Fix set_flag blocks being dropped after trade_action

Bug: trade_order_generators.js set skipAdditionalParsing=true which
caused json_base_generator.js to return early before processing <next>
sibling blocks. This meant set_flag and other blocks connected after
trade_action were silently dropped from the JSON.

Fix: Removed the unnecessary skipAdditionalParsing flag. The code path
it was meant to protect was already in an else branch, so the flag
served no purpose and broke <next> block handling.

Also includes minor fixes to Strategies.js and backtesting.js from
earlier session work.

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

src/static/Strategies.js

@@ -1137,12 +1137,24 @@ class StratWorkspaceManager {
             this.workspace.clear();
             Blockly.Xml.domToWorkspace(workspaceXml, this.workspace);
         } catch (error) {
+            // Save the failed XML for debugging
+            const timestamp = new Date().toISOString().replace(/[:.]/g, '-');
+            const debugKey = `failed_strategy_xml_${timestamp}`;
+            try {
+                localStorage.setItem(debugKey, workspaceXmlText);
+                console.error(`Failed XML saved to localStorage as "${debugKey}"`);
+                console.error('To retrieve: localStorage.getItem("' + debugKey + '")');
+            } catch (e) {
+                // If localStorage fails, log to console
+                console.error('Failed workspace XML (copy for debugging):', workspaceXmlText);
+            }
+
             if (error instanceof SyntaxError) {
                 console.error('Syntax error in workspace XML:', error.message);
-                alert('There was a syntax error in the workspace data. Please check the data and try again.');
+                alert('There was a syntax error in the workspace data. Please check the data and try again.\n\nDebug XML saved to localStorage as: ' + debugKey);
             } else {
                 console.error('Unexpected error restoring workspace:', error);
-                alert('An unexpected error occurred while restoring the workspace.');
+                alert('An unexpected error occurred while restoring the workspace.\n\nDebug XML saved to localStorage as: ' + debugKey);
             }
         }
     }

src/static/backtesting.js

@@ -514,6 +514,12 @@ class Backtesting {
             this.setText(this.backtestDraggableHeader, "Create New Backtest");
             this.clearForm();
 
+            // Auto-select first strategy AFTER clearForm() to avoid being reset
+            const strategies = this.getAvailableStrategies();
+            if (strategies && strategies.length > 0) {
+                this.strategyDropdown.value = strategies[0].tbl_key;
+            }
+
             // Set default start_date to 1 hour ago
             const oneHourAgo = new Date(Date.now() - 60 * 60 * 1000); // Current time minus 1 hour
             const formattedDate = this.formatDateToLocalInput(oneHourAgo);

src/static/blocks/generators/trade_order_generators.js

@@ -78,9 +78,6 @@ export function defineTradeOrderGenerators() {
             }
         }
 
-        // **Set the skipAdditionalParsing flag**
-        json.skipAdditionalParsing = true;
-
         console.log(`Generated JSON for 'trade_action' block:`, json);
         return json;
     };