feat: add Devis and BesoinInformatique modules

- Devis: CRUD complet, génération PDF (dompdf), paramètres (DevisSetting)
- BesoinInformatique: CRUD complet avec gestion matériels/licences
- Migrations pour les 3 nouvelles tables
- Navigation mise à jour dans AuthenticatedLayout

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

database/migrations/2026_06_17_075838_create_besoin_informatiques_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('besoin_informatiques', function (Blueprint $table) {
+            $table->id();
+            // Entête
+            $table->string('collectivite')->nullable();
+            $table->string('nom_referent')->nullable();
+            $table->text('descriptif_projet')->nullable();
+            
+            // Service Support et Relations Usagers
+            $table->json('materiels_support')->nullable(); // Liste PC / Portables / Ecran etc.
+            $table->json('licences_bureautique')->nullable(); // Liste Licences Bureautique
+            
+            // Infrastructures Système et Télécommunications
+            $table->text('equipements_reseaux')->nullable();
+            $table->text('cablage_reseau')->nullable();
+            $table->text('telephonie_ip')->nullable();
+            $table->text('nouveau_batiment')->nullable();
+            
+            // Etudes Projets et Dématérialisation
+            $table->text('logiciels_metiers')->nullable();
+            $table->json('licences_projets')->nullable(); // Liste Renouvellement ou achat
+            
+            // Validation
+            $table->date('date_validation')->nullable();
+            $table->string('validation_dgs')->nullable();
+
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('besoin_informatiques');
+    }
+};

database/migrations/2026_06_17_111413_create_devis_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('devis', function (Blueprint $table) {
+            $table->id();
+            $table->string('number')->unique();
+            $table->string('title');
+            $table->string('destinataire_type'); // 'commune', 'service_interne'
+            $table->string('destinataire_nom');
+            $table->string('referent')->nullable();
+            $table->date('date_devis');
+            $table->string('status')->default('draft'); // 'draft', 'sent', 'accepted', 'rejected'
+            $table->json('items')->nullable(); // details of items (type, designation, quantity, unit_price, total_price)
+            $table->decimal('total_ht', 15, 2)->default(0.00);
+            $table->decimal('tva_rate', 5, 2)->default(20.00);
+            $table->decimal('total_ttc', 15, 2)->default(0.00);
+            $table->text('notes')->nullable();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('devis');
+    }
+};

database/migrations/2026_06_17_113134_create_devis_settings_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('devis_settings', function (Blueprint $table) {
+            $table->id();
+            $table->string('entity_name')->default("Direction des Systèmes d'Information");
+            $table->string('entity_sub')->default("Communauté d'Agglomération Béziers Méditerranée");
+            $table->string('email')->default("support.informatique@beziers-mediterranee.fr");
+            $table->string('telephone')->default("04.67.01.60.00");
+            $table->string('adresse')->nullable()->default("Béziers, France");
+            $table->timestamps();
+        });
+
+        \DB::table('devis_settings')->insert([
+            'entity_name' => "Direction des Systèmes d'Information",
+            'entity_sub' => "Communauté d'Agglomération Béziers Méditerranée",
+            'email' => "support.informatique@beziers-mediterranee.fr",
+            'telephone' => "04.67.01.60.00",
+            'adresse' => "Béziers, France",
+            'created_at' => now(),
+            'updated_at' => now(),
+        ]);
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('devis_settings');
+    }
+};