[FEAT]: UI Fallback and popup for missing LLM field input

[marcvergees]

📝 Description

Implement a UI fallback for cases when the LLM (large language model) doesn't fill a form field as expected. When this happens, a popup window should appear to let the user directly input the required data.

💡 Rationale

Currently, if the LLM is unable to fill a field, the response is a -1. Allowing the user to manually enter data ensures no information gaps, improving reliability and user experience in automated workflows.

🛠️ Proposed Solution

• Detect when the LLM fails to fill a required field (-1)
• Trigger a popup window via UI to prompt for user input
• Accept user input and fill the missing form field
• Integrate fallback logic within the existing form handling pipeline

✅ Acceptance Criteria

• UI fallback correctly triggers when LLM does not fill a field
• User can input missing data in a popup
• Data is processed as if filled by the LLM
• Feature works entirely in Docker container setups
• Documentation updated in docs/
• JSON output validates against the schema

📌 Additional Context

This provides a seamless backup mechanism for form completion in FireForm, especially helpful for critical fields or unreliable LLM completions.