chore(fmt): reflow three link constants rustfmt rejects

f7a4cb6 repointed the GitHub links without running cargo fmt; the
fmt gate has been red since.

Claude-Session: https://claude.ai/code/session_01RUqV8HVGXcAETyYbZ2tPQ4

crates/codegen/kigi-shell/src/agent/feedback_client.rs

@@ -12,8 +12,7 @@ use std::sync::Arc;
 use serde::Serialize;
 
 /// Where non-subscription users (no OAuth session) submit feedback instead.
-pub const FEEDBACK_ISSUES_URL: &str =
-    "https://github.com/ZacharyZhang-NY/Kigi-CLI/issues";
+pub const FEEDBACK_ISSUES_URL: &str = "https://github.com/ZacharyZhang-NY/Kigi-CLI/issues";
 
 /// HTTP error from the feedback endpoint with a preserved status code, so
 /// callers can distinguish auth failures (401) without string matching.