fix(tmux): wrap opencode attach commands in zsh -c shell

🤖 Generated with assistance of OhMyOpenCode

src/shared/tmux/tmux-utils/pane-replace.ts

@@ -34,7 +34,7 @@ export async function replaceTmuxPane(
 	})
 	await ctrlCProc.exited
 
-	const opencodeCmd = `opencode attach ${serverUrl} --session ${sessionId}`
+	const opencodeCmd = `zsh -c 'opencode attach ${serverUrl} --session ${sessionId}'`
 
 	const proc = spawn([tmux, "respawn-pane", "-k", "-t", paneId, opencodeCmd], {
 		stdout: "pipe",

src/shared/tmux/tmux-utils/pane-spawn.ts

@@ -48,7 +48,7 @@ export async function spawnTmuxPane(
 
 	log("[spawnTmuxPane] all checks passed, spawning...")
 
-	const opencodeCmd = `opencode attach ${serverUrl} --session ${sessionId}`
+	const opencodeCmd = `zsh -c 'opencode attach ${serverUrl} --session ${sessionId}'`
 
 	const args = [
 		"split-window",