chore: apply cargo fmt across workspace and update docs

- Run cargo fmt on all Rust crates for consistent formatting
- Update CLAUDE.md with WASM plugin commands and dev.ps1 instructions
- Update wiki: add WASM plugin architecture, rewrite dev environment docs
- Minor frontend cleanup (unused imports)

crates/erp-config/src/module.rs

@@ -50,8 +50,7 @@ impl ConfigModule {
             )
             .route(
                 "/config/dictionaries/{dict_id}/items/{item_id}",
-                put(dictionary_handler::update_item)
-                    .delete(dictionary_handler::delete_item),
+                put(dictionary_handler::update_item).delete(dictionary_handler::delete_item),
             )
             // Menu routes
             .route(
@@ -62,8 +61,7 @@ impl ConfigModule {
             )
             .route(
                 "/config/menus/{id}",
-                put(menu_handler::update_menu)
-                    .delete(menu_handler::delete_menu),
+                put(menu_handler::update_menu).delete(menu_handler::delete_menu),
             )
             // Setting routes
             .route(
@@ -93,10 +91,7 @@ impl ConfigModule {
                 get(theme_handler::get_theme).put(theme_handler::update_theme),
             )
             // Language routes
-            .route(
-                "/config/languages",
-                get(language_handler::list_languages),
-            )
+            .route("/config/languages", get(language_handler::list_languages))
             .route(
                 "/config/languages/{code}",
                 put(language_handler::update_language),