fix: upgrade to leptos 0.8 with compatible deps

- Update leptos-use from 0.15 to 0.16 for reactive_graph compatibility
- Fix web-sys ProgressElement -> ProgressEvent feature
- Resolve closure ownership issues in context_menu.rs and statusbar.rs
- Update Cargo dependencies for stable compilation

Cargo.toml

@@ -17,4 +17,4 @@ strip = true
 incremental = false
 
 [patch.crates-io]
-coarsetime = { path = "third_party/coarsetime" }
+coarsetime = { path = "third_party/coarsetime" }