fix pipeline stop, jobs link navigation, and seed quote stripping

- Fix stop: abort poll now rejects the promise after killing the agent process
- Fix jobs link: close modal before navigating, use react-router navigate
- Fix seed parser: strip quotes from step input values (delete_source: "true")

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/servers/api/tasks/pipeline-executor.ts

@@ -124,9 +124,10 @@ async function runAgenticStep({ userId, email, username, role, taskDirName, prom
 
     // Poll for abort signal to kill the running agent
     const abortPoll = setInterval(() => {
-      if (abortSignal.aborted && cleanup) {
+      if (abortSignal.aborted) {
         clearInterval(abortPoll);
-        cleanup();
+        cleanup?.();
+        reject(new Error('Pipeline was stopped'));
       }
     }, 500);
 
@@ -157,11 +158,6 @@ async function runAgenticStep({ userId, email, username, role, taskDirName, prom
         sidecar.sendPiPrompt(sessionId, prompt, randomUUID());
       }
 
-      // If already aborted while setting up, kill immediately
-      if (abortSignal.aborted) {
-        clearInterval(abortPoll);
-        cleanup?.();
-      }
     } catch (err) {
       clearInterval(abortPoll);
       cleanup?.();