Add historical retention field to FSRS review request and update related logic

- Added `historical_retention` field to `SimulateFsrsReviewRequest` in `scheduler.proto`.
- Updated `simulator.rs` to use `req.historical_retention` instead of the removed `desired_retention`.
- Modified `FsrsOptions.svelte` to include `historicalRetention` in the options passed to the component.

proto/anki/scheduler.proto

@@ -404,6 +404,7 @@ message SimulateFsrsReviewRequest {
   repeated float easy_days_percentages = 10;
   deck_config.DeckConfig.Config.ReviewCardOrder review_order = 11;
   optional uint32 suspend_after_lapse_count = 12;
+  float historical_retention = 13;
 }
 
 message SimulateFsrsReviewResponse {

rslib/src/scheduler/fsrs/simulator.rs

@@ -146,7 +146,6 @@ impl Collection {
         let new_cards =
             cards.iter().filter(|c| c.queue == CardQueue::New).count() + req.deck_size as usize;
         let fsrs = FSRS::new(Some(&req.params))?;
-        let historical_retention = req.desired_retention;
         let mut converted_cards = cards
             .into_iter()
             .filter(is_included_card)
@@ -157,7 +156,7 @@ impl Collection {
                         .memory_state_from_sm2(
                             c.ease_factor(),
                             c.interval as f32,
-                            historical_retention,
+                            req.historical_retention,
                         )
                         .ok()?
                         .into(),

ts/routes/deck-options/FsrsOptions.svelte

@@ -95,6 +95,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
         newCardsIgnoreReviewLimit: $newCardsIgnoreReviewLimit,
         easyDaysPercentages: $config.easyDaysPercentages,
         reviewOrder: $config.reviewOrder,
+        historicalRetention: $config.historicalRetention,
     });
 
     const DESIRED_RETENTION_LOW_THRESHOLD = 0.8;