Summary

• Adds the ability to select multiple traces/spans in a project and annotate them all at once with feedback scores
• New BatchAnnotateDialog component shows all configured feedback definitions (numerical, boolean, categorical) and lets users set scores to apply to all selected items
• New Annotate button (PenLine icon) in the traces action toolbar, enabled when rows are selected
• Scores are applied in parallel using the existing per-trace feedback score API

This addresses the feature request for production LLM-based app workflows where users apply filters and then want to annotate many traces at once instead of going one by one.

Files Changed

• apps/opik-frontend/src/components/pages-shared/traces/BatchAnnotateDialog/BatchAnnotateDialog.tsx (new) - Dialog component with inline score editors for each feedback definition
• apps/opik-frontend/src/components/pages/TracesPage/TracesSpansTab/TracesActionsPanel.tsx (modified) - Added Annotate button and BatchAnnotateDialog integration

How It Works

1. User selects one or more traces/spans using the checkbox column
2. The Annotate button (pen icon) becomes enabled in the toolbar
3. Clicking it opens a dialog listing all feedback definitions with score inputs
4. User sets values for one or more feedback scores
5. Clicking “Apply” sends the scores to all selected traces/spans in parallel
6. A success toast confirms the operation

Test plan

• Select multiple traces in a project, click Annotate button, verify dialog opens with feedback definitions
• Set numerical, boolean, and categorical scores in the dialog
• Click Apply and verify scores are applied to all selected traces
• Verify the button is disabled when no rows are selected
• Verify the dialog shows an appropriate message when no feedback definitions exist
• Verify it works for both traces and spans tabs

/claim #1010

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