enhancements: Modified the AI Generate Logic to be more robust and generate 2D figures.

[Vaibhav-Kumar10]

1. Accept an available_components whitelist and strengthen AI diagram generation and validation.
2. Backend:

• api/views now forwards optional available_components to core/gemini_service; gemini_service accepts the list,
• builds a stricter system prompt, falls back to defaults, parses and validates AI JSON (component ids/types, connection references) and
• returns structured errors.

3. Frontend:

• projectApi signature updated to send available_components;
• Editor collects and normalizes existing component types, sends them to the API, pre-validates AI-generated components, uses AI coordinates when provided, maps IDs to added items, and
• robustly creates connections (dynamic grip selection).

4. aiMatcher:

• added normalizeType mapping, explicit types, and generic-safe matchComponent improvements.