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-server/migration/src/lib.rs

@@ -29,6 +29,7 @@ mod m20260413_000026_create_audit_logs;
 mod m20260414_000027_fix_unique_indexes_soft_delete;
 mod m20260414_000028_add_standard_fields_to_tokens;
 mod m20260414_000029_add_standard_fields_to_process_variables;
+mod m20260414_000032_fix_settings_unique_index_null;
 mod m20260415_000030_add_version_to_message_tables;
 mod m20260416_000031_create_domain_events;
 
@@ -69,6 +70,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260414_000029_add_standard_fields_to_process_variables::Migration),
             Box::new(m20260415_000030_add_version_to_message_tables::Migration),
             Box::new(m20260416_000031_create_domain_events::Migration),
+            Box::new(m20260414_000032_fix_settings_unique_index_null::Migration),
         ]
     }
 }