feat: safe deletion, album/asset delete, trash, README update

- volume-aware deletion: read-only volumes remove DB only, writable
  volumes soft-delete to trash with configurable grace period
- trash page with restore, worker purge sweep (TRASH_RETENTION_DAYS)
- album delete endpoint + sidebar trash icon
- asset delete from timeline selection toolbar
- all listing queries exclude trashed assets (deleted_at IS NULL)
- timeline ordered by EXIF capture date, date-summary endpoint
- README rewritten with features, setup, full env var table

crates/application/src/organization/commands/delete_album.rs

@@ -0,0 +1,31 @@
+use domain::{errors::DomainError, ports::AlbumRepository, value_objects::SystemId};
+use std::sync::Arc;
+
+pub struct DeleteAlbumCommand {
+    pub album_id: SystemId,
+    pub user_id: SystemId,
+}
+
+pub struct DeleteAlbumHandler {
+    repo: Arc<dyn AlbumRepository>,
+}
+
+impl DeleteAlbumHandler {
+    pub fn new(repo: Arc<dyn AlbumRepository>) -> Self {
+        Self { repo }
+    }
+
+    pub async fn execute(&self, cmd: DeleteAlbumCommand) -> Result<(), DomainError> {
+        let album = self
+            .repo
+            .find_by_id(&cmd.album_id)
+            .await?
+            .ok_or_else(|| DomainError::NotFound(format!("Album {} not found", cmd.album_id)))?;
+
+        if album.creator_user_id != cmd.user_id {
+            return Err(DomainError::Forbidden("Access denied".into()));
+        }
+
+        self.repo.delete(&cmd.album_id).await
+    }
+}

crates/application/src/organization/commands/mod.rs

@@ -1,9 +1,11 @@
 pub mod create_album;
+pub mod delete_album;
 pub mod manage_album_entries;
 pub mod tag_asset;
 pub mod update_album;
 
 pub use create_album::{CreateAlbumCommand, CreateAlbumHandler};
+pub use delete_album::{DeleteAlbumCommand, DeleteAlbumHandler};
 pub use manage_album_entries::{AlbumAction, ManageAlbumEntriesCommand, ManageAlbumEntriesHandler};
 pub use tag_asset::{TagAssetCommand, TagAssetHandler};
 pub use update_album::{UpdateAlbumCommand, UpdateAlbumHandler};

crates/application/src/organization/mod.rs

@@ -3,6 +3,7 @@ pub mod queries;
 
 pub use commands::{AlbumAction, ManageAlbumEntriesCommand, ManageAlbumEntriesHandler};
 pub use commands::{CreateAlbumCommand, CreateAlbumHandler};
+pub use commands::{DeleteAlbumCommand, DeleteAlbumHandler};
 pub use commands::{TagAssetCommand, TagAssetHandler};
 pub use commands::{UpdateAlbumCommand, UpdateAlbumHandler};
 pub use queries::get_album::{GetAlbumHandler, GetAlbumQuery};