feat(FN-3580): restore canonical agent lifecycle and remove terminated agen

This merge restores the canonical agent lifecycle with termination scoped at the run level (FN-3580, 4 steps), adds sender-side wake recipient override for messages, and introduces test isolation CI enforcement with a stuck-requeue race fix. UI changes remove terminated-agent indicators from AgentDe

Fusion-Task-Id: FN-3580

packages/cli/src/commands/__tests__/agent.test.ts

@@ -16,11 +16,10 @@ vi.mock("@fusion/core", () => ({
   })),
   AGENT_VALID_TRANSITIONS: {
     idle: ["active"],
-    active: ["running", "paused", "terminated"],
-    running: ["active", "paused", "error", "terminated"],
-    paused: ["active", "terminated"],
-    error: ["active", "terminated"],
-    terminated: ["idle", "active", "running"],
+    active: ["running", "paused"],
+    running: ["active", "paused", "error"],
+    paused: ["active"],
+    error: ["active"],
   },
 }));
 
@@ -124,14 +123,6 @@ describe("runAgentStop", () => {
     expect(errorSpy).toHaveBeenCalledWith(expect.stringContaining("cannot transition to 'paused'"));
     expect(exitSpy).toHaveBeenCalledWith(1);
   });
-
-  it("should reject stopping a terminated agent (invalid transition)", async () => {
-    mockGetAgent.mockResolvedValue(makeAgent("terminated"));
-
-    await expect(runAgentStop("agent-test123")).rejects.toThrow("process.exit");
-    expect(errorSpy).toHaveBeenCalledWith(expect.stringContaining("cannot transition to 'paused'"));
-    expect(exitSpy).toHaveBeenCalledWith(1);
-  });
 });
 
 describe("runAgentStart", () => {
@@ -152,16 +143,6 @@ describe("runAgentStart", () => {
     expect(logSpy).toHaveBeenCalledWith(expect.stringContaining("✓ Agent agent-test123 started"));
   });
 
-  it("should start a terminated agent", async () => {
-    mockGetAgent.mockResolvedValue(makeAgent("terminated"));
-    mockUpdateAgentState.mockResolvedValue(makeAgent("active"));
-
-    await runAgentStart("agent-test123");
-
-    expect(mockUpdateAgentState).toHaveBeenCalledWith("agent-test123", "active");
-    expect(logSpy).toHaveBeenCalledWith(expect.stringContaining("✓ Agent agent-test123 started"));
-  });
-
   it("should start an idle agent", async () => {
     mockGetAgent.mockResolvedValue(makeAgent("idle"));
     mockUpdateAgentState.mockResolvedValue(makeAgent("active"));

packages/cli/src/commands/__tests__/init.test.ts

@@ -52,14 +52,12 @@ async function git(command: string, cwd: string): Promise<string> {
 describe("init command", () => {
   let tempProjectDir: string;
   let tempHomeDir: string;
-  let originalHome: string | undefined;
-  let originalUserProfile: string | undefined;
+  const isolatedHome = process.env.HOME;
+  const isolatedUserProfile = process.env.USERPROFILE;
 
   beforeEach(() => {
     tempProjectDir = tempDir("fn-init-test-");
     tempHomeDir = tempDir("fn-init-home-");
-    originalHome = process.env.HOME;
-    originalUserProfile = process.env.USERPROFILE;
     process.env.HOME = tempHomeDir;
     process.env.USERPROFILE = tempHomeDir;
     mockCentralInit.mockResolvedValue(undefined);
@@ -81,15 +79,15 @@ describe("init command", () => {
   });
 
   afterEach(() => {
-    if (originalHome === undefined) {
+    if (isolatedHome === undefined) {
       delete process.env.HOME;
     } else {
-      process.env.HOME = originalHome;
+      process.env.HOME = isolatedHome;
     }
-    if (originalUserProfile === undefined) {
+    if (isolatedUserProfile === undefined) {
       delete process.env.USERPROFILE;
     } else {
-      process.env.USERPROFILE = originalUserProfile;
+      process.env.USERPROFILE = isolatedUserProfile;
     }
 
     if (existsSync(tempProjectDir)) {

packages/cli/src/extension.ts

@@ -2227,7 +2227,7 @@ export default function kbExtension(pi: ExtensionAPI) {
     promptGuidelines: [
       "Use to pause an agent that is currently running or active",
       "Stopped agents can be resumed with fn_agent_start",
-      "Agents in 'idle', 'error', or 'terminated' state cannot be stopped",
+      "Agents in 'idle', 'error', or already-paused state cannot be stopped",
     ],
     parameters: Type.Object({
       id: Type.String({ description: "Agent ID to stop (e.g., agent-abc123)" }),