[UI] Create Backend Connection Status Component

[aceblack10]

Description:
Since Rick relies on a local Ollama instance, users need to know if the frontend is successfully communicating with the backend/LLM.

Tasks:

• Create a small "Status Indicator" component (e.g., a colored dot in the corner).
• Green: Connected to Backend & Ollama.
• Yellow: Connected to Backend, but Ollama is unreachable.
• Red: Backend offline.
• Place this in the placeholder dashboard layout.