Context Providers - modals should be have their own provider

Current organization is stacking up quickly in data provider & auth.
For separation of concerns it's best to create a new provider for modals and handle their operations from there.

查看現有的 data 與 auth provider 以了解目前 context 結構。識別目前在哪裡處理 modal 的狀態與邏輯。為 modals 建立新的 React context provider，並將相關的 state 與函式從現有 provider 移到其中。確保新 provider 已整合到應用程式的根 component 階層中。

由索引模型根據 Issue 內容生成。