feat: convert tmux monitoring into a plugin (B10)

plugins/tmux-monitor/tests/frontend/host-tmux-monitor.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, it } from "vitest";
+import { tmuxMonitorEnabled } from "../../src/frontend/host-tmux-monitor";
+
+describe("tmuxMonitorEnabled", () => {
+  it("is false when there is no pluginSettings", () => {
+    expect(tmuxMonitorEnabled(undefined)).toBe(false);
+    expect(
+      tmuxMonitorEnabled({ id: "1", name: "a", ip: "1.2.3.4", port: 22 }),
+    ).toBe(false);
+  });
+
+  it("is false when another plugin's settings are present but not this one's", () => {
+    expect(
+      tmuxMonitorEnabled({
+        id: "1",
+        name: "a",
+        ip: "1.2.3.4",
+        port: 22,
+        pluginSettings: { tunnels: { enableTunnel: true } },
+      }),
+    ).toBe(false);
+  });
+
+  it("is true only when enableTmuxMonitor is exactly true", () => {
+    expect(
+      tmuxMonitorEnabled({
+        id: "1",
+        name: "a",
+        ip: "1.2.3.4",
+        port: 22,
+        pluginSettings: { "tmux-monitor": { enableTmuxMonitor: true } },
+      }),
+    ).toBe(true);
+    expect(
+      tmuxMonitorEnabled({
+        id: "1",
+        name: "a",
+        ip: "1.2.3.4",
+        port: 22,
+        pluginSettings: { "tmux-monitor": { enableTmuxMonitor: "true" } },
+      }),
+    ).toBe(false);
+  });
+});