fix: address clippy lint warnings

src/tui/command_palette.rs

@@ -151,9 +151,7 @@ fn modal_block() -> Block<'static> {
 }
 
 fn parse_section_term(term: &str) -> Option<(PaletteSection, String)> {
-    let mut parts = term.splitn(2, ':');
-    let section = parts.next()?;
-    let query = parts.next()?;
+    let (section, query) = term.split_once(':')?;
 
     if section.is_empty() || query.is_empty() {
         return None;

src/tui/ui.rs

@@ -2851,10 +2851,7 @@ fn run_git_query(workspace: &Path, args: &[&str]) -> std::io::Result<String> {
         .current_dir(workspace)
         .output()?;
     if !output.status.success() {
-        return Err(std::io::Error::new(
-            std::io::ErrorKind::Other,
-            "git command failed",
-        ));
+        return Err(std::io::Error::other("git command failed"));
     }
     Ok(String::from_utf8_lossy(&output.stdout).to_string())
 }