fix(dependencies): read the tool name only where a replay can pin it

host_tool_available's name is consulted only under a conformance replay
(test builds, unix), so the release build failed workspace Clippy with
unused_variables (batch 8 clippy log). Bind it explicitly outside that cfg.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Signed-off-by: CodeWhale Bot <[email protected]>

crates/tui/src/dependencies.rs

@@ -282,6 +282,9 @@ pub(crate) fn host_tool_available(tool: &str, probe: impl FnOnce() -> bool) -> b
     }) {
         return available;
     }
+    // Only a conformance replay reads the name.
+    #[cfg(not(all(test, unix)))]
+    let _ = tool;
     probe()
 }