refactor(tests): move backend tests into src/backend/tests mirror tree

Backend *.test.ts files (and the test-support harness) no longer sit next
to source files; they live under src/backend/tests/ mirroring the source
layout. Imports rewritten accordingly; CLAUDE.md convention updated.

src/backend/tests/database/routes/host-bulk-routes.test.ts

@@ -0,0 +1,104 @@
+import { describe, it, expect } from "vitest";
+import { parseSSHConfig } from "../../../database/routes/host-bulk-routes.js";
+
+describe("parseSSHConfig", () => {
+  it("parses a basic Host block", () => {
+    const config = `
+Host myserver
+    HostName 192.168.1.10
+    User alice
+    Port 2222
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(1);
+    expect(result[0]).toMatchObject({
+      name: "myserver",
+      hostname: "192.168.1.10",
+      user: "alice",
+      port: 2222,
+    });
+  });
+
+  it("parses multiple Host blocks", () => {
+    const config = `
+Host web
+    HostName web.example.com
+    User deploy
+
+Host db
+    HostName db.example.com
+    User postgres
+    Port 5432
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(2);
+    expect(result[0].name).toBe("web");
+    expect(result[1].name).toBe("db");
+    expect(result[1].port).toBe(5432);
+  });
+
+  it("ignores comment lines", () => {
+    const config = `
+# This is a comment
+Host server
+    # Another comment
+    HostName 10.0.0.1
+    User root
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(1);
+    expect(result[0].hostname).toBe("10.0.0.1");
+  });
+
+  it("skips wildcard Host entries", () => {
+    const config = `
+Host *
+    ServerAliveInterval 60
+
+Host prod
+    HostName prod.example.com
+    User ubuntu
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(1);
+    expect(result[0].name).toBe("prod");
+  });
+
+  it("captures IdentityFile and ProxyJump", () => {
+    const config = `
+Host bastion
+    HostName bastion.example.com
+    User ec2-user
+    IdentityFile ~/.ssh/id_rsa
+    ProxyJump jumphost.example.com
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(1);
+    expect(result[0].identityFile).toBe("~/.ssh/id_rsa");
+    expect(result[0].proxyJump).toBe("jumphost.example.com");
+  });
+
+  it("skips Host blocks without a HostName", () => {
+    const config = `
+Host alias-only
+    User foo
+`;
+    const result = parseSSHConfig(config);
+    expect(result).toHaveLength(0);
+  });
+
+  it("defaults port to undefined when not specified", () => {
+    const config = `
+Host server
+    HostName 1.2.3.4
+    User root
+`;
+    const result = parseSSHConfig(config);
+    expect(result[0].port).toBeUndefined();
+  });
+
+  it("returns empty array for empty input", () => {
+    expect(parseSSHConfig("")).toHaveLength(0);
+    expect(parseSSHConfig("   \n\n  ")).toHaveLength(0);
+  });
+});