[dmoliveira]

Summary

• move the primary run loop and its runtime helpers from src/main.rs into src/run_loop.rs
• keep related consumers compiling by importing the extracted history, raw-mode, heartbeat, and clipboard helpers from the new module
• preserve the current behavior and test contracts while shrinking the biggest remaining concentration point in src/main.rs

Validation

• cargo test
• cargo clippy --all-targets --all-features -- -D warnings