Fix datagrid pagination, document rsx:debug --eval, update jqhtml

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

app/RSpade/man/rsx_debug.txt

@@ -168,15 +168,37 @@ LAYOUT DEBUGGING
 JAVASCRIPT EVALUATION
 
 --eval=<code>
-    Execute JavaScript code in the page context and display the result.
-    Useful for testing RSX JavaScript APIs or inspecting global state.
+    Execute JavaScript code in the page context AFTER the page has fully
+    loaded but BEFORE the DOM is captured for output. The code runs with
+    full access to jQuery, component APIs, and all page state.
 
-    Examples:
+    This is powerful for simulating user interactions and testing async
+    behavior. Use `await` for async operations and `await sleep(ms)` to
+    wait for side effects to complete before the DOM snapshot.
+
+    Simple examples:
         --eval="Rsx.Route('Demo_Controller').url()"
         --eval="JSON.stringify(Rsx._routes)"
         --eval="typeof jQuery"
         --eval="document.title"
 
+    Simulating user interactions:
+        # Click a pagination button and wait for results
+        --eval="$('.page-link[data-page=\"2\"]').click(); await sleep(2000)"
+
+        # Fill and submit a form
+        --eval="$('#search').val('test'); $('form').submit(); await sleep(1000)"
+
+        # Open a dropdown and click an option
+        --eval="$('.dropdown-toggle').click(); await sleep(100); $('.dropdown-item:first').click(); await sleep(500)"
+
+        # Toggle a checkbox and verify state change
+        --eval="$('#enable_feature').click(); await sleep(100); console.log('Checked:', $('#enable_feature').prop('checked'))"
+
+    The DOM output will reflect the state AFTER your eval code completes,
+    making this ideal for testing that UI updates correctly in response
+    to user actions.
+
 AUTHENTICATION & BACKDOOR
 
 The --user and --user-id options use backdoor authentication that only works
@@ -253,6 +275,14 @@ Debug layout issues by inspecting element dimensions:
     php artisan rsx:debug /page --dump-dimensions=".card,.sidebar" --dump-element=".main"
     # Shows .main HTML with data-dimensions on matching elements
 
+Test pagination or other interactive behavior:
+    php artisan rsx:debug /contacts --user=1 --eval="$('.page-link[data-page=\"2\"]').click(); await sleep(2000)" --console
+    # Clicks page 2, waits for Ajax, dumps DOM showing page 2 results
+
+Test form validation feedback:
+    php artisan rsx:debug /users/add --user=1 --eval="$('form').submit(); await sleep(500)" --dump-element=".invalid-feedback"
+    # Submits empty form, shows validation errors
+
 IMPORTANT NOTES
 
 • When using rsx:debug with grep and no output appears, re-run without grep