Code Quality: Duplicate Imports and Missing Error Handling

[purvanshjoshi]

Description

The codebase has several code quality issues that need to be addressed:

1. Duplicate Imports in main.py:

   • Line 8: rom pydantic import BaseModel
   • Line 12: rom pydantic import BaseModel (duplicate)

2. Missing Error Handling:

   • WebSocket connections lack proper error handling for disconnects
   • File operations don't handle all edge cases

3. Resource Leaks:

   • WebSocket connections may not be properly closed in all scenarios
   • GitNexus process management could be improved

Proposed Fix

1. Remove duplicate imports:
   `python

   Remove line 12: from pydantic import BaseModel

   `

2. Add comprehensive error handling:

   • Add try-catch blocks around WebSocket operations
   • Implement proper cleanup in finally blocks
   • Add timeout handling for long-running operations

3. Improve resource management:

   • Use context managers for file operations
   • Implement proper WebSocket connection lifecycle management
   • Add health checks for GitNexus process

Code Examples

Before:
`python
from pydantic import BaseModel

... other imports

from pydantic import BaseModel # Duplicate
`

After:
`python
from pydantic import BaseModel

... other imports (no duplicate)

`

Acceptance Criteria

1. All duplicate imports are removed
2. Error handling is added for all critical operations
3. Resource cleanup is properly implemented
4. Code passes linting checks (black, flake8)
5. No emojis in any codebase changes or commits

Impact

MEDIUM - These issues affect:

• Code maintainability and readability
• System reliability and error recovery
• Developer experience when debugging issues