fix(pi): preserve non-terminal continuation guards

Keep the base Pi and Prime willContinue guard while settling terminal OMP events directly. Add regression coverage so sibling runtimes cannot publish a false completion after conflict resolution.

src/main/pi/agent-status-extension-omp-lifecycle.test.ts

@@ -86,4 +86,22 @@ describe('OMP agent_end contract', () => {
       vi.useRealTimers()
     }
   })
+
+  it('preserves non-terminal agent_end handling for Pi and Prime', async () => {
+    vi.useFakeTimers()
+    try {
+      for (const kind of ['pi', 'prime-agent'] as const) {
+        const harness = createAgentStatusExtensionHarness({ kind })
+        const context = { isIdle: vi.fn(() => true) }
+
+        await harness.callHook('agent_end', { willContinue: true }, context)
+        await vi.advanceTimersByTimeAsync(1_000)
+
+        expect(postedHookNames(harness.fetchMock)).toEqual([])
+        expect(context.isIdle).not.toHaveBeenCalled()
+      }
+    } finally {
+      vi.useRealTimers()
+    }
+  })
 })

src/main/pi/agent-status-handler-source.ts

@@ -171,8 +171,11 @@ export function getPiAgentStatusHandlerSourceLines(kind: PiAgentKind): string[]
     '',
     "  pi.on('agent_end', (event, ctx) => {",
     ...captureSessionMetadata,
+    '    if (event?.willContinue === true) {',
+    '      clearPendingAgentEndCheck()',
+    '      return',
+    '    }',
     '    if (isOmpRuntime()) {',
-    '      if (event?.willContinue === true) return',
     '      postAgentEndOnce()',
     '      return',
     '    }',