chore: drop runner shim and add committer helper

apps/macos/Sources/Clawdis/GeneralSettings.swift

@@ -466,7 +466,7 @@ extension GeneralSettings {
         }
 
         // Step 1: basic SSH reachability check
-        let sshResult = await ShellRunner.run(
+        let sshResult = await ShellExecutor.run(
             command: Self.sshCheckCommand(target: settings.target, identity: settings.identity),
             cwd: nil,
             env: nil,

apps/macos/Sources/Clawdis/RelayEnvironment.swift

@@ -129,7 +129,7 @@ enum RelayEnvironment {
         let cmd = [pnpm, "add", "-g", "clawdis@\(target)"]
 
         statusHandler("Installing clawdis@\(target) via pnpm…")
-        let response = await ShellRunner.run(command: cmd, cwd: nil, env: ["PATH": preferred], timeout: 300)
+        let response = await ShellExecutor.run(command: cmd, cwd: nil, env: ["PATH": preferred], timeout: 300)
         if response.ok {
             statusHandler("Installed clawdis@\(target)")
         } else {

apps/macos/Sources/Clawdis/ShellExecutor.swift

@@ -1,7 +1,7 @@
 import ClawdisIPC
 import Foundation
 
-enum ShellRunner {
+enum ShellExecutor {
     static func run(command: [String], cwd: String?, env: [String: String]?, timeout: Double?) async -> Response {
         guard !command.isEmpty else { return Response(ok: false, message: "empty command") }
 

apps/macos/Sources/Clawdis/XPCService.swift

@@ -70,7 +70,7 @@ final class ClawdisXPCService: NSObject, ClawdisXPCProtocol {
                     .ensure([.screenRecording], interactive: false)[.screenRecording] ?? false
                 guard authorized else { return Response(ok: false, message: "screen recording permission missing") }
             }
-            return await ShellRunner.run(command: command, cwd: cwd, env: env, timeout: timeoutSec)
+            return await ShellExecutor.run(command: command, cwd: cwd, env: env, timeout: timeoutSec)
 
         case let .agent(message, thinking, session, deliver, to):
             let trimmed = message.trimmingCharacters(in: .whitespacesAndNewlines)