Allow SPA actions to redirect during loading phase

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

app/RSpade/Core/SPA/Spa.js

@@ -31,6 +31,9 @@ class Spa {
     // Flag to prevent re-entrant dispatch
     static is_dispatching = false;
 
+    // Pending redirect that occurred during dispatch (e.g., in action on_load)
+    static pending_redirect = null;
+
     /**
      * Framework module initialization hook called during framework boot
      * Only runs when window.rsxapp.is_spa === true
@@ -399,7 +402,10 @@ class Spa {
      */
     static async dispatch(url, options = {}) {
         if (Spa.is_dispatching) {
-            console.warn('Spa: Already dispatching, ignoring nested dispatch');
+            // Already dispatching - queue this as a pending redirect
+            // This commonly happens when an action redirects in on_load()
+            console_debug('Spa', 'Nested dispatch detected, queuing pending redirect: ' + url);
+            Spa.pending_redirect = { url, options };
             return;
         }
 
@@ -627,6 +633,18 @@ class Spa {
             throw error;
         } finally {
             Spa.is_dispatching = false;
+
+            // Check if a redirect was queued during this dispatch
+            if (Spa.pending_redirect) {
+                const redirect = Spa.pending_redirect;
+                Spa.pending_redirect = null;
+
+                console_debug('Spa', 'Processing pending redirect: ' + redirect.url);
+
+                // Execute the queued redirect immediately
+                // This will destroy the action that triggered the redirect
+                await Spa.dispatch(redirect.url, redirect.options);
+            }
         }
     }