Module inline_mode 

Inline Mode Spike: Validates correctness-first inline mode strategies.

This module implements the Phase -1 spike (bd-10i.1.1) to validate inline mode strategies for FrankenTUI. Inline mode preserves terminal scrollback while rendering a stable UI region + streaming logs.

Strategies Implemented

• Strategy A (Scroll-Region): Uses DECSTBM to constrain scrolling to a region.
• Strategy B (Overlay-Redraw): Save cursor, clear UI, write logs, redraw UI, restore.
• Strategy C (Hybrid): Overlay-redraw baseline with scroll-region optimization where safe.

Key Invariants

1. Cursor is restored after each frame present.
2. Terminal modes are restored on normal exit AND panic.
3. No full-screen clears in inline mode (preserves scrollback).
4. One writer owns terminal output (enforced by ownership).

Structs

InlineConfig

Configuration for inline mode rendering.

InlineRenderer

Inline mode renderer implementing the one-writer rule.

Enums

InlineStrategy

Inline mode rendering strategy.