fix(launcher): apply cache settings to all uv invocations (ankitects#4404)

Author: iamllama

qt/launcher/src/main.rs

@@ -327,7 +327,6 @@ fn handle_version_install_or_update(state: &State, choice: MainMenuChoice) -> Re
     }
 
     command
-        .env("UV_CACHE_DIR", &state.uv_cache_dir)
         .env("UV_PYTHON_INSTALL_DIR", &state.uv_python_install_dir)
         .env(
             "UV_HTTP_TIMEOUT",
@@ -346,10 +345,6 @@ fn handle_version_install_or_update(state: &State, choice: MainMenuChoice) -> Re
         }
     }
 
-    if state.no_cache_marker.exists() {
-        command.env("UV_NO_CACHE", "1");
-    }
-
     match command.ensure_success() {
         Ok(_) => {
             // Sync succeeded
@@ -1024,6 +1019,12 @@ fn uv_command(state: &State) -> Result<Command> {
             .env("UV_DEFAULT_INDEX", &pypi_mirror);
     }
 
+    if state.no_cache_marker.exists() {
+        command.env("UV_NO_CACHE", "1");
+    } else {
+        command.env("UV_CACHE_DIR", &state.uv_cache_dir);
+    }
+
     // have uv use the system certstore instead of webpki-roots'
     command.env("UV_NATIVE_TLS", "1");