style: format seluruh workspace dengan cargo fmt

Menyeragamkan format kode sesuai rustfmt (126 file). Sebelumnya
lefthook pre-commit 'cargo fmt --check' akan gagal pada commit apa pun.

apps/domain/src/core/store.rs

@@ -40,9 +40,11 @@ impl Store {
     ///
     /// Why: paths are computed, not created — call `ensure_dirs` before use.
     pub fn new() -> Self {
-        let base = if let Some(data_dir) = std::env::var("XDG_DATA_HOME").ok()
-            .or_else(|| std::env::var("HOME").ok().map(|h| format!("{h}/.local/share")))
-        {
+        let base = if let Some(data_dir) = std::env::var("XDG_DATA_HOME").ok().or_else(|| {
+            std::env::var("HOME")
+                .ok()
+                .map(|h| format!("{h}/.local/share"))
+        }) {
             PathBuf::from(data_dir).join("zesdex")
         } else {
             PathBuf::from(".local/share/zesdex")