fix(web): restore missing brace in Tools tab HTMX-fallback path (#378)

The `else if (++tries > 100)` block added by #373 was missing its
closing `}`, leaving the setInterval arrow function syntactically
unclosed. This caused a JS parse error that silenced the entire
1400-line script block — including the EventSource setup — so the
connection-status indicator never left its default "Disconnected"
state for all users after updating.

Co-authored-by: Chuck <chuck@example.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

web_interface/templates/v3/base.html

@@ -1938,6 +1938,7 @@
                                         contentEl.innerHTML = '<div class="bg-red-50 border border-red-200 rounded-lg p-4"><p class="text-red-800">Failed to load Tools. Please refresh the page.</p></div>';
                                     });
                             }
+                        }
                     }, 100);
                 },