fix(web): gate boot() to native so the wasm build compiles

The clap CLI work made boot() read crate::cli, but cli is cfg'd out on
wasm (the web build takes no args), so the wasm target failed to compile.
boot() is only used by the native iced::daemon run(); the web build boots
via boot_web(). Gate boot() with cfg(not(wasm32)) to match.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

src/app/mod.rs

@@ -1811,7 +1811,9 @@ impl OpenCADStudio {
     }
 
     /// Boot function for `iced::daemon`: returns initial state plus a task that
-    /// opens the primary application window.
+    /// opens the primary application window. Native only — the web build uses
+    /// [`Self::boot_web`].
+    #[cfg(not(target_arch = "wasm32"))]
     fn boot() -> (Self, Task<Message>) {
         use helpers::build_window_icon;
         // Silently (re)register this binary as a .dwg/.dxf handler so it appears