修复因rstrip导致的bug

[bebestmaple]

No description provided.

[Copilot]

Pull request overview

This PR fixes a critical bug in URL processing where rstrip('/v1') was incorrectly used to remove the /v1 suffix from base URLs. The issue is that rstrip() treats its argument as a set of characters to remove, not as a complete suffix, which could lead to incorrect URL manipulation (e.g., removing multiple 'v' and '1' characters).

Key Changes:

• Replaced .rstrip('/').rstrip('/v1') with a proper suffix check using .endswith('/v1') followed by string slicing [:-3]
• Applied the fix consistently across three locations: text client initialization and two API testing functions

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
backend/utils/text_client.py	Fixed base_url processing in TextChatClient initialization to correctly remove '/v1' suffix
backend/routes/config_routes.py	Fixed base_url processing in _test_openai_compatible() and _test_image_api() functions to correctly handle '/v1' suffix removal

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.