test: add semver and gateway helpers coverage

apps/macos/Sources/Clawdis/GatewayEnvironment.swift

@@ -71,6 +71,11 @@ enum GatewayEnvironment {
         return Semver.parse(bundleVersion)
     }
 
+    // Exposed for tests so we can inject fake version checks without rewriting bundle metadata.
+    static func expectedGatewayVersion(from versionString: String?) -> Semver? {
+        Semver.parse(versionString)
+    }
+
     static func check() -> GatewayEnvironmentStatus {
         let expected = self.expectedGatewayVersion()
         let projectRoot = CommandResolver.projectRoot()

apps/macos/Tests/ClawdisIPCTests/GatewayEnvironmentTests.swift

@@ -27,4 +27,9 @@ import Testing
         defer { UserDefaults.standard.removeObject(forKey: "gatewayPort") }
         #expect(GatewayEnvironment.gatewayPort() == 19999)
     }
+
+    @Test func expectedGatewayVersionFromStringUsesParser() {
+        #expect(GatewayEnvironment.expectedGatewayVersion(from: "v9.1.2") == Semver(major: 9, minor: 1, patch: 2))
+        #expect(GatewayEnvironment.expectedGatewayVersion(from: nil) == nil)
+    }
 }

apps/macos/Tests/ClawdisIPCTests/SemverTests.swift

@@ -0,0 +1,21 @@
+import Testing
+@testable import Clawdis
+
+@Suite struct SemverTests {
+    @Test func comparisonOrdersByMajorMinorPatch() {
+        let a = Semver(major: 1, minor: 0, patch: 0)
+        let b = Semver(major: 1, minor: 1, patch: 0)
+        let c = Semver(major: 1, minor: 1, patch: 1)
+        let d = Semver(major: 2, minor: 0, patch: 0)
+
+        #expect(a < b)
+        #expect(b < c)
+        #expect(c < d)
+        #expect(d > a)
+    }
+
+    @Test func descriptionMatchesParts() {
+        let v = Semver(major: 3, minor: 2, patch: 1)
+        #expect(v.description == "3.2.1")
+    }
+}

apps/macos/Tests/ClawdisIPCTests/UtilitiesTests.swift

@@ -77,4 +77,10 @@ import Testing
         try? fm.removeItem(at: older)
         try? fm.removeItem(at: newer)
     }
+
+    @Test func gatewayEntrypointNilWhenMissing() {
+        let tmp = URL(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true)
+            .appendingPathComponent(UUID().uuidString, isDirectory: true)
+        #expect(CommandResolver.gatewayEntrypoint(in: tmp) == nil)
+    }
 }