Add xxhash-rust and bincode workspace dependencies for fast hashing and serialization. Implement cache_util for cache directory/path resolution with versioning, and IndexCache for saving/loading line indices to disk with file-hash validation.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Replace Vec<u8> with memmap2::Mmap for file content. Build line index via BufReader streaming (from_reader) instead of scanning mmap'd data, keeping RSS at ~3MB for 5GB files instead of ~5GB.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Rewrite LineIndex to use sparse sampling (every 256 lines) instead of per-line offsets. Add from_reader() for low-RSS streaming index construction via BufReader fill_buf()/consume(), reducing 5GB file RSS from 5122MB to 3.4MB.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Replace Line::styled with Span-based rendering: gutter (DarkGray fg) + content (level-based fg color). Add centered settings popup (S key) with j/k navigation, arrow key color cycling, number key shortcuts, Enter to save, Esc to cancel.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Add AppMode enum (Normal/Settings), level_cache field populated in recompute_wrap_cache via detect_level(), color_config loaded from TOML in main.rs. Refactor handle_key for mode dispatch with S key to enter settings.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Add level detection that tries JSON parsing first (trusts level field), then falls back to keyword scanning with word-boundary checks. Supports SEVERE, FATAL, ERROR, WARN, INFO, DEBUG, TRACE and their abbreviations.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Replace empty AppConfig stub with ColorConfig struct that stores level-to-color mappings as strings. Supports loading/saving from XDG config directory via TOML, with graceful degradation on missing/invalid files.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Press Tab to switch JSON log lines between raw single-line and indented
multi-line format (2-space indent, like jq output). Only JSON Object lines
are affected; plain text lines stay unchanged.
- Add json_format bool field to App, toggled by Tab
- Add format_json_line() standalone function with serde_json::to_string_pretty
- Integrate into recompute_wrap_cache with \n-split sub-line wrapping
- Center viewport on cursor after cache rebuild to prevent jump on toggle
- Add 12 unit tests covering format, toggle, and edge cases
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
