feat(loyalty): add dedicated program edit page with full CRUD and tests

Add /admin/loyalty/merchants/{id}/program route for program configuration
with a dedicated Alpine.js edit page supporting create/edit/delete flows.
Restructure programs dashboard with create modal (merchant search +
duplicate detection) and delete confirmation. Rename "Loyalty Settings"
to "Admin Policy" for clearer separation of concerns.

Add integration tests for all admin page routes (12 tests) and program
list search/filter/pagination endpoints (9 tests).

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

app/modules/loyalty/static/admin/js/loyalty-programs.js

@@ -29,6 +29,17 @@ function adminLoyaltyPrograms() {
         loading: false,
         error: null,
 
+        // Delete modal state
+        showDeleteModal: false,
+        deletingProgram: null,
+
+        // Create program modal state
+        showCreateModal: false,
+        merchantSearch: '',
+        merchantResults: [],
+        selectedMerchant: null,
+        searchingMerchants: false,
+
         // Search and filters
         filters: {
             search: '',
@@ -246,6 +257,69 @@ function adminLoyaltyPrograms() {
             }
         },
 
+        // Delete program
+        confirmDeleteProgram(program) {
+            this.deletingProgram = program;
+            this.showDeleteModal = true;
+        },
+
+        async deleteProgram() {
+            if (!this.deletingProgram) return;
+            try {
+                await apiClient.delete(`/admin/loyalty/programs/${this.deletingProgram.id}`);
+                Utils.showToast('Program deleted successfully', 'success');
+                loyaltyProgramsLog.info('Program deleted:', this.deletingProgram.id);
+                this.showDeleteModal = false;
+                this.deletingProgram = null;
+                await Promise.all([this.loadPrograms(), this.loadStats()]);
+            } catch (error) {
+                Utils.showToast(`Failed to delete program: ${error.message}`, 'error');
+                loyaltyProgramsLog.error('Failed to delete program:', error);
+                this.showDeleteModal = false;
+                this.deletingProgram = null;
+            }
+        },
+
+        // Search merchants for create modal
+        searchMerchants() {
+            if (this._merchantSearchTimeout) {
+                clearTimeout(this._merchantSearchTimeout);
+            }
+            this.selectedMerchant = null;
+            this._merchantSearchTimeout = setTimeout(async () => {
+                if (!this.merchantSearch || this.merchantSearch.length < 2) {
+                    this.merchantResults = [];
+                    return;
+                }
+                this.searchingMerchants = true;
+                try {
+                    const params = new URLSearchParams();
+                    params.append('search', this.merchantSearch);
+                    params.append('limit', 10);
+                    const response = await apiClient.get(`/admin/merchants?${params}`);
+                    this.merchantResults = response.merchants || response || [];
+                    loyaltyProgramsLog.info(`Found ${this.merchantResults.length} merchants`);
+                } catch (error) {
+                    loyaltyProgramsLog.error('Merchant search failed:', error);
+                    this.merchantResults = [];
+                } finally {
+                    this.searchingMerchants = false;
+                }
+            }, 300);
+        },
+
+        // Check if a merchant already has a program in the loaded list
+        existingProgramForMerchant(merchantId) {
+            if (!merchantId) return false;
+            return this.programs.some(p => p.merchant_id === merchantId);
+        },
+
+        // Navigate to create program page for selected merchant
+        goToCreateProgram() {
+            if (!this.selectedMerchant) return;
+            window.location.href = `/admin/loyalty/merchants/${this.selectedMerchant.id}/program`;
+        },
+
         // Format date for display
         formatDate(dateString) {
             if (!dateString) return 'N/A';