Initial session suggestions lack tab-to-accept and send button

Description

When starting a new Claude Code session, the placeholder/suggestion text that appears in the input field behaves differently from mid-session suggestions:

Current behavior:

• Initial session suggestions don't respond to Tab key to accept
• No "send" button appears on the right side of the suggestion

Expected behavior:

• Tab should accept the suggestion (same as mid-session)
• "Send" button should appear on the right side (same as mid-session)

Steps to reproduce

1. Start a new Claude Code session
2. Observe the initial placeholder suggestion in the input field
3. Press Tab - nothing happens
4. Note the missing "send" button on the right

Comparison

| Feature | Mid-session suggestions | Initial session suggestions |
|---------|------------------------|----------------------------|
| Tab to accept | ✓ Works | ✗ Does not work |
| Send button | ✓ Visible | ✗ Missing |

Impact

Minor UX friction - users familiar with mid-session suggestion behavior expect the same interaction pattern at session start.