## Summary
Fixed grammar errors and improved clarity in prompt templates throughout
`rag/prompts.py`.

## Changes Made
- **Fixed incomplete sentence**: `"If the user's latest question is
completely, don't do anything"` → `"If the user's latest question is
already complete, don't do anything"`
- **Improved phrasing**: `"of like [ID:i]"` → `"such as [ID:i]"`
- **Added missing articles**: `"give top 3"` → `"give the top 3"`
- **Fixed prepositions**: `"in language of"` → `"in the same language
as"`
- **Corrected spelling**: `"Jappanese"` → `"Japanese"`
- **Standardized formatting**: Consistent role descriptions and
punctuation

## Impact
These changes improve prompt readability and should make instructions
clearer for the underlying language models.

## Test Plan
- [x] Verified changes maintain original prompt functionality
- [x] No breaking changes to prompt structure or expected outputs

Co-authored-by: Adrian Altermatt <adrian.altermatt@fgcz.uzh.ch>