fix(test): keep tests out of the user's config folder

Tests resolved the real per-user config dir. When the alias table
version moved, parallel tests migrated and rewrote the user's alias
file concurrently and one left it holding a single alias. Under test,
config_dir() is a per-process temp folder and the alias table comes
from the shipped defaults with no file I/O.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/alias.rs

@@ -35,6 +35,11 @@ const DEFAULT_ALIASES_PGP: &str = include_str!("../../assets/ocad.pgp");
 /// config base can't be resolved (headless, no `HOME`).
 #[cfg(not(target_arch = "wasm32"))]
 fn alias_file_path() -> Option<PathBuf> {
+    // Tests read the shipped defaults: parallel tests seeding and migrating one
+    // shared file race, and a half-written table fails unrelated alias tests.
+    if cfg!(test) {
+        return None;
+    }
     Some(crate::config::config_dir()?.join("ocad.pgp"))
 }