Merge pull request #613 from AtalayaLabs/claude/performance-optimization-round-5

perf: round 5 — CalDAV cursor streaming, SPA interning gaps, NC href prefix, per-request micro-allocs

src/domain/repositories/calendar_event_repository.rs

@@ -25,6 +25,18 @@ pub trait CalendarEventRepository: Send + Sync + 'static {
     /// Finds a calendar event by its ID
     async fn find_event_by_id(&self, id: &Uuid) -> CalendarEventRepositoryResult<CalendarEvent>;
 
+    /// Cursor stream over every event of `calendar_id` in bundle order:
+    /// rows sorted by `(first occurrence per UID, uid, master-first,
+    /// start_time)` so a recurring master + its exception overrides
+    /// arrive adjacent and bundles appear in the first-appearance order
+    /// the buffered `start_time` listing produced. ONE scan+sort on the
+    /// server; the streaming CalDAV emitters cut pages at UID
+    /// boundaries so only a page of rows is ever resident.
+    fn stream_events_uid_order(
+        &self,
+        calendar_id: Uuid,
+    ) -> futures::stream::BoxStream<'static, CalendarEventRepositoryResult<CalendarEvent>>;
+
     /// Lists all events in a specific calendar
     async fn list_events_by_calendar(
         &self,

src/domain/repositories/drive_repository.rs

@@ -172,10 +172,14 @@ pub trait DriveRepository: Send + Sync + 'static {
     /// Returns rows in a stable order: default drive first (if any),
     /// then by display name. The `/api/drives` handler relies on that
     /// order for the picker UI without a follow-up sort.
+    /// Returned as `Arc<Vec<…>>`: warm hits are a refcount bump straight
+    /// off the per-user cache instead of a deep clone of every row's
+    /// Strings — this runs per DAV request with an explicit drive
+    /// selector.
     async fn list_readable_by(
         &self,
         caller_id: Uuid,
-    ) -> Result<Vec<DriveWithRootName>, DriveRepositoryError>;
+    ) -> Result<std::sync::Arc<Vec<DriveWithRootName>>, DriveRepositoryError>;
 
     /// `true` when the drive holds no live (non-trashed) folders other
     /// than its own root and no live files at all. Used by