "dompdf/dompdf": "Option for rendering PDF with PDF Writer",
+                "ext-intl": "PHP Internationalization Functions, required for NumberFormat Wizard and StringHelper::setLocale()",
+                "mitoteam/jpgraph": "Option for rendering charts, or including charts with PDF or HTML Writers",
+                "mpdf/mpdf": "Option for rendering PDF with PDF Writer",
+                "tecnickcom/tcpdf": "Option for rendering PDF with PDF Writer"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "PhpOffice\\PhpSpreadsheet\\": "src/PhpSpreadsheet"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
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+                    "homepage": "https://blog.maartenballiauw.be"
+                },
+                {
+                    "name": "Mark Baker",
+                    "homepage": "https://markbakeruk.net"
+                },
+                {
+                    "name": "Franck Lefevre",
+                    "homepage": "https://rootslabs.net"
+                },
+                {
+                    "name": "Erik Tilt"
+                },
+                {
+                    "name": "Adrien Crivelli"
+                },
+                {
+                    "name": "Owen Leibman"
+                }
+            ],
+            "description": "PHPSpreadsheet - Read, Create and Write Spreadsheet documents in PHP - Spreadsheet engine",
+            "homepage": "https://github.com/PHPOffice/PhpSpreadsheet",
+            "keywords": [
+                "OpenXML",
+                "excel",
+                "gnumeric",
+                "ods",
+                "php",
+                "spreadsheet",
+                "xls",
+                "xlsx"
+            ],
+            "support": {
+                "issues": "https://github.com/PHPOffice/PhpSpreadsheet/issues",
+                "source": "https://github.com/PHPOffice/PhpSpreadsheet/tree/5.7.0"
+            },
+            "time": "2026-04-20T02:42:17+00:00"
+        },
         {
             "name": "phpstan/phpdoc-parser",
             "version": "2.3.2",
@@ -3513,6 +3886,57 @@
             },
             "time": "2024-09-11T13:17:53+00:00"
         },
+        {
+            "name": "psr/simple-cache",
+            "version": "3.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/simple-cache.git",
+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865"
+            },
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+                "reference": "764e0b3939f5ca87cb904f570ef9be2d78a07865",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.0.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\SimpleCache\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "https://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interfaces for simple caching",
+            "keywords": [
+                "cache",
+                "caching",
+                "psr",
+                "psr-16",
+                "simple-cache"
+            ],
+            "support": {
+                "source": "https://github.com/php-fig/simple-cache/tree/3.0.0"
+            },
+            "time": "2021-10-29T13:26:27+00:00"
+        },
         {
             "name": "symfony/asset",
             "version": "v8.0.8",
@@ -8352,85 +8776,6 @@
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-        {
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-            "version": "3.3.2",
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-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/composer/pcre/zipball/b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
-                "reference": "b2bed4734f0cc156ee1fe9c0da2550420d99a21e",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.4 || ^8.0"
-            },
-            "conflict": {
-                "phpstan/phpstan": "<1.11.10"
-            },
-            "require-dev": {
-                "phpstan/phpstan": "^1.12 || ^2",
-                "phpstan/phpstan-strict-rules": "^1 || ^2",
-                "phpunit/phpunit": "^8 || ^9"
-            },
-            "type": "library",
-            "extra": {
-                "phpstan": {
-                    "includes": [
-                        "extension.neon"
-                    ]
-                },
-                "branch-alias": {
-                    "dev-main": "3.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Composer\\Pcre\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Jordi Boggiano",
-                    "email": "j.boggiano@seld.be",
-                    "homepage": "http://seld.be"
-                }
-            ],
-            "description": "PCRE wrapping library that offers type-safe preg_* replacements.",
-            "keywords": [
-                "PCRE",
-                "preg",
-                "regex",
-                "regular expression"
-            ],
-            "support": {
-                "issues": "https://github.com/composer/pcre/issues",
-                "source": "https://github.com/composer/pcre/tree/3.3.2"
-            },
-            "funding": [
-                {
-                    "url": "https://packagist.com",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/composer",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2024-11-12T16:29:46+00:00"
-        },
         {
             "name": "composer/xdebug-handler",
             "version": "3.0.5",
diff --git a/src/Module/Commercial/Domain/Repository/ClientRepositoryInterface.php b/src/Module/Commercial/Domain/Repository/ClientRepositoryInterface.php
index a3d6ca3..a5c43d7 100644
--- a/src/Module/Commercial/Domain/Repository/ClientRepositoryInterface.php
+++ b/src/Module/Commercial/Domain/Repository/ClientRepositoryInterface.php
@@ -18,6 +18,18 @@ interface ClientRepositoryInterface
      * - Exclut toujours les clients soft-deletes (deleted_at IS NOT NULL, RG-1.24).
      * - Exclut les archives sauf si $includeArchived = true (RG-1.25).
      * - Tri par defaut : companyName ASC (RG-1.26).
+     * - $search : recherche fuzzy insensible a la casse sur companyName +
+     *   lastName + email (metacaracteres LIKE echappes). Ignore si null/vide.
+     * - $categoryType : restreint aux clients possedant au moins une categorie
+     *   du type donne (code). Ignore si null/vide.
+     *
+     * Filtrage centralise ICI (et non dans les providers/controllers) pour que
+     * la liste paginee (ClientProvider) et l'export (ClientExportController)
+     * partagent strictement la meme logique de selection.
      */
-    public function createListQueryBuilder(bool $includeArchived = false): QueryBuilder;
+    public function createListQueryBuilder(
+        bool $includeArchived = false,
+        ?string $search = null,
+        ?string $categoryType = null,
+    ): QueryBuilder;
 }
diff --git a/src/Module/Commercial/Infrastructure/ApiPlatform/State/Provider/ClientProvider.php b/src/Module/Commercial/Infrastructure/ApiPlatform/State/Provider/ClientProvider.php
index f401375..8d7c640 100644
--- a/src/Module/Commercial/Infrastructure/ApiPlatform/State/Provider/ClientProvider.php
+++ b/src/Module/Commercial/Infrastructure/ApiPlatform/State/Provider/ClientProvider.php
@@ -11,8 +11,6 @@ use ApiPlatform\State\Pagination\Pagination;
 use ApiPlatform\State\ProviderInterface;
 use App\Module\Commercial\Domain\Entity\Client;
 use App\Module\Commercial\Domain\Repository\ClientRepositoryInterface;
-use Doctrine\ORM\EntityManagerInterface;
-use Doctrine\ORM\QueryBuilder;
 use Doctrine\ORM\Tools\Pagination\Paginator as DoctrinePaginator;
 use Symfony\Component\DependencyInjection\Attribute\Autowire;
 
@@ -46,7 +44,6 @@ final class ClientProvider implements ProviderInterface
         #[Autowire(service: 'App\Module\Commercial\Infrastructure\Doctrine\DoctrineClientRepository')]
         private readonly ClientRepositoryInterface $repository,
         private readonly Pagination $pagination,
-        private readonly EntityManagerInterface $em,
     ) {}
 
     public function provide(Operation $operation, array $uriVariables = [], array $context = []): Client|iterable|Paginator|null
@@ -67,10 +64,15 @@ final class ClientProvider implements ProviderInterface
     {
         $filters         = $context['filters'] ?? [];
         $includeArchived = $this->readBool($filters['includeArchived'] ?? false);
+        $search          = $filters['search'] ?? null;
+        $categoryType    = $filters['categoryType'] ?? null;
 
-        $qb = $this->repository->createListQueryBuilder($includeArchived);
-        $this->applySearch($qb, $filters['search'] ?? null);
-        $this->applyCategoryType($qb, $filters['categoryType'] ?? null);
+        // Filtrage delegue au repository (logique partagee avec l'export XLSX).
+        $qb = $this->repository->createListQueryBuilder(
+            $includeArchived,
+            is_string($search) ? $search : null,
+            is_string($categoryType) ? $categoryType : null,
+        );
 
         // Echappatoire ?pagination=false : collection complete sans Paginator
         // (cf. convention ERP-72 — utile pour un <select> cote front).
@@ -114,55 +116,6 @@ final class ClientProvider implements ProviderInterface
         return $client;
     }
 
-    /**
-     * Recherche fuzzy insensible a la casse sur companyName + lastName + email.
-     * Les metacaracteres LIKE (%, _, \) saisis sont echappes pour rester
-     * litteraux.
-     */
-    private function applySearch(QueryBuilder $qb, mixed $search): void
-    {
-        if (!is_string($search) || '' === trim($search)) {
-            return;
-        }
-
-        $escaped = str_replace(['\\', '%', '_'], ['\\\\', '\%', '\_'], trim($search));
-        $pattern = '%'.mb_strtolower($escaped, 'UTF-8').'%';
-
-        $qb->andWhere(
-            'LOWER(c.companyName) LIKE :search '
-            .'OR LOWER(c.lastName) LIKE :search '
-            .'OR LOWER(c.email) LIKE :search',
-        )->setParameter('search', $pattern);
-    }
-
-    /**
-     * Restreint aux clients possedant au moins une categorie du type donne.
-     * Sous-requete IN (plutot qu'un JOIN sur la collection M2M) pour ne pas
-     * perturber le DISTINCT / ORDER BY de la requete paginee principale.
-     */
-    private function applyCategoryType(QueryBuilder $qb, mixed $categoryType): void
-    {
-        if (!is_string($categoryType) || '' === trim($categoryType)) {
-            return;
-        }
-
-        // Sous-requete construite via l'EntityManager (et non
-        // $repository->createQueryBuilder()) : createQueryBuilder() n'est pas
-        // declaree sur ClientRepositoryInterface, l'appeler exposerait un detail
-        // d'implementation Doctrine hors du contrat (fuite d'abstraction).
-        $sub = $this->em->createQueryBuilder()
-            ->select('c2.id')
-            ->from(Client::class, 'c2')
-            ->join('c2.categories', 'cat2')
-            ->join('cat2.categoryType', 'ct2')
-            ->where('ct2.code = :categoryType')
-        ;
-
-        $qb->andWhere($qb->expr()->in('c.id', $sub->getDQL()))
-            ->setParameter('categoryType', trim($categoryType))
-        ;
-    }
-
     /**
      * Lit un flag booleen issu des query params. Accepte true / "true" / "1".
      */
diff --git a/src/Module/Commercial/Infrastructure/Controller/ClientExportController.php b/src/Module/Commercial/Infrastructure/Controller/ClientExportController.php
new file mode 100644
index 0000000..c8e494d
--- /dev/null
+++ b/src/Module/Commercial/Infrastructure/Controller/ClientExportController.php
@@ -0,0 +1,201 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Commercial\Infrastructure\Controller;
+
+use App\Module\Commercial\Domain\Entity\Client;
+use App\Module\Commercial\Domain\Repository\ClientRepositoryInterface;
+use App\Shared\Domain\Contract\CategoryInterface;
+use App\Shared\Domain\Contract\SiteInterface;
+use App\Shared\Domain\Contract\SpreadsheetExporterInterface;
+use DateTimeImmutable;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Attribute\AsController;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Security\Http\Attribute\IsGranted;
+
+/**
+ * Export XLSX du repertoire clients (M1, spec-back § 4.6).
+ *
+ * Controller Symfony custom (et non operation API Platform) car il produit un
+ * binaire de fichier, pas une representation Hydra. `priority: 1` est
+ * OBLIGATOIRE sur la route : sans cela API Platform capterait
+ * `/api/clients/export.xlsx` comme l'item `GET /api/clients/{id}.{_format}`
+ * (id="export", _format="xlsx") — cf. CLAUDE.md « controller custom sous /api ».
+ *
+ * Separation des responsabilites :
+ *  - le COMMENT (generation du fichier) est delegue au service Shared
+ *    {@see SpreadsheetExporterInterface} — generique, reutilisable, sans metier ;
+ *  - le QUOI vit ICI : selection des clients (memes filtres que
+ *    `GET /api/clients`, via {@see ClientRepositoryInterface::createListQueryBuilder()})
+ *    et mapping metier des colonnes.
+ *
+ * La colonne SIREN n'est ajoutee que si l'utilisateur a la permission
+ * `commercial.clients.accounting.view` (gating identique a la lecture).
+ */
+#[AsController]
+final class ClientExportController
+{
+    public function __construct(
+        #[Autowire(service: 'App\Module\Commercial\Infrastructure\Doctrine\DoctrineClientRepository')]
+        private readonly ClientRepositoryInterface $repository,
+        private readonly SpreadsheetExporterInterface $exporter,
+        private readonly Security $security,
+    ) {}
+
+    #[Route('/api/clients/export.xlsx', name: 'commercial_clients_export_xlsx', methods: ['GET'], priority: 1)]
+    #[IsGranted('commercial.clients.view')]
+    public function __invoke(Request $request): Response
+    {
+        $includeArchived = $this->readBool($request->query->get('includeArchived'));
+        $search          = $request->query->getString('search') ?: null;
+        $categoryType    = $request->query->getString('categoryType') ?: null;
+
+        /** @var list<Client> $clients */
+        $clients = $this->repository
+            ->createListQueryBuilder($includeArchived, $search, $categoryType)
+            ->getQuery()
+            ->getResult()
+        ;
+
+        $withSiren = $this->security->isGranted('commercial.clients.accounting.view');
+
+        $binary = $this->exporter->export(
+            'Répertoire clients',
+            $this->buildHeaders($withSiren),
+            $this->buildRows($clients, $withSiren),
+        );
+
+        return $this->buildResponse($binary);
+    }
+
+    /**
+     * Colonnes dans l'ordre impose par la spec § 4.6. SIREN inseree avant la
+     * date de creation, uniquement si l'utilisateur a accounting.view.
+     *
+     * @return list<string>
+     */
+    private function buildHeaders(bool $withSiren): array
+    {
+        $headers = [
+            'Nom entreprise',
+            'Nom contact principal',
+            'Prénom',
+            'Téléphone principal',
+            'Téléphone secondaire',
+            'Email',
+            'Catégories',
+            'Sites',
+        ];
+
+        if ($withSiren) {
+            $headers[] = 'SIREN';
+        }
+
+        $headers[] = 'Date de création';
+
+        return $headers;
+    }
+
+    /**
+     * @param list<Client> $clients
+     *
+     * @return iterable<list<null|scalar>>
+     */
+    private function buildRows(array $clients, bool $withSiren): iterable
+    {
+        foreach ($clients as $client) {
+            $row = [
+                $client->getCompanyName(),
+                $client->getLastName(),
+                $client->getFirstName(),
+                $client->getPhonePrimary(),
+                $client->getPhoneSecondary(),
+                $client->getEmail(),
+                $this->formatCategories($client),
+                $this->formatSites($client),
+            ];
+
+            if ($withSiren) {
+                $row[] = $client->getSiren();
+            }
+
+            $row[] = $client->getCreatedAt()?->format('d/m/Y');
+
+            yield $row;
+        }
+    }
+
+    /**
+     * Libelles des categories du client, dedupliques, tries, joints par virgule.
+     */
+    private function formatCategories(Client $client): string
+    {
+        $names = [];
+        foreach ($client->getCategories() as $category) {
+            // @var CategoryInterface $category
+            $name = $category->getName();
+            if (null !== $name && '' !== $name) {
+                $names[$name] = true;
+            }
+        }
+
+        return $this->joinSorted($names);
+    }
+
+    /**
+     * Le Client ne porte pas de sites en propre : ils sont rattaches aux
+     * adresses (RG-1.10). La colonne « Sites » agrege donc l'union distincte des
+     * sites de toutes les adresses du client (decision validee 01/06).
+     */
+    private function formatSites(Client $client): string
+    {
+        $names = [];
+        foreach ($client->getAddresses() as $address) {
+            foreach ($address->getSites() as $site) {
+                // @var SiteInterface $site
+                $name = $site->getName();
+                if (null !== $name && '' !== $name) {
+                    $names[$name] = true;
+                }
+            }
+        }
+
+        return $this->joinSorted($names);
+    }
+
+    /**
+     * @param array<string, true> $names ensemble de libelles (cles)
+     */
+    private function joinSorted(array $names): string
+    {
+        $list = array_keys($names);
+        sort($list);
+
+        return implode(', ', $list);
+    }
+
+    private function buildResponse(string $binary): Response
+    {
+        $filename = sprintf('repertoire-clients-%s.xlsx', new DateTimeImmutable()->format('Ymd'));
+
+        $response = new Response($binary);
+        $response->headers->set('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
+        $response->headers->set('Content-Disposition', sprintf('attachment; filename="%s"', $filename));
+
+        return $response;
+    }
+
+    /**
+     * Lit un flag booleen issu des query params. Accepte true / "true" / "1".
+     * Aligne sur ClientProvider pour un comportement identique a la liste.
+     */
+    private function readBool(mixed $raw): bool
+    {
+        return is_string($raw) && in_array(strtolower($raw), ['true', '1'], true);
+    }
+}
diff --git a/src/Module/Commercial/Infrastructure/Doctrine/DoctrineClientRepository.php b/src/Module/Commercial/Infrastructure/Doctrine/DoctrineClientRepository.php
index f10aff2..e810898 100644
--- a/src/Module/Commercial/Infrastructure/Doctrine/DoctrineClientRepository.php
+++ b/src/Module/Commercial/Infrastructure/Doctrine/DoctrineClientRepository.php
@@ -31,8 +31,11 @@ class DoctrineClientRepository extends ServiceEntityRepository implements Client
         $this->getEntityManager()->flush();
     }
 
-    public function createListQueryBuilder(bool $includeArchived = false): QueryBuilder
-    {
+    public function createListQueryBuilder(
+        bool $includeArchived = false,
+        ?string $search = null,
+        ?string $categoryType = null,
+    ): QueryBuilder {
         $qb = $this->createQueryBuilder('c')
             ->andWhere('c.deletedAt IS NULL')
             ->orderBy('c.companyName', 'ASC')
@@ -42,6 +45,54 @@ class DoctrineClientRepository extends ServiceEntityRepository implements Client
             $qb->andWhere('c.isArchived = false');
         }
 
+        $this->applySearch($qb, $search);
+        $this->applyCategoryType($qb, $categoryType);
+
         return $qb;
     }
+
+    /**
+     * Recherche fuzzy insensible a la casse sur companyName + lastName + email.
+     * Les metacaracteres LIKE (%, _, \) saisis sont echappes pour rester
+     * litteraux.
+     */
+    private function applySearch(QueryBuilder $qb, ?string $search): void
+    {
+        if (null === $search || '' === trim($search)) {
+            return;
+        }
+
+        $escaped = str_replace(['\\', '%', '_'], ['\\\\', '\%', '\_'], trim($search));
+        $pattern = '%'.mb_strtolower($escaped, 'UTF-8').'%';
+
+        $qb->andWhere(
+            'LOWER(c.companyName) LIKE :search '
+            .'OR LOWER(c.lastName) LIKE :search '
+            .'OR LOWER(c.email) LIKE :search',
+        )->setParameter('search', $pattern);
+    }
+
+    /**
+     * Restreint aux clients possedant au moins une categorie du type donne.
+     * Sous-requete IN (plutot qu'un JOIN sur la collection M2M) pour ne pas
+     * perturber le DISTINCT / ORDER BY de la requete principale.
+     */
+    private function applyCategoryType(QueryBuilder $qb, ?string $categoryType): void
+    {
+        if (null === $categoryType || '' === trim($categoryType)) {
+            return;
+        }
+
+        $sub = $this->getEntityManager()->createQueryBuilder()
+            ->select('c2.id')
+            ->from(Client::class, 'c2')
+            ->join('c2.categories', 'cat2')
+            ->join('cat2.categoryType', 'ct2')
+            ->where('ct2.code = :categoryType')
+        ;
+
+        $qb->andWhere($qb->expr()->in('c.id', $sub->getDQL()))
+            ->setParameter('categoryType', trim($categoryType))
+        ;
+    }
 }
diff --git a/src/Shared/Domain/Contract/SpreadsheetExporterInterface.php b/src/Shared/Domain/Contract/SpreadsheetExporterInterface.php
new file mode 100644
index 0000000..340353c
--- /dev/null
+++ b/src/Shared/Domain/Contract/SpreadsheetExporterInterface.php
@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Domain\Contract;
+
+/**
+ * Contrat d'export d'une feuille de calcul tabulaire vers un binaire XLSX.
+ *
+ * Service GENERIQUE et reutilisable : il ne connait aucune entite metier. Le
+ * module appelant decide QUOI exporter (en-tetes + lignes deja mappees) ; cette
+ * interface decrit seulement COMMENT produire le fichier. Aucun module n'est
+ * couple a une implementation concrete : on depend de ce contrat (dans Shared),
+ * jamais l'inverse (regle ABSOLUE n°1).
+ *
+ * Implementee par App\Shared\Infrastructure\Export\PhpSpreadsheetExporter (on
+ * ne la reference pas via @see pour ne pas creer un import Domain -> Infra).
+ */
+interface SpreadsheetExporterInterface
+{
+    /**
+     * Genere un classeur XLSX a une feuille et retourne son contenu binaire.
+     *
+     * @param string                      $sheetTitle titre de l'onglet (assaini / tronque par l'implementation si besoin)
+     * @param list<string>                $headers    libelles de la ligne d'en-tete (ligne 1)
+     * @param iterable<list<null|scalar>> $rows       lignes de donnees ; chaque ligne est une liste de cellules alignee sur $headers
+     *
+     * @return string contenu binaire du fichier XLSX
+     */
+    public function export(string $sheetTitle, array $headers, iterable $rows): string;
+}
diff --git a/src/Shared/Infrastructure/Export/PhpSpreadsheetExporter.php b/src/Shared/Infrastructure/Export/PhpSpreadsheetExporter.php
new file mode 100644
index 0000000..b479cb1
--- /dev/null
+++ b/src/Shared/Infrastructure/Export/PhpSpreadsheetExporter.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Shared\Infrastructure\Export;
+
+use App\Shared\Domain\Contract\SpreadsheetExporterInterface;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
+use RuntimeException;
+
+/**
+ * Implementation XLSX du contrat d'export via la librairie PhpSpreadsheet.
+ *
+ * Strictement technique : ecrit la ligne d'en-tete puis les lignes de donnees
+ * dans l'unique feuille du classeur, et retourne le binaire. Aucune logique
+ * metier, aucune reference a une entite d'un module — le mapping des colonnes
+ * est de la responsabilite de l'appelant.
+ */
+final class PhpSpreadsheetExporter implements SpreadsheetExporterInterface
+{
+    // Excel limite le titre d'un onglet a 31 caracteres et interdit certains
+    // caracteres ; on assainit pour ne jamais faire echouer setTitle().
+    private const int MAX_SHEET_TITLE_LENGTH = 31;
+    private const string INVALID_TITLE_CHARS = '*:/\?[]';
+
+    public function export(string $sheetTitle, array $headers, iterable $rows): string
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet       = $spreadsheet->getActiveSheet();
+        $sheet->setTitle($this->sanitizeSheetTitle($sheetTitle));
+
+        // Ligne 1 : en-tete.
+        $sheet->fromArray($headers, null, 'A1');
+
+        // Lignes 2..n : donnees. Iteration manuelle pour supporter un iterable
+        // paresseux (generator) sans tout materialiser en memoire.
+        $rowNumber = 2;
+        foreach ($rows as $row) {
+            $sheet->fromArray($row, null, 'A'.$rowNumber);
+            ++$rowNumber;
+        }
+
+        return $this->toBinary($spreadsheet);
+    }
+
+    private function toBinary(Spreadsheet $spreadsheet): string
+    {
+        $writer = new Xlsx($spreadsheet);
+
+        // Le writer ecrit vers un chemin de fichier : on passe par un fichier
+        // temporaire puis on lit son contenu binaire.
+        $tmpFile = tempnam(sys_get_temp_dir(), 'xlsx_export_');
+        if (false === $tmpFile) {
+            throw new RuntimeException('Impossible de creer un fichier temporaire pour l\'export XLSX.');
+        }
+
+        try {
+            $writer->save($tmpFile);
+            $binary = file_get_contents($tmpFile);
+            if (false === $binary) {
+                throw new RuntimeException('Lecture du fichier XLSX temporaire impossible.');
+            }
+
+            return $binary;
+        } finally {
+            // Libere les references internes de PhpSpreadsheet puis supprime le
+            // fichier temporaire, meme en cas d'exception.
+            $spreadsheet->disconnectWorksheets();
+            @unlink($tmpFile);
+        }
+    }
+
+    /**
+     * Retire les caracteres interdits et tronque a 31 caracteres ; renvoie un
+     * titre par defaut si la chaine resultante est vide.
+     */
+    private function sanitizeSheetTitle(string $title): string
+    {
+        $clean = str_replace(str_split(self::INVALID_TITLE_CHARS), '', $title);
+        $clean = mb_substr($clean, 0, self::MAX_SHEET_TITLE_LENGTH);
+
+        return '' === $clean ? 'Export' : $clean;
+    }
+}
diff --git a/tests/Module/Commercial/Api/ClientExportControllerTest.php b/tests/Module/Commercial/Api/ClientExportControllerTest.php
new file mode 100644
index 0000000..5707bcb
--- /dev/null
+++ b/tests/Module/Commercial/Api/ClientExportControllerTest.php
@@ -0,0 +1,185 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Module\Commercial\Api;
+
+use PhpOffice\PhpSpreadsheet\IOFactory;
+
+/**
+ * Tests fonctionnels de l'export XLSX du repertoire clients (M1, § 4.6).
+ *
+ * Couvre : reponse 200 (Content-Type + Content-Disposition), exclusion des
+ * archives par defaut, respect des filtres ?search / ?categoryType, gating de
+ * la colonne SIREN selon commercial.clients.accounting.view, 403 sans
+ * commercial.clients.view, 401 anonyme.
+ *
+ * @internal
+ */
+final class ClientExportControllerTest extends AbstractCommercialApiTestCase
+{
+    private const string XLSX_MIME  = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
+    private const string EXPORT_URL = '/api/clients/export.xlsx';
+
+    public function testExportReturnsXlsxResponseWithAttachmentFilename(): void
+    {
+        $client = $this->createAdminClient();
+        $this->seedClient('Export Alpha');
+
+        $response = $client->request('GET', self::EXPORT_URL);
+
+        self::assertResponseIsSuccessful();
+        $headers = $response->getHeaders(false);
+        self::assertStringContainsString(self::XLSX_MIME, $headers['content-type'][0] ?? '');
+
+        $disposition = $headers['content-disposition'][0] ?? '';
+        self::assertStringContainsString('attachment; filename="repertoire-clients-', $disposition);
+        self::assertMatchesRegularExpression(
+            '/filename="repertoire-clients-\d{8}\.xlsx"/',
+            $disposition,
+        );
+
+        // Le binaire est un XLSX relisible dont la 1re ligne porte les en-tetes.
+        $grid    = $this->gridFromResponse($response->getContent());
+        $headers = $grid[0];
+        self::assertSame('Nom entreprise', $headers[0]);
+        self::assertContains('Catégories', $headers);
+        self::assertContains('Sites', $headers);
+        self::assertContains('Date de création', $headers);
+    }
+
+    public function testExportExcludesArchivedByDefault(): void
+    {
+        $client = $this->createAdminClient();
+        $this->seedClient('Active One');
+        $this->seedClient('Archived One', true);
+
+        $names = $this->companyNames($client->request('GET', self::EXPORT_URL)->getContent());
+
+        self::assertContains('ACTIVE ONE', $names);
+        self::assertNotContains('ARCHIVED ONE', $names);
+    }
+
+    public function testExportRespectsSearchFilter(): void
+    {
+        $client = $this->createAdminClient();
+        $this->seedClient('Searchable Alpha');
+        $this->seedClient('Other Beta');
+
+        $names = $this->companyNames(
+            $client->request('GET', self::EXPORT_URL.'?search=alpha')->getContent(),
+        );
+
+        self::assertContains('SEARCHABLE ALPHA', $names);
+        self::assertNotContains('OTHER BETA', $names);
+    }
+
+    public function testExportRespectsCategoryTypeFilter(): void
+    {
+        $client = $this->createAdminClient();
+        $this->seedClient('Distrib Co', false, 'DISTRIBUTEUR');
+        $this->seedClient('Secteur Co', false, 'SECTEUR');
+
+        $names = $this->companyNames(
+            $client->request('GET', self::EXPORT_URL.'?categoryType=DISTRIBUTEUR')->getContent(),
+        );
+
+        self::assertContains('DISTRIB CO', $names);
+        self::assertNotContains('SECTEUR CO', $names);
+    }
+
+    public function testSirenColumnPresentWithAccountingView(): void
+    {
+        // L'admin bypass le RBAC : il a donc accounting.view -> colonne SIREN.
+        $client = $this->createAdminClient();
+        $seed   = $this->seedClient('Siren Co');
+        $em     = $this->getEm();
+        $seed->setSiren('123456789');
+        $em->flush();
+
+        $grid = $this->gridFromResponse($client->request('GET', self::EXPORT_URL)->getContent());
+
+        self::assertContains('SIREN', $grid[0]);
+        self::assertStringContainsString('123456789', $this->flatten($grid));
+    }
+
+    public function testSirenColumnAbsentWithoutAccountingView(): void
+    {
+        // Seed via admin, puis relecture par un user qui n'a QUE clients.view.
+        $admin = $this->createAdminClient();
+        $seed  = $this->seedClient('No Siren Co');
+        $em    = $this->getEm();
+        $seed->setSiren('987654321');
+        $em->flush();
+
+        $creds  = $this->createUserWithPermission('commercial.clients.view');
+        $viewer = $this->authenticatedClient($creds['username'], $creds['password']);
+
+        $grid = $this->gridFromResponse($viewer->request('GET', self::EXPORT_URL)->getContent());
+
+        self::assertNotContains('SIREN', $grid[0]);
+        self::assertStringNotContainsString('987654321', $this->flatten($grid));
+    }
+
+    public function testForbiddenWithoutClientsViewPermission(): void
+    {
+        $creds  = $this->createUserWithPermission('core.users.view');
+        $client = $this->authenticatedClient($creds['username'], $creds['password']);
+
+        $client->request('GET', self::EXPORT_URL);
+
+        self::assertResponseStatusCodeSame(403);
+    }
+
+    public function testUnauthorizedWhenAnonymous(): void
+    {
+        $client = self::createClient();
+        $client->request('GET', self::EXPORT_URL);
+
+        self::assertResponseStatusCodeSame(401);
+    }
+
+    /**
+     * Relit le binaire XLSX d'une reponse et renvoie la grille de cellules.
+     *
+     * @return array<int, array<int, mixed>>
+     */
+    private function gridFromResponse(string $binary): array
+    {
+        $tmp = tempnam(sys_get_temp_dir(), 'xlsx_export_test_');
+        self::assertIsString($tmp);
+        file_put_contents($tmp, $binary);
+
+        try {
+            return IOFactory::load($tmp)->getActiveSheet()->toArray();
+        } finally {
+            @unlink($tmp);
+        }
+    }
+
+    /**
+     * Extrait la colonne « Nom entreprise » (1re colonne) des lignes de donnees.
+     *
+     * @return list<string>
+     */
+    private function companyNames(string $binary): array
+    {
+        $grid = $this->gridFromResponse($binary);
+        $rows = array_slice($grid, 1); // saute l'en-tete
+
+        return array_values(array_map(static fn (array $row): string => (string) ($row[0] ?? ''), $rows));
+    }
+
+    /**
+     * Aplatit toute la grille en une chaine, pour les assertions de presence.
+     *
+     * @param array<int, array<int, mixed>> $grid
+     */
+    private function flatten(array $grid): string
+    {
+        return implode('|', array_map(
+            static fn (array $row): string => implode('|', array_map(static fn ($cell): string => (string) $cell, $row)),
+            $grid,
+        ));
+    }
+}
diff --git a/tests/Shared/Infrastructure/Export/PhpSpreadsheetExporterTest.php b/tests/Shared/Infrastructure/Export/PhpSpreadsheetExporterTest.php
new file mode 100644
index 0000000..74ca5de
--- /dev/null
+++ b/tests/Shared/Infrastructure/Export/PhpSpreadsheetExporterTest.php
@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Shared\Infrastructure\Export;
+
+use App\Shared\Infrastructure\Export\PhpSpreadsheetExporter;
+use Generator;
+use PhpOffice\PhpSpreadsheet\IOFactory;
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test unitaire du service Shared d'export XLSX. Verifie que le binaire produit
+ * est un vrai fichier XLSX relisible, que l'en-tete et les lignes sont ecrits
+ * dans le bon ordre, qu'un iterable paresseux (generator) est accepte et que le
+ * titre d'onglet est assaini.
+ *
+ * @internal
+ */
+final class PhpSpreadsheetExporterTest extends TestCase
+{
+    public function testExportProducesReadableXlsxWithHeadersAndRows(): void
+    {
+        $binary = new PhpSpreadsheetExporter()->export(
+            'Feuille test',
+            ['Nom', 'Email'],
+            [
+                ['Alpha', 'alpha@test.fr'],
+                ['Beta', null],
+            ],
+        );
+
+        self::assertNotSame('', $binary);
+        // Un fichier XLSX (OOXML) est une archive ZIP : signature "PK\x03\x04".
+        self::assertStringStartsWith("PK\x03\x04", $binary);
+
+        $grid = $this->grid($binary);
+        self::assertSame(['Nom', 'Email'], $grid[0]);
+        self::assertSame('Alpha', $grid[1][0]);
+        self::assertSame('alpha@test.fr', $grid[1][1]);
+        self::assertSame('Beta', $grid[2][0]);
+        // Cellule null a l'ecriture -> vide a la relecture.
+        self::assertNull($grid[2][1]);
+    }
+
+    public function testExportAcceptsGeneratorRows(): void
+    {
+        $rows = (static function (): Generator {
+            yield ['L1'];
+
+            yield ['L2'];
+        })();
+
+        $grid = $this->grid(new PhpSpreadsheetExporter()->export('Gen', ['H'], $rows));
+
+        self::assertSame('H', $grid[0][0]);
+        self::assertSame('L1', $grid[1][0]);
+        self::assertSame('L2', $grid[2][0]);
+    }
+
+    public function testLongOrInvalidSheetTitleIsSanitized(): void
+    {
+        // Titre > 31 caracteres + caracteres interdits par Excel ([ ] : * etc.).
+        $binary = new PhpSpreadsheetExporter()->export(
+            str_repeat('A', 50).'[]:*?/\\',
+            ['H'],
+            [['x']],
+        );
+
+        $title = $this->load($binary)->getActiveSheet()->getTitle();
+        self::assertLessThanOrEqual(31, mb_strlen($title));
+        self::assertStringNotContainsString('[', $title);
+        self::assertStringNotContainsString(':', $title);
+    }
+
+    /**
+     * Relit le binaire XLSX et renvoie la grille de cellules (ligne 0 = entete).
+     *
+     * @return array<int, array<int, mixed>>
+     */
+    private function grid(string $binary): array
+    {
+        return $this->load($binary)->getActiveSheet()->toArray();
+    }
+
+    private function load(string $binary): Spreadsheet
+    {
+        $tmp = tempnam(sys_get_temp_dir(), 'xlsx_test_');
+        self::assertIsString($tmp);
+        file_put_contents($tmp, $binary);
+
+        try {
+            return IOFactory::load($tmp);
+        } finally {
+            @unlink($tmp);
+        }
+    }
+}