Fix Ollama API URL normalization by removing trailing slashes

[Naam]

Related GitHub Issue

Closes: #6078

Roo Code Task Context (Optional)

Description

Ensures consistent behavior when constructing API endpoint URLs by normalizing the base URL to remove any trailing slashes. This prevents issues when the base URL is provided with trailing slashes.

Test Procedure

Added tests to verify URL normalization works correctly with:

• URLs with a single trailing slash
• URLs with multiple trailing slashes
• URLs without trailing slashes

Pre-Submission Checklist

• Issue Linked: This PR is linked to an approved GitHub Issue (see "Related GitHub Issue" above).
• Scope: My changes are focused on the linked issue (one major feature/fix per PR).
• Self-Review: I have performed a thorough self-review of my code.
• Testing: New and/or updated tests have been added to cover my changes (if applicable).
• Documentation Impact: I have considered if my changes require documentation updates (see "Documentation Updates" section below).
• Contribution Guidelines: I have read and agree to the Contributor Guidelines.

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Documentation Updates

Does this PR necessitate updates to user-facing documentation?

• No documentation updates are required.
• Yes, documentation updates are required. (Please describe what needs to be updated or link to a PR in the docs repository).

Additional Notes

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Important

Normalize ollamaBaseUrl in CodeIndexOllamaEmbedder to remove trailing slashes, ensuring consistent API endpoint construction.

• Behavior:
  • Normalize ollamaBaseUrl in CodeIndexOllamaEmbedder constructor to remove trailing slashes.
  • Ensures consistent API endpoint construction.
• Tests:
  • Added tests in ollama.spec.ts for URLs with single, multiple, and no trailing slashes.
  • Verifies that API calls use normalized URLs without trailing slashes.

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