Apply rustfmt pass across all modules

Pure whitespace normalization — no logic changes. Mostly:
- collapsing multi-line match/if arms rustfmt prefers inline
- inlining short `with_context`/`ok_or_else` closures
- reformatting nested method chains for consistency

Build and clippy stay clean.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/service.rs

@@ -43,13 +43,11 @@ fn systemctl(args: &[&str]) -> Result<()> {
 
 /// Write the unit, reload systemd, and enable+start the service.
 pub fn install() -> Result<()> {
-    let exe = std::env::current_exe()
-        .context("Cannot determine path to own executable")?;
+    let exe = std::env::current_exe().context("Cannot determine path to own executable")?;
     let path = unit_path()?;
 
     if let Some(parent) = path.parent() {
-        std::fs::create_dir_all(parent)
-            .with_context(|| format!("Failed to create {parent:?}"))?;
+        std::fs::create_dir_all(parent).with_context(|| format!("Failed to create {parent:?}"))?;
     }
 
     let contents = render_unit(&exe);
@@ -77,8 +75,7 @@ pub fn uninstall() -> Result<()> {
     let _ = systemctl(&["disable", "--now", UNIT_NAME]);
 
     if path.exists() {
-        std::fs::remove_file(&path)
-            .with_context(|| format!("Failed to remove {path:?}"))?;
+        std::fs::remove_file(&path).with_context(|| format!("Failed to remove {path:?}"))?;
         println!("Removed {}", path.display());
     } else {
         println!("No unit file at {}", path.display());