Update tests for steering capability and send-path routing

Test drift surfaced by rebasing onto main:

- client SDK agent fixture now expects supportsSteering: false (the steering feature adds this capability flag, schema-defaulted).

- permission-response fake AgentManager gains startAgentRun, since the shared startAgentRun helper now routes through AgentManager.startAgentRun (the steer-vs-replace-vs-stream dispatch) instead of calling streamAgent/replaceAgentRun directly.

packages/client/src/index.test.ts

@@ -152,6 +152,7 @@ function createAgent(input: Partial<PaseoAgent> = {}): PaseoAgent {
       supportsRewindBoth: false,
       supportsRewindConversation: false,
       supportsRewindFiles: false,
+      supportsSteering: false,
       supportsToolInvocations: true,
     },
     currentModeId: null,

packages/server/src/server/agent/permission-response.test.ts

@@ -8,6 +8,7 @@ import type {
   AgentPermissionResponse,
 } from "./agent-sdk-types.js";
 import type { AgentStreamEvent } from "../messages.js";
+import type { StartAgentRunOptions, StartAgentRunResult } from "./agent-manager.js";
 import { respondToAgentPermission } from "./permission-response.js";
 
 class FakePermissionAgentManager {
@@ -61,6 +62,21 @@ class FakePermissionAgentManager {
     this.replacementRuns.push({ agentId, prompt, options });
     return emptyAgentStream();
   }
+
+  startAgentRun(
+    agentId: string,
+    prompt: AgentPromptInput,
+    options?: StartAgentRunOptions,
+  ): StartAgentRunResult {
+    if (this.tryRunOutOfBand()) {
+      return { outOfBand: true };
+    }
+    const shouldReplace = Boolean(options?.replaceRunning && this.hasInFlightRun());
+    const events = shouldReplace
+      ? this.replaceAgentRun(agentId, prompt, options?.runOptions)
+      : this.streamAgent(agentId, prompt, options?.runOptions);
+    return { outOfBand: false, events };
+  }
 }
 
 async function* emptyAgentStream(): AsyncGenerator<AgentStreamEvent> {}