feat: Refactor event equipment management with advanced selection and conflict detection

This commit introduces a complete overhaul of how equipment is assigned to events, focusing on an enhanced user experience, advanced selection capabilities, and robust conflict detection.

**Key Features & Enhancements:**

-   **Advanced Equipment Selection UI (`EquipmentSelectionDialog`):**
    -   New full-screen dialog to select equipment and containers ("boîtes") for an event.
    -   Hierarchical view showing containers and a flat list of all individual equipment.
    -   Real-time search and filtering by equipment category.
    -   Side panel summarizing the current selection and providing recommendations for containers based on selected equipment.
    -   Supports quantity selection for consumables and cables.

-   **Conflict Detection & Management (`EventAvailabilityService`):**
    -   A new service (`EventAvailabilityService`) checks for equipment availability against other events based on the selected date range.
    -   The selection dialog visually highlights equipment and containers with scheduling conflicts (e.g., already used, partially unavailable).
    -   A dedicated conflict resolution dialog (`EquipmentConflictDialog`) appears if conflicting items are selected, allowing the user to either remove them or force the assignment.

-   **Integrated Event Form (`EventAssignedEquipmentSection`):**
    -   The event creation/editing form now includes a new section for managing assigned equipment.
    -   It clearly displays assigned containers and standalone equipment, showing the composition of each container.
    -   Integrates the new selection dialog, ensuring all assignments are checked for conflicts before being saved.

-   **Event Preparation & Return Workflow (`EventPreparationPage`):**
    -   New page (`EventPreparationPage`) for managing the check-out (preparation) and check-in (return) of equipment for an event.
    -   Provides a checklist of all assigned equipment.
    -   Users can validate each item, with options to "validate all" or finalize with missing items.
    -   Includes a dialog (`MissingEquipmentDialog`) to handle discrepancies.
    -   Supports tracking returned quantities for consumables.

**Data Model and Other Changes:**

-   The `EventModel` now includes `assignedContainers` to explicitly link containers to an event.
-   `EquipmentAssociatedEventsSection` on the equipment detail page is now functional, displaying current, upcoming, and past events for that item.
-   Added deployment and versioning scripts (`scripts/deploy.js`, `scripts/increment_version.js`, `scripts/toggle_env.js`) to automate the release process.
-   Introduced an application version display in the main drawer (`AppVersion`).

em2rp/scripts/increment_version.js

@@ -0,0 +1,59 @@
+#!/usr/bin/env node
+
+/**
+ * Script pour incrémenter automatiquement le numéro de version patch
+ * lors du déploiement Firebase Hosting
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const VERSION_FILE = path.join(__dirname, '../lib/config/app_version.dart');
+
+function incrementVersion() {
+  try {
+    // Lire le fichier
+    let content = fs.readFileSync(VERSION_FILE, 'utf8');
+
+    // Extraire la version actuelle
+    const versionRegex = /static const String version = '(\d+)\.(\d+)\.(\d+)';/;
+    const match = content.match(versionRegex);
+
+    if (!match) {
+      console.error('❌ Impossible de trouver la version dans le fichier');
+      process.exit(1);
+    }
+
+    const major = parseInt(match[1]);
+    const minor = parseInt(match[2]);
+    const patch = parseInt(match[3]);
+
+    // Incrémenter le patch
+    const newPatch = patch + 1;
+    const newVersion = `${major}.${minor}.${newPatch}`;
+
+    // Remplacer dans le fichier
+    const newContent = content.replace(
+      versionRegex,
+      `static const String version = '${newVersion}';`
+    );
+
+    // Écrire le fichier
+    fs.writeFileSync(VERSION_FILE, newContent, 'utf8');
+
+    console.log(`✅ Version incrémentée: ${match[0].match(/\d+\.\d+\.\d+/)[0]} → ${newVersion}`);
+
+    return newVersion;
+  } catch (error) {
+    console.error('❌ Erreur lors de l\'incrémentation:', error.message);
+    process.exit(1);
+  }
+}
+
+// Exécuter si appelé directement
+if (require.main === module) {
+  incrementVersion();
+}
+
+module.exports = { incrementVersion };
+