fix(mcp): kept macos stdio servers attached

Left Darwin stdio MCP server launches in the inherited session so macOS TCC can prompt for Apple Events permissions used by xcrun mcpbridge.

Added resolver coverage for Darwin while preserving Linux detach and Windows console behavior.

Fixes #4987

packages/coding-agent/src/modes/controllers/input-controller.ts

@@ -1024,10 +1024,10 @@ export class InputController {
 			// leaves wrappers and pipeline peers running and the terminal
 			// hung — exactly the failure shape we're fixing. Stopping the whole
 			// group keeps the shell's job-control view consistent. Long-lived
-			// children that must survive the suspend (MCP stdio servers via
-			// the `detached: true` spawn in `mcp/transports/stdio.ts`, every
-			// brush external command via brush's per-child `setsid` in
-			// `crates/vendor/brush-core/src/commands.rs`) are already in
+			// children that must survive the suspend (Linux/other POSIX MCP stdio
+			// servers via the platform-specific `detached: true` spawn in
+			// `mcp/transports/stdio.ts`, every brush external command via brush's
+			// per-child `setsid` in `crates/vendor/brush-core/src/commands.rs`) are
 			// their own sessions, so pgid=0 does not reach them.
 			process.kill(0, "SIGSTOP");
 		} catch (err) {