fix(config): use XDG picture directory as default

Replace hardcoded \"~/Pictures\" with dirs::picture_dir() which resolves
to the actual absolute path (e.g. /home/user/Pictures).

The tilde (~) in paths is not automatically expanded by Rust's PathBuf,
causing path.exists() to return false for \"~/Pictures\".

Using dirs::picture_dir() provides:
- Proper absolute path resolution
- XDG Base Directory compliance
- Fallback to home directory if Pictures doesn't exist

Note: Users with existing config files need to delete
~/.config/cosmic/org.codeberg.wfx.Noctua/v1/default_image_dir
to apply the new default."

Cargo.lock

@@ -1229,7 +1229,7 @@ dependencies = [
  "atomicwrites",
  "cosmic-config-derive",
  "cosmic-settings-daemon",
- "dirs",
+ "dirs 6.0.0",
  "futures-util",
  "iced_futures",
  "known-folders",
@@ -1318,7 +1318,7 @@ dependencies = [
  "almost",
  "cosmic-config",
  "csscolorparser",
- "dirs",
+ "dirs 6.0.0",
  "palette",
  "ron",
  "serde",
@@ -1518,13 +1518,34 @@ dependencies = [
  "crypto-common",
 ]
 
+[[package]]
+name = "dirs"
+version = "5.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "44c45a9d03d6676652bcb5e724c7e988de1acad23a711b5217ab9cbecbec2225"
+dependencies = [
+ "dirs-sys 0.4.1",
+]
+
 [[package]]
 name = "dirs"
 version = "6.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
 dependencies = [
- "dirs-sys",
+ "dirs-sys 0.5.0",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "520f05a5cbd335fae5a99ff7a6ab8627577660ee5cfd6a94a6a929b52ff0321c"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users 0.4.6",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1535,7 +1556,7 @@ checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
 dependencies = [
  "libc",
  "option-ext",
- "redox_users",
+ "redox_users 0.5.2",
  "windows-sys 0.61.2",
 ]
 
@@ -3610,6 +3631,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "dirs 5.0.1",
  "env_logger",
  "futures-util",
  "i18n-embed",
@@ -4793,6 +4815,17 @@ dependencies = [
  "bitflags 2.10.0",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ba009ff324d1fc1b900bd1fdb31564febe58a8ccc8a6fdbb93b543d33b13ca43"
+dependencies = [
+ "getrandom 0.2.16",
+ "libredox",
+ "thiserror 1.0.69",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.5.2"

Cargo.toml

@@ -38,6 +38,7 @@ i18n-embed-fl = "0.10"
 # Misc utilities
 open = "5.3.2"
 rust-embed = "8.8.0"
+dirs = "5.0"
 image = "0.25.9"
 clap = { version = "4.5.54", features = ["derive"] }
 env_logger = "0.11.8"

src/app/mod.rs

@@ -75,9 +75,19 @@ impl cosmic::Application for Noctua {
 
         let mut model = AppModel::new(config.clone());
 
-        // Use CLI arguments from `flags` to open initial file or folder.
         let Flags::Args(args) = flags;
-        if let Some(path) = args.file {
+
+        // Determine initial path: CLI argument takes priority.
+        // Fall back to configured default directory only if it exists.
+        let initial_path = args.file.or_else(|| {
+            config
+                .default_image_dir
+                .as_ref()
+                .filter(|p| p.exists())
+                .cloned()
+        });
+
+        if let Some(path) = initial_path {
             document::file::open_initial_path(&mut model, path);
         }
 
@@ -107,7 +117,7 @@ impl cosmic::Application for Noctua {
 
     fn update(&mut self, message: Self::Message) -> Task<Action<Self::Message>> {
         match &message {
-            // Handle nav bar toggle.
+            // Handle nav bar toggle. I think this is ugly but it works.
             AppMessage::ToggleNavBar => {
                 self.config.nav_bar_visible = !self.config.nav_bar_visible;
                 self.core.nav_bar_set_toggled(self.config.nav_bar_visible);
@@ -216,7 +226,7 @@ fn handle_key_press(key: Key, modifiers: Modifiers) -> Option<AppMessage> {
         }
 
         // Zoom.
-        Key::Character("+") | Key::Character("=") => Some(ZoomIn),
+        Key::Character("+" |"=") => Some(ZoomIn),
         Key::Character("-") => Some(ZoomOut),
         Key::Character("1") => Some(ZoomReset),
         Key::Character(ch) if ch.eq_ignore_ascii_case("f") => Some(ZoomFit),

src/config.rs

@@ -21,8 +21,7 @@ pub struct AppConfig {
 impl Default for AppConfig {
     fn default() -> Self {
         Self {
-            // TODO: Use xdg dir for picture
-            default_image_dir: Some(PathBuf::from("~/Pictures")),
+            default_image_dir: dirs::picture_dir().or_else(dirs::home_dir),
             nav_bar_visible: false,
             context_drawer_visible: false,
         }