rip out tauri bundle (v2), swc -> esbuild, blacksmith -> warpbuild, FAST CI 🚀 (#5328)

- inline mac, windows, linux bundling in the cli
- remove tauri bundle from our dep tree
- trim down the rpm crate for fewer dependencies in tree
- migrate from blacksmith to warpbuild
- move off swc and instead use esbuild via tool
- use dev drives in windows CI
- use fork of nix action for faster caching
- test bundling in CI
- fix asset handling in linux 
- add default APPDATA location for webview2 installs for dioxus apps on windows

packages/desktop/src/config.rs

@@ -131,9 +131,16 @@ impl Config {
         self
     }
 
-    /// set the directory where data will be stored in release mode.
+    /// Set the directory where WebView2 stores its user data (cookies, cache, IndexedDB, etc.).
     ///
-    /// > Note: This **must** be set when bundling on Windows.
+    /// If not set, Dioxus automatically chooses a sensible default:
+    /// - **Windows:** `%LOCALAPPDATA%/<exe_name>` — this avoids the WebView2 default of
+    ///   placing data next to the executable, which fails in read-only locations like
+    ///   `Program Files` or on certain drive types (e.g. ReFS dev drives).
+    /// - **macOS/Linux:** managed by WebKit automatically.
+    ///
+    /// You typically only need this if you want multiple apps to share a WebView2 profile
+    /// or need the data in a specific location for compliance/IT policy reasons.
     pub fn with_data_directory(mut self, path: impl Into<PathBuf>) -> Self {
         self.data_dir = Some(path.into());
         self

packages/desktop/src/edits.rs

@@ -231,6 +231,7 @@ impl EditWebsocket {
         let hex_encoded_server_key = encode_key_string(&current_server_location.server_key);
         let mut location = None;
 
+        #[allow(clippy::result_large_err)]
         let on_request = |req: &Request, res| {
             // Try to parse the webview id and key from the path
             let path = req.uri().path();

packages/desktop/src/lib.rs

@@ -3,6 +3,7 @@
 #![doc(html_favicon_url = "https://avatars.githubusercontent.com/u/79236386")]
 #![deny(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_cfg))]
+#![allow(unexpected_cfgs)]
 
 mod android_sync_lock;
 mod app;

packages/desktop/src/webview.rs

@@ -260,12 +260,23 @@ impl WebviewInstance {
 
             unsafe {
                 let window: id = window.ns_window() as id;
-                #[allow(unexpected_cfgs)]
                 let _: () = msg_send![window, setCollectionBehavior: NSWindowCollectionBehavior::NSWindowCollectionBehaviorManaged];
             }
         }
 
-        let mut web_context = WebContext::new(cfg.data_dir.clone());
+        let mut web_context = WebContext::new(cfg.data_dir.clone().or_else(|| {
+            // On Windows, WebView2 defaults to storing its data next to the executable.
+            // This fails on certain drives (e.g. ReFS dev drives, Program Files) where the
+            // directory may not be writable. Fall back to %LOCALAPPDATA%/<exe_name> automatically.
+            if cfg!(windows) {
+                let exe = std::env::current_exe().ok()?;
+                let name = exe.file_stem()?.to_str()?;
+                let local_app_data = std::env::var("LOCALAPPDATA").ok()?;
+                Some(std::path::PathBuf::from(local_app_data).join(name))
+            } else {
+                None
+            }
+        }));
         let edit_queue = shared.websocket.create_queue();
         let asset_handlers = AssetHandlerRegistry::new();
         let edits = WebviewEdits::new(dom.runtime(), edit_queue.clone());