feat(workspace): add is_workspace_mode() to PackageQueryArgs

Single semantic method replacing individual accessor methods, returns
true when any workspace-level selection flag is active.

Author: fengmk2

crates/vite_workspace/src/package_filter.rs

@@ -245,6 +245,12 @@ Match packages by name, directory, or glob pattern.
 }
 
 impl PackageQueryArgs {
+    /// Whether any workspace-level selection flag is active
+    /// (`--recursive`, `--workspace-root`, or `--filter`).
+    pub fn is_workspace_mode(&self) -> bool {
+        self.recursive || self.workspace_root || !self.filter.is_empty()
+    }
+
     /// Convert CLI arguments into an opaque [`PackageQuery`].
     ///
     /// `package_name` is the optional package name from a `package#task` specifier.