feat: integer cents money handling, order page fixes, and vendor filter persistence

Money Handling Architecture:
- Store all monetary values as integer cents (€105.91 = 10591)
- Add app/utils/money.py with Money class and conversion helpers
- Add static/shared/js/money.js for frontend formatting
- Update all database models to use _cents columns (Product, Order, etc.)
- Update CSV processor to convert prices to cents on import
- Add Alembic migration for Float to Integer conversion
- Create .architecture-rules/money.yaml with 7 validation rules
- Add docs/architecture/money-handling.md documentation

Order Details Page Fixes:
- Fix customer name showing 'undefined undefined' - use flat field names
- Fix vendor info empty - add vendor_name/vendor_code to OrderDetailResponse
- Fix shipping address using wrong nested object structure
- Enrich order detail API response with vendor info

Vendor Filter Persistence Fixes:
- Fix orders.js: restoreSavedVendor now sets selectedVendor and filters
- Fix orders.js: init() only loads orders if no saved vendor to restore
- Fix marketplace-letzshop.js: restoreSavedVendor calls selectVendor()
- Fix marketplace-letzshop.js: clearVendorSelection clears TomSelect dropdown
- Align vendor selector placeholder text between pages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/admin/js/settings.js

@@ -30,11 +30,19 @@ function adminSettings() {
             in_app_enabled: true,
             critical_only: false
         },
+        shippingSettings: {
+            carrier_greco_label_url: 'https://dispatchweb.fr/Tracky/Home/',
+            carrier_colissimo_label_url: '',
+            carrier_xpresslogistics_label_url: ''
+        },
 
         async init() {
             try {
                 settingsLog.info('=== SETTINGS PAGE INITIALIZING ===');
-                await this.loadLogSettings();
+                await Promise.all([
+                    this.loadLogSettings(),
+                    this.loadShippingSettings()
+                ]);
             } catch (error) {
                 settingsLog.error('Init failed:', error);
                 this.error = 'Failed to initialize settings page';
@@ -44,7 +52,10 @@ function adminSettings() {
         async refresh() {
             this.error = null;
             this.successMessage = null;
-            await this.loadLogSettings();
+            await Promise.all([
+                this.loadLogSettings(),
+                this.loadShippingSettings()
+            ]);
         },
 
         async loadLogSettings() {
@@ -136,6 +147,75 @@ function adminSettings() {
             } finally {
                 this.saving = false;
             }
+        },
+
+        async loadShippingSettings() {
+            try {
+                // Load each carrier setting
+                const carriers = ['greco', 'colissimo', 'xpresslogistics'];
+                for (const carrier of carriers) {
+                    try {
+                        const key = `carrier_${carrier}_label_url`;
+                        const data = await apiClient.get(`/admin/settings/${key}`);
+                        if (data && data.value) {
+                            this.shippingSettings[key] = data.value;
+                        }
+                    } catch (error) {
+                        // Setting doesn't exist yet, use default
+                        settingsLog.debug(`Setting carrier_${carrier}_label_url not found, using default`);
+                    }
+                }
+                settingsLog.info('Shipping settings loaded:', this.shippingSettings);
+            } catch (error) {
+                settingsLog.error('Failed to load shipping settings:', error);
+                // Don't show error for missing settings, just use defaults
+            }
+        },
+
+        async saveShippingSettings() {
+            this.saving = true;
+            this.error = null;
+            this.successMessage = null;
+
+            try {
+                // Save each carrier setting using upsert
+                const carriers = [
+                    { key: 'carrier_greco_label_url', name: 'Greco' },
+                    { key: 'carrier_colissimo_label_url', name: 'Colissimo' },
+                    { key: 'carrier_xpresslogistics_label_url', name: 'XpressLogistics' }
+                ];
+
+                for (const carrier of carriers) {
+                    await apiClient.post('/admin/settings/upsert', {
+                        key: carrier.key,
+                        value: this.shippingSettings[carrier.key] || '',
+                        category: 'shipping',
+                        value_type: 'string',
+                        description: `Label URL prefix for ${carrier.name} carrier`
+                    });
+                }
+
+                this.successMessage = 'Shipping settings saved successfully';
+
+                // Auto-hide success message after 5 seconds
+                setTimeout(() => {
+                    this.successMessage = null;
+                }, 5000);
+
+                settingsLog.info('Shipping settings saved:', this.shippingSettings);
+            } catch (error) {
+                settingsLog.error('Failed to save shipping settings:', error);
+                this.error = error.response?.data?.detail || 'Failed to save shipping settings';
+            } finally {
+                this.saving = false;
+            }
+        },
+
+        getShippingLabelUrl(carrier, shipmentNumber) {
+            // Helper to generate full label URL
+            const prefix = this.shippingSettings[`carrier_${carrier}_label_url`] || '';
+            if (!prefix || !shipmentNumber) return null;
+            return prefix + shipmentNumber;
         }
     };
 }