Refactor Flash Attention option handling across frontend and backend: replace boolean fields with value-based fields for improved flexibility, update related structures and utility methods, and expand legal keywords and prompts for comprehensive analysis.

Integrate centralized error handling in Go backend: add reusable `HandleError` utilities, update `document-service.go` to use structured error contexts, and improve logging for technical and user-friendly messages. Update system prompts for consistent key formatting.

Refactor `DocumentQuestionState.jsx` to use `useReducer` for form state management, add form validation logic, streamline handlers, and improve keyword and history item handling. Update `App.jsx` to load saved settings on mount and improve styling consistency in `ChatMessageComponent.jsx`.

Refactor error handling and constants: centralize error response emission in `emitErrorResponse`, add handler type constants for clarity, update frontend payload structure, and expand legal keywords and prompts for comprehensive analysis.

Remove unused `GenerateSingleCompletionWithCancel` function: cleanup Go backend for streamlined functionality.

Update Go dependencies: bump versions for multiple modules, including `labstack/echo/v4`, `labstack/gommon`, `gorilla/websocket`, `leaanthony/u`, and others in `go.mod` and `go.sum`.

Remove unused components and utilities: eliminate `ChatHistoryManager`, `ChatSliceManager`, and `DocumentQueryHook` for codebase simplification.

Refactor state management and event handling: remove unused inference state slice, streamline BasePage methods, optimize Go backend for faster processing, and enhance Elasticsearch integrations with improved embedding vector handling and stop word removal.

Refactor `InferenceCompletionForm.jsx`: cleanup code style, improve formatting consistency, and enhance readability.Refactor `DocumentSearchForm.jsx`: cleanup code style, improve formatting consistency, and enhance readability.

Refactor event handling in chat and inference management: clean up unused imports, improve state reset logic, ensure explicit handling of `isLoading` state, and enhance error and cancellation message updates.

Refactor chat state management: modularize state actions, improve utility functions, enhance message handling, and streamline response event handling.

Refactor: remove unused code in Go backend and JavaScript frontend for streamlined functionality

Refactor embedding and event handling: add mutex to prevent concurrent operations, enhance document request handling with detailed progress and response events, update frontend for improved compatibility and event naming consistency, and migrate elasticsearch docker references.

Refactor document parsing and state management: improve progress tracking, error handling, and event-driven updates; migrate PDF export functionalities; enhance store utilities with validations, debugging, and persistence handling; clean up unused code.

Refactor document parsing and state management: improve progress tracking, error handling, and event-driven updates; migrate PDF export functionalities; enhance store utilities with validations, debugging, and persistence handling; clean up unused code.