fix: add save session checkbox to run modal on scenarios list page

- add saveSessionFlag state to ScenariosPage
- pass saveSessionFlag to scenarios.run() call
- render save session checkbox in run modal when envs are available
- reset saveSessionFlag after scenario run completes

client/src/pages/scenario/ScenariosPage.tsx

@@ -29,6 +29,7 @@ export function ScenariosPage() {
   const [deleting, setDeleting] = useState(false);
   const [runScenarioId, setRunScenarioId] = useState<string | null>(null);
   const [running, setRunning] = useState(false);
+  const [saveSessionFlag, setSaveSessionFlag] = useState(false);
   const [envs, setEnvs] = useState<Environment[]>([]);
   const [selectedEnvId, setSelectedEnvId] = useState('');
 
@@ -59,10 +60,11 @@ export function ScenariosPage() {
     if (!runScenarioId || !selectedEnvId) return;
     setRunning(true);
     try {
-      const run = await scenarios.run(runScenarioId, selectedEnvId);
+      const run = await scenarios.run(runScenarioId, selectedEnvId, saveSessionFlag);
       toast.success('Scenario run started');
       navigate(`/scenarios/${runScenarioId}/runs/${run.id}`);
       setRunScenarioId(null);
+      setSaveSessionFlag(false);
     } catch (err) {
       toast.error((err as Error).message);
     } finally {
@@ -208,12 +210,23 @@ export function ScenariosPage() {
         {envs.length === 0 ? (
           <p>{t('scenarios.run_modal_no_env')}</p>
         ) : (
-          <Select
-            label={t('scenarios.run_modal_env_label')}
-            value={selectedEnvId}
-            onChange={(e) => setSelectedEnvId(e.target.value)}
-            options={envs.map((env) => ({ value: env.id, label: env.name }))}
-          />
+          <>
+            <Select
+              label={t('scenarios.run_modal_env_label')}
+              value={selectedEnvId}
+              onChange={(e) => setSelectedEnvId(e.target.value)}
+              options={envs.map((env) => ({ value: env.id, label: env.name }))}
+            />
+            <label style={{ display: 'flex', alignItems: 'center', marginTop: '1rem', gap: '0.5rem' }}>
+              <input
+                type="checkbox"
+                checked={saveSessionFlag}
+                onChange={(e) => setSaveSessionFlag(e.target.checked)}
+                disabled={running}
+              />
+              <span>Save session for explore mode</span>
+            </label>
+          </>
         )}
       </Modal>
     </div>