Enhanced Billing, Canvas, Plans, and Media Management

Added:

• Plan downgrade modal now shows monthly reel generation limits.
• AI-generated posts and reels translations added for multiple languages.
• New features improve media asset and folder organization.
• Users can now retrieve videos from Pexels via API.
  Improved:
• Billing page simplifies post approval status display.
• Canvas text backgrounds adapt to user settings.
• Canvas reel player logo size is more customizable.
• Plan list tooltips are clearer and more concise.
• Post failure emails include detailed errors and next steps.