fix: add Origin header for Ollama requests to fix Forbidden error

[devin-ai-integration]

Summary

Fixes #2123 - Ollama returning "Forbidden" errors when making chat completion requests from Hyprnote.

Root cause: Ollama's CORS check rejects requests without a recognized Origin header. The tauriFetch client (from @tauri-apps/plugin-http) doesn't set an Origin header by default, while the browser's native fetch (used by ollama/browser for model listing) does. This explains why model listing works but chat completions fail.

Fix: Add a dedicated case "ollama": in createLanguageModel that wraps tauriFetch with an explicit Origin: http://localhost header, which is in Ollama's default allowed origins list.

Review & Testing Checklist for Human

• Test with Ollama locally: Configure Hyprnote to use Ollama with default OLLAMA_ORIGINS settings (not *) and verify chat completions work without "Forbidden" errors
• Verify the Origin value: Confirm http://localhost is correct for Ollama's default allowed origins (may need http://127.0.0.1 instead depending on Ollama version)
• Test model listing still works: Ensure the existing model listing functionality via ollama/browser is unaffected

Notes

• The hardcoded http://localhost Origin value is based on Ollama's documented default allowed origins. If users have Ollama bound to a different interface, they may still need to configure OLLAMA_ORIGINS.
• This change only affects the Ollama provider; other providers (LM Studio, custom) continue using the default tauriFetch without Origin header modification.

Link to Devin run: https://app.devin.ai/sessions/49d4440bff114df891854c314c720cb1
Requested by: yujonglee (@yujonglee)

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR that start with 'DevinAI' or '@devin'.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[netlify]

✅ Deploy Preview for hyprnote ready!

Name	Link
🔨 Latest commit	5c29d0e
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote/deploys/693792c2406d7400084acaca
😎 Deploy Preview	https://deploy-preview-2178--hyprnote.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[netlify]

✅ Deploy Preview for hyprnote-storybook ready!

Name	Link
🔨 Latest commit	5c29d0e
🔍 Latest deploy log	https://app.netlify.com/projects/hyprnote-storybook/deploys/693792c2a7dc610008378911
😎 Deploy Preview	https://deploy-preview-2178--hyprnote-storybook.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.