style: cargo fmt on today's new code (883/884/886/opus-pin)

The mergemaster gates run rustfmt and rejected 864's merge because
several files I added/touched in master today had not been fmt'd.
Six files affected, mostly trivial line-wrapping nits. Fixes the
formatting gate for the next 864 merge attempt.

server/src/service/shell/mod.rs

@@ -8,12 +8,12 @@
 
 /// Side-effectful shell I/O — filesystem permission checks.
 pub mod io;
-/// Pure command-safety checks, blocked-binary lists, and output truncation.
-pub mod path_guard;
 /// Cargo / rustc diagnostic parser — extracts structured errors and warnings
 /// from raw cargo output. Used by run_check / run_build / run_lint MCP tools
 /// (bug 886).
 pub mod parse_diagnostics;
+/// Pure command-safety checks, blocked-binary lists, and output truncation.
+pub mod path_guard;
 
 #[allow(unused_imports)]
 pub use path_guard::{

server/src/service/shell/parse_diagnostics.rs

@@ -59,8 +59,8 @@ pub fn parse_diagnostics(output: &str) -> Vec<Diagnostic> {
         // Anchored to start-of-line: "error" or "warning", optional [CODE], colon, message.
         Regex::new(r"^(error|warning)(?:\[([A-Za-z0-9]+)\])?: (.+)$").unwrap()
     });
-    let loc_re = LOC_RE
-        .get_or_init(|| Regex::new(r"^\s*-->\s+([^:\s][^:]*):(\d+)(?::\d+)?\s*$").unwrap());
+    let loc_re =
+        LOC_RE.get_or_init(|| Regex::new(r"^\s*-->\s+([^:\s][^:]*):(\d+)(?::\d+)?\s*$").unwrap());
 
     let lines: Vec<&str> = output.lines().collect();
     let mut diagnostics = Vec::new();
@@ -155,7 +155,8 @@ mod tests {
 
     #[test]
     fn ignores_non_diagnostic_lines() {
-        let input = "    Checking huskies v0.10.4\n   Compiling foo v0.1.0\n    Finished dev profile\n";
+        let input =
+            "    Checking huskies v0.10.4\n   Compiling foo v0.1.0\n    Finished dev profile\n";
         assert!(parse_diagnostics(input).is_empty());
     }
 
@@ -192,8 +193,10 @@ error: could not compile `huskies` (bin \"huskies\") due to 3 previous errors; 1
         assert_eq!(summary.warning_count, 2);
 
         // The 3 main compile errors must be present with file + line.
-        let e0061: Vec<&Diagnostic> =
-            diags.iter().filter(|d| d.code.as_deref() == Some("E0061")).collect();
+        let e0061: Vec<&Diagnostic> = diags
+            .iter()
+            .filter(|d| d.code.as_deref() == Some("E0061"))
+            .collect();
         assert_eq!(e0061.len(), 3);
         let files: Vec<Option<&str>> = e0061.iter().map(|d| d.file.as_deref()).collect();
         assert!(files.contains(&Some("server/src/agents/pool/auto_assign/merge.rs")));