Return a delete count from the delete-all response helpers

`response delete` had to run its own list first just to report how many
it removed, which duplicated the query the helper already does. Both
helpers now return the count instead.

`cmd_delete_all_http_responses` was returning the helper's value
directly, so it keeps its `()` result explicitly and the frontend
contract is unchanged.

crates-cli/yaak-cli/src/commands/response.rs

@@ -117,13 +117,8 @@ fn delete(ctx: &CliContext, id: &str, yes: bool) -> CommandResult {
             println!("Aborted");
             return Ok(());
         }
-        // The delete helpers return no count, so take one first to report honestly.
         let count = ctx
             .db()
-            .list_http_responses_for_request(id, None)
-            .map_err(|e| format!("Failed to list responses: {e}"))?
-            .len();
-        ctx.db()
             .delete_all_http_responses_for_request(id, &UpdateSource::Sync)
             .map_err(|e| format!("Failed to delete responses: {e}"))?;
         println!("Deleted {count} responses for request {id}");
@@ -137,10 +132,6 @@ fn delete(ctx: &CliContext, id: &str, yes: bool) -> CommandResult {
     }
     let count = ctx
         .db()
-        .list_http_responses(&workspace_id, None)
-        .map_err(|e| format!("Failed to list responses: {e}"))?
-        .len();
-    ctx.db()
         .delete_all_http_responses_for_workspace(&workspace_id, &UpdateSource::Sync)
         .map_err(|e| format!("Failed to delete responses: {e}"))?;
     println!("Deleted {count} responses for workspace {workspace_id}");

crates-tauri/yaak-app-client/src/lib.rs

@@ -1630,10 +1630,11 @@ async fn cmd_delete_all_http_responses<R: Runtime>(
     app_handle: AppHandle<R>,
     window: WebviewWindow<R>,
 ) -> YaakResult<()> {
-    Ok(app_handle.db().delete_all_http_responses_for_request(
+    app_handle.db().delete_all_http_responses_for_request(
         request_id,
         &UpdateSource::from_window_label(window.label()),
-    )?)
+    )?;
+    Ok(())
 }
 
 #[tauri::command]

crates/yaak-models/src/queries/http_responses.rs

@@ -30,29 +30,33 @@ impl<'a> ClientDb<'a> {
         self.find_many(HttpResponseIden::WorkspaceId, workspace_id, limit)
     }
 
+    /// Returns the number of responses deleted.
     pub fn delete_all_http_responses_for_request(
         &self,
         request_id: &str,
         source: &UpdateSource,
-    ) -> Result<()> {
+    ) -> Result<usize> {
         let responses = self.list_http_responses_for_request(request_id, None)?;
+        let count = responses.len();
         for m in responses {
             self.delete(&m, source)?;
         }
-        Ok(())
+        Ok(count)
     }
 
+    /// Returns the number of responses deleted.
     pub fn delete_all_http_responses_for_workspace(
         &self,
         workspace_id: &str,
         source: &UpdateSource,
-    ) -> Result<()> {
+    ) -> Result<usize> {
         let responses =
             self.find_many::<HttpResponse>(HttpResponseIden::WorkspaceId, workspace_id, None)?;
+        let count = responses.len();
         for m in responses {
             self.delete(&m, source)?;
         }
-        Ok(())
+        Ok(count)
     }
 
     pub fn delete_http_response(