Refactor to Cargo Workspace (#129)

* Refactor project into a Cargo workspace with distinct packages

- Created a root `Cargo.toml` defining a workspace.
- Moved `src/types` and `src/utils` into a new `pwsp-lib` crate for shared logic.
- Split binaries into their own crates: `pwsp-daemon`, `pwsp-cli`, and `pwsp-gui`.
- Shifted all dependencies into `[workspace.dependencies]` for centralized version management.
- Updated import paths across all crates (e.g. from `pwsp::` to `pwsp_lib::`).
- Updated build scripts, GitHub actions, Flatpak manifest, and AUR PKGBUILD to support the new workspace structure.
- Ensured no core application logic was altered.

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb build process in GitHub actions for workspace architecture

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* Fix cargo-deb asset discovery by using exact target/release paths

Co-authored-by: arabianq <55220741+arabianq@users.noreply.github.com>

* refactor deps in Cargo.toml files

* fix incorrect assets path

---------

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

pwsp-lib/src/utils/gui.rs

@@ -0,0 +1,141 @@
+use crate::{
+    types::{
+        audio_player::FullState,
+        config::{GuiConfig, HotkeyConfig},
+        gui::AudioPlayerState,
+        socket::{Request, Response},
+    },
+    utils::daemon::{is_daemon_running, make_request},
+};
+use anyhow::{Result, anyhow};
+use std::{
+    path::PathBuf,
+    sync::{Arc, Mutex},
+    time::Instant,
+};
+use tokio::time::{Duration, sleep};
+
+pub fn get_gui_config() -> GuiConfig {
+    GuiConfig::load_from_file().unwrap_or_else(|_| {
+        let mut config = GuiConfig::default();
+        config.save_to_file().ok();
+        config
+    })
+}
+
+pub fn make_request_sync(request: Request) -> Result<Response> {
+    tokio::task::block_in_place(|| {
+        tokio::runtime::Handle::current()
+            .block_on(make_request(request))
+            .map_err(|e| anyhow!(e))
+    })
+}
+
+pub fn make_request_async(request: Request) {
+    tokio::spawn(async move {
+        make_request(request).await.ok();
+    });
+}
+
+pub fn ensure_pwsp_audio_dir() -> PathBuf {
+    let audio_dir = dirs::audio_dir().unwrap_or("~/Music".into());
+    let pwsp_audio_dir = audio_dir.join("PWSP");
+
+    if !pwsp_audio_dir.exists() {
+        std::fs::create_dir_all(&pwsp_audio_dir).ok();
+    }
+
+    pwsp_audio_dir
+}
+
+pub fn format_time_pair(position: f32, duration: f32) -> String {
+    fn format_time(seconds: f32) -> String {
+        let total_seconds = seconds.round() as u32;
+        let minutes = total_seconds / 60;
+        let secs = total_seconds % 60;
+        format!("{:02}:{:02}", minutes, secs)
+    }
+
+    format!("{}/{}", format_time(position), format_time(duration))
+}
+
+pub fn start_app_state_thread(audio_player_state_shared: Arc<Mutex<AudioPlayerState>>) {
+    tokio::spawn(async move {
+        let sleep_duration = Duration::from_secs_f32(1.0 / 60.0);
+        let mut last_hotkey_poll = Instant::now();
+
+        loop {
+            let is_running = is_daemon_running().unwrap_or(false);
+
+            if !is_running {
+                {
+                    let mut guard = audio_player_state_shared
+                        .lock()
+                        .unwrap_or_else(|e| e.into_inner());
+                    guard.is_daemon_running = false;
+                }
+                sleep(Duration::from_millis(500)).await;
+                continue;
+            }
+
+            let full_state_req = Request::get_full_state();
+            let full_state_res = make_request(full_state_req).await.unwrap_or_default();
+
+            if full_state_res.status {
+                let full_state: FullState =
+                    serde_json::from_str(&full_state_res.message).unwrap_or_default();
+
+                let mut guard = audio_player_state_shared
+                    .lock()
+                    .unwrap_or_else(|e| e.into_inner());
+
+                guard.state = match guard.new_state.clone() {
+                    Some(new_state) => {
+                        guard.new_state = None;
+                        new_state
+                    }
+                    None => full_state.state,
+                };
+                guard.tracks = full_state.tracks;
+                guard.volume = full_state.volume;
+                guard.current_input = full_state
+                    .current_input
+                    .split(" - ")
+                    .next()
+                    .unwrap_or_default()
+                    .to_string();
+
+                if guard.all_inputs != full_state.all_inputs {
+                    guard.all_inputs = full_state.all_inputs;
+                    let mut sorted: Vec<(String, String)> = guard
+                        .all_inputs
+                        .iter()
+                        .map(|(k, v)| (k.clone(), v.clone()))
+                        .collect();
+                    sorted.sort_by(|a, b| a.0.cmp(&b.0));
+                    guard.all_inputs_sorted = sorted;
+                }
+
+                guard.is_daemon_running = true;
+            }
+
+            // Poll hotkey config at a lower frequency (~every 2 seconds)
+            if last_hotkey_poll.elapsed() >= Duration::from_secs(2) {
+                let hotkey_res = make_request(Request::get_hotkeys())
+                    .await
+                    .unwrap_or_default();
+                if hotkey_res.status
+                    && let Ok(config) = serde_json::from_str::<HotkeyConfig>(&hotkey_res.message)
+                {
+                    let mut guard = audio_player_state_shared
+                        .lock()
+                        .unwrap_or_else(|e| e.into_inner());
+                    guard.hotkey_config = Some(config);
+                }
+                last_hotkey_poll = Instant::now();
+            }
+
+            sleep(sleep_duration).await;
+        }
+    });
+}