Status line inline format renders one character per line for ~10 seconds

Bug Description

When configuring the status line with an inline format (shell prompt integration rather than the default), two issues occur:

1. One character per line rendering: For approximately 10 seconds after launch, the status line text renders vertically (one character per line) instead of horizontally.

1. Missing git branch: The inline status line only shows the current directory — the git branch name is not displayed.

Expected Behavior

• Status line should render horizontally from the start
• Git branch name should be included alongside the current directory

Environment

• OS: macOS (Darwin 25.3.0)
• Shell: zsh
• Claude Code version: latest