perf(draft): optimize memory layout by removing double indirection & implemented optimistic locking via Arc::ptr_eq for with_data_modify (#5942)

* perf(draft): optimize memory layout by removing double indirection

- Replace `Arc<Box<T>>` with `Arc<T>` to reduce pointer chasing and memory overhead.
- Leverage `Arc::from(Box<T>)` in async modify path for efficient ownership transfer.
- Fix race conditions in `edit_draft` by ensuring atomicity under write lock.
- Performance improved by ~16-24% across all operations (based on Criterion bench).

Benchmarks:
- latest_arc:     41.1ns (-24.2%)
- edit_draft:     92.2ns (-17.6%)
- apply:          89.8ns (-17.7%)
- async_modify:   66.0ns (-16.6%)

* perf(draft): implemented optimistic locking via Arc::ptr_eq for with_data_modify

Benchmarks confirm only a negligible ~2% (1.3ns) overhead for async operations, ensuring total data integrity during concurrent updates.

src-tauri/src/feat/config.rs

@@ -4,7 +4,7 @@ use crate::{
     module::{auto_backup::AutoBackupManager, lightweight},
 };
 use anyhow::Result;
-use clash_verge_draft::SharedBox;
+use clash_verge_draft::SharedDraft;
 use clash_verge_logging::{Type, logging, logging_error};
 use serde_yaml_ng::Mapping;
 
@@ -269,7 +269,7 @@ pub async fn patch_verge(patch: &IVerge, not_save_file: bool) -> Result<()> {
     Ok(())
 }
 
-pub async fn fetch_verge_config() -> Result<SharedBox<IVerge>> {
+pub async fn fetch_verge_config() -> Result<SharedDraft<IVerge>> {
     let draft = Config::verge().await;
     let data = draft.data_arc();
     Ok(data)