Show Loading Spinner During AI Analysis

[Komal2008]

Description

While the AI is processing the uploaded image, users should see a loading indicator.

Requirements

• Display a spinner.
• Disable the Analyze button.
• Show "Analyzing image..." message.

[its-Sohan]

Fixed in PR #5 — added analyzing session state flag that disables the button during AI processing and shows 'Analyzing image...' text.