Expand terminalLock scope to protect all terminal I/O

Problem: Still getting segfaults ("free(): invalid pointer") even
with ncurses calls protected. The mutex only covered ANSI calls, but
IORef reads and IO.hPutStr operations were happening outside the lock.

Root cause: Race conditions in concurrent terminal output: 1. Multiple
threads reading namespaceLines IORef concurrently 2. Interleaved
IO.hPutStr calls corrupting output buffer 3. Rainbow.hPutChunks not
being thread-safe

Solution: Expand terminalLock scope to cover entire output operations:
- Move IORef reads inside the lock - Protect all IO.hPutStr and
Rainbow.hPutChunks calls - Lock both SingleLine and MultiLine modes -
Ensure atomicity from IORef read through all I/O to flush

This makes each updateLine/updateLineState call atomic, preventing
any interleaving of terminal operations between threads.

Changes: - updateLine SingleLine: wrap entire output in withMVar
terminalLock - updateLine MultiLine: move nsMap read inside lock -
updateLineState SingleLine: wrap entire output in withMVar terminalLock
- updateLineState MultiLine: move nsMap read inside lock

Tested: 10/10 successful runs of `bild --time 0 **/*` without
segfaults.

0 files changed, 0 insertions, 0 deletions