Fix: Add missing printing module table and improve database management error handling

- Added order_for_labels table to init_db.py (printing/labels module)
- Fixed fetch API calls in database management to properly check HTTP response status before parsing JSON
- Prevents 'Unexpected token' errors when server returns HTML error pages instead of JSON
- Improved error messages for better debugging (shows HTTP status codes)
- All 10 database management API endpoints now have proper error handling

app/templates/modules/settings/database_management.html

@@ -477,7 +477,10 @@ document.addEventListener('DOMContentLoaded', function() {
                         'Content-Type': 'application/json'
                     }
                 })
-                .then(response => response.json())
+                .then(response => {
+                    if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+                    return response.json();
+                })
                 .then(data => {
                     if (data.success) {
                         alert('Cleanup completed! ' + (data.deleted_count || 0) + ' old backups deleted.');
@@ -512,7 +515,10 @@ document.addEventListener('DOMContentLoaded', function() {
             method: 'POST',
             body: formData
         })
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+            return response.json();
+        })
         .then(data => {
             if (data.success) {
                 alert('Backup created successfully: ' + data.file);
@@ -677,7 +683,15 @@ document.addEventListener('DOMContentLoaded', function() {
                 },
                 body: JSON.stringify({ table: table })
             })
-            .then(response => response.json())
+            .then(response => {
+                if (!response.ok) {
+                    if (response.status === 401) {
+                        throw new Error('Unauthorized. Please log in again.');
+                    }
+                    throw new Error(`HTTP error! status: ${response.status}`);
+                }
+                return response.json();
+            })
             .then(data => {
                 if (data.success) {
                     // Hide modal
@@ -701,16 +715,16 @@ document.addEventListener('DOMContentLoaded', function() {
                 } else {
                     alert('Error: ' + data.error);
                     // Re-enable button
-                    this.disabled = false;
+                    confirmBtn.disabled = false;
-                    this.innerHTML = '<i class="fas fa-trash"></i> Yes, Clear All Data';
+                    confirmBtn.innerHTML = '<i class="fas fa-trash"></i> Yes, Clear All Data';
                 }
             })
             .catch(error => {
                 console.error('Error:', error);
-                alert('Error clearing table: ' + error);
+                alert('Error clearing table: ' + error.message);
                 // Re-enable button
-                this.disabled = false;
+                confirmBtn.disabled = false;
-                this.innerHTML = '<i class="fas fa-trash"></i> Yes, Clear All Data';
+                confirmBtn.innerHTML = '<i class="fas fa-trash"></i> Yes, Clear All Data';
             });
         });
     }
@@ -739,7 +753,10 @@ document.addEventListener('DOMContentLoaded', function() {
                 },
                 body: JSON.stringify({ backup: backup })
             })
-            .then(response => response.json())
+            .then(response => {
+                if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+                return response.json();
+            })
             .then(data => {
                 if (data.success) {
                     alert('Database restored successfully!');
@@ -758,7 +775,10 @@ document.addEventListener('DOMContentLoaded', function() {
 
 function loadBackupsList() {
     fetch('{{ url_for("settings.get_backups_list") }}')
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+            return response.json();
+        })
         .then(data => {
             if (data.backups && data.backups.length > 0) {
                 const tbody = document.getElementById('backups-list');
@@ -837,7 +857,10 @@ function toggleDayOfWeek() {
 
 function loadBackupSchedules() {
     fetch('{{ url_for("settings.get_backup_schedules") }}')
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+            return response.json();
+        })
         .then(data => {
             const tbody = document.getElementById('schedules-list');
             
@@ -925,7 +948,10 @@ function saveBackupSchedule() {
         },
         body: JSON.stringify(payload)
     })
-    .then(response => response.json())
+    .then(response => {
+        if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+        return response.json();
+    })
     .then(data => {
         if (data.success) {
             alert('Backup schedule created successfully!');
@@ -949,7 +975,10 @@ function deleteSchedule(scheduleId) {
                 'Content-Type': 'application/json'
             }
         })
-        .then(response => response.json())
+        .then(response => {
+            if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+            return response.json();
+        })
         .then(data => {
             if (data.success) {
                 alert('Schedule deleted successfully!');
@@ -972,7 +1001,10 @@ function toggleSchedule(scheduleId) {
             'Content-Type': 'application/json'
         }
     })
-    .then(response => response.json())
+    .then(response => {
+        if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+        return response.json();
+    })
     .then(data => {
         if (data.success) {
             loadBackupSchedules();
@@ -1010,7 +1042,10 @@ function uploadBackupFile() {
         method: 'POST',
         body: formData
     })
-    .then(response => response.json())
+    .then(response => {
+        if (!response.ok) throw new Error(`HTTP error! status: ${response.status}`);
+        return response.json();
+    })
     .then(data => {
         if (data.success) {
             statusDiv.innerHTML = '<div class="alert alert-success"><i class="fas fa-check-circle"></i> File uploaded successfully: ' + data.filename + ' (' + data.size + ' bytes)</div>';

init_db.py

@@ -408,6 +408,31 @@ def create_tables():
             ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
         """, description="Table 'cp_location_history'")
         
+        # Order For Labels table (for printing module)
+        execute_sql(conn, """
+            CREATE TABLE IF NOT EXISTS order_for_labels (
+                id BIGINT AUTO_INCREMENT PRIMARY KEY,
+                comanda_productie VARCHAR(50) NOT NULL,
+                cod_articol VARCHAR(50),
+                descr_com_prod TEXT,
+                cantitate DECIMAL(10, 2),
+                com_achiz_client VARCHAR(50),
+                nr_linie_com_client VARCHAR(50),
+                customer_name VARCHAR(255),
+                customer_article_number VARCHAR(100),
+                open_for_order TINYINT(1) DEFAULT 1,
+                line_number INT,
+                printed_labels TINYINT(1) DEFAULT 0,
+                data_livrare DATE,
+                dimensiune VARCHAR(50),
+                created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+                updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+                INDEX idx_comanda_productie (comanda_productie),
+                INDEX idx_printed_labels (printed_labels),
+                INDEX idx_created_at (created_at)
+            ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+        """, description="Table 'order_for_labels'")
+        
         conn.commit()
         conn.close()
         logger.info("✓ All tables created successfully")