more canvas implementation4

client/src/state/pages/add_table.rs

@@ -170,3 +170,41 @@ impl AddTableState {
         }
     }
 }
+
+impl DataProvider for AddTableState {
+    fn field_count(&self) -> usize {
+        3 // Table name, Column name, Column type
+    }
+
+    fn field_name(&self, index: usize) -> &str {
+        match index {
+            0 => "Table name",
+            1 => "Name",
+            2 => "Type",
+            _ => "",
+        }
+    }
+
+    fn field_value(&self, index: usize) -> &str {
+        match index {
+            0 => &self.table_name_input,
+            1 => &self.column_name_input,
+            2 => &self.column_type_input,
+            _ => "",
+        }
+    }
+
+    fn set_field_value(&mut self, index: usize, value: String) {
+        match index {
+            0 => self.table_name_input = value,
+            1 => self.column_name_input = value,
+            2 => self.column_type_input = value,
+            _ => {}
+        }
+        self.has_unsaved_changes = true;
+    }
+
+    fn supports_suggestions(&self, _field_index: usize) -> bool {
+        false // AddTableState doesn’t use suggestions
+    }
+}