v0.2.0

clean architecture refactor, performance, resilience, DX/UX

architecture:
- 13 crates with proper domain/application/infrastructure layers
- domain crate: newtypes, ports (Plugin, AppLauncher), constants
- kernel: pure orchestrator
- shared UI state machine (k-launcher-ui-core)
- merged plugin-api into domain as ports module
- granular file structure (no monolithic lib.rs)
- all tests extracted to tests/ directories

features:
- frecency boost in search results
- empty query shows top frecent apps
- append-only frecency log with configurable compaction
- config-driven styling (all colors, sizes, debounce)
- configurable terminal emulator, external plugin timeout
- log rotation with max_log_files
- loading indicator, descriptive placeholder text
- graceful shutdown via iced::exit() + Plugin::shutdown()
- --version flag, panic hook, signal handling (SIGINT/SIGTERM)
- SpawnInTerminal in external plugin protocol

performance:
- ~1500 -> ~50 heap allocs per keystroke
- reused Matcher, Pattern, char buffer across entries
- Arc<str> for shared result fields
- pre-filter before fuzzy matching
- partial sort for top frecent IDs
- cached lowercase names in entries

resilience:
- parking_lot (no mutex poisoning)
- thiserror hierarchy (PluginError, ConfigError, AppError)
- all silent error swallowing replaced with tracing::warn
- config parse errors logged

quality:
- named constants (no magic strings/numbers)
- named types (no anonymous tuples)
- Rgba newtype with validation
- domain newtype validation (debug_assert non-empty)
- man page, LICENSE (MIT), PKGBUILD, example config
- plugin development guide updated
- make check (fmt + clippy + test), make dev (RUST_LOG=debug)

style: format code for better readability in tests and function signatures

fix: update build_entries function signature to ignore frecency parameter

fix(review): bugs, arch violations, design smells

P1 bugs:
- unix_launcher: shell_split respects quoted args (was split_whitespace)
- plugin-host: 5s timeout on external plugin search
- ui: handle engine init panic, wire error state
- ui-egui: read window config instead of always using defaults
- plugin-url: use OpenPath action instead of SpawnProcess+xdg-open

Architecture:
- remove WindowConfig (mirror of WindowCfg); use WindowCfg directly
- remove on_select closure from SearchResult (domain leakage)
- remove LaunchAction::Custom; add Plugin::on_selected + SearchEngine::on_selected
- apps: record frecency via on_selected instead of embedded closure

Design smells:
- frecency: extract decay_factor helper, write outside mutex
- apps: remove cfg(test) cache_path hack; add new_for_test ctor
- apps: stable ResultId using name+exec to prevent collision
- files: stable ResultId using full path instead of index
- plugin-host: remove k-launcher-os-bridge dep (WindowConfig gone)

Update iced dependency in Cargo.toml to disable default features and add additional ones

feat(app): enhance engine initialization with EngineHandle and update run function signature

feat: production hardening (panic isolation, file logging, apps cache)

- Kernel::search wraps each plugin in catch_unwind; panics are logged and return []
- init_logging() adds daily rolling file at ~/.local/share/k-launcher/logs/
- AppsPlugin caches entries to ~/.cache/k-launcher/apps.bin via bincode; stale-while-revalidate on subsequent launches
- 57 tests pass

refactor: remove client module and associated show command logic

fix(app): format code for clarity in update function

chore: update .gitignore and enhance README with compositor setup instructions

chore(docs): remove unused screenshot file

feature/prod-ready (#1)

Reviewed-on: #1

fix(calc): remove ambiguous log alias, use ln/log2/log10 explicitly

fix(calc): fix log/ln naming, cache math context, strengthen sin(pi) test

feat(calc): add math functions (sqrt, sin, cos, etc.) and pi/e constants

refactor(calc): rename preprocess, extend underscore test assertions

feat(calc): strip underscore digit separators

feat: update dependencies for improved compatibility and performance

feat: add plugin-url for URL handling and open in browser functionality

feat: add support for external plugins and enhance plugin management

feat: add Makefile for build, run, and installation commands

feat: add required features for k-launcher-egui and update dependencies

feat: update README and add documentation for installation, configuration, usage, and plugin development

feat: enhance configuration management and UI styling, remove unused theme module

feat: add k-launcher-config crate for configuration management and integrate with existing components

feat: add k-launcher-ui-egui crate for enhanced UI

- Introduced a new crate `k-launcher-ui-egui` to provide a graphical user interface using eframe and egui.
- Updated the workspace configuration in `Cargo.toml` to include the new crate.
- Implemented the main application logic in `src/app.rs`, handling search functionality and user interactions.
- Created a library entry point in `src/lib.rs` to expose the `run` function for launching the UI.
- Modified the `k-launcher` crate to include a new binary target for the egui-based launcher.
- Added a new main file `src/main_egui.rs` to initialize and run the egui UI with the existing kernel and launcher components.

feat: implement OS bridge and enhance app launcher functionality

feat: add FilesPlugin for file searching and integrate into KLauncher

feat: implement frecency tracking for app usage and enhance search functionality

feat: add CmdPlugin for executing terminal commands and update workspace configuration

refactor: update dependencies and improve keyboard event handling in KLauncherApp

refactor: simplify theme usage and enhance AppsPlugin structure

feat: restructure k-launcher workspace and add core functionality

- Updated Cargo.toml to include a new k-launcher crate and reorganized workspace members.
- Introduced a README.md file detailing the project philosophy, architecture, and technical specifications.
- Implemented a new Kernel struct in k-launcher-kernel for managing plugins and search functionality.
- Created a Plugin trait for plugins to implement, allowing for asynchronous search operations.
- Developed k-launcher-ui with an Iced-based UI for user interaction, including search input and result display.
- Added AppsPlugin and CalcPlugin to handle application launching and basic calculations, respectively.
- Established a theme module for UI styling, focusing on an Aero aesthetic.
- Removed unnecessary main.rs files from plugin crates, streamlining the project structure.

Initialize k-launcher project structure with multiple crates and basic configurations

crates/k-launcher-config/tests/config.rs

@@ -0,0 +1,75 @@
+use k_launcher_config::Config;
+
+#[test]
+fn default_config_has_sane_values() {
+    let cfg = Config::default();
+    assert_eq!(cfg.search.max_results, 8);
+    assert_eq!(cfg.window.width, 600.0);
+    assert_eq!(cfg.window.height, 400.0);
+    assert!(!cfg.window.decorations);
+    assert!(cfg.window.transparent);
+    assert!(!cfg.window.resizable);
+    assert!(cfg.plugins.calc);
+    assert!(cfg.plugins.apps);
+    assert_eq!(cfg.appearance.search_font_size, 18.0);
+    assert_eq!(
+        cfg.appearance.placeholder,
+        "Search apps, type > for commands, = for math"
+    );
+}
+
+#[test]
+fn parse_partial_toml_uses_defaults() {
+    let toml_str = "[search]\nmax_results = 5\n";
+    let cfg: Config = toml::from_str(toml_str).unwrap();
+    assert_eq!(cfg.search.max_results, 5);
+    assert_eq!(cfg.window.width, 600.0);
+    assert_eq!(cfg.appearance.search_font_size, 18.0);
+    assert!(cfg.plugins.apps);
+}
+
+#[test]
+fn parse_full_toml_roundtrip() {
+    let toml_str = r#"
+[window]
+width = 800.0
+height = 500.0
+decorations = true
+transparent = false
+resizable = true
+
+[appearance]
+background_rgba = [10.0, 10.0, 20.0, 0.8]
+border_rgba = [100.0, 200.0, 255.0, 1.0]
+border_width = 2.0
+border_radius = 12.0
+search_font_size = 20.0
+title_size = 16.0
+desc_size = 13.0
+row_radius = 6.0
+placeholder = "Type here..."
+
+[search]
+max_results = 12
+
+[plugins]
+calc = false
+cmd = true
+files = false
+apps = true
+"#;
+    let cfg: Config = toml::from_str(toml_str).unwrap();
+    assert_eq!(cfg.window.width, 800.0);
+    assert_eq!(cfg.window.height, 500.0);
+    assert!(cfg.window.decorations);
+    assert!(!cfg.window.transparent);
+    assert_eq!(
+        cfg.appearance.background_rgba,
+        k_launcher_config::Rgba::new(10.0, 10.0, 20.0, 0.8)
+    );
+    assert_eq!(cfg.appearance.search_font_size, 20.0);
+    assert_eq!(cfg.appearance.placeholder, "Type here...");
+    assert_eq!(cfg.search.max_results, 12);
+    assert!(!cfg.plugins.calc);
+    assert!(!cfg.plugins.files);
+}