feat: add options for adjusting LLM URL option

[Ali-Sab]

Add ability to change parameters and use API key for self-hosted LLMs like from Ollama, or other cloud providers that have OpenAI compatible endpoints.

[Copilot]

Pull request overview

Adds richer configuration for the “LLM URL” backend so users can use OpenAI-compatible/self-hosted endpoints (e.g., Ollama) with an optional API token and adjustable sampling parameters, and persists those settings through config storage and UI.

Changes:

• Extend the LLM URL settings UI with API token + “Advanced Options” (temperature/topP/maxTokens) and persist them.
• Add URL-backend maxTokens support in the main config service + tests.
• Add helper utilities + unit tests for URL settings payloads and activation-state logic, plus smoke tests for persistence/deactivation.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
packages/insomnia/src/ui/components/settings/llms/url.tsx	Adds API token + advanced parameter UI and uses new URL utilities when loading models/activating.
packages/insomnia/src/ui/components/settings/llms/url-utils.ts	Introduces URL helper utilities (schema, payload builders, activation disable logic, auth headers).
packages/insomnia/src/ui/components/settings/llms/url-utils.test.ts	Adds Vitest coverage for URL utilities.
packages/insomnia/src/ui/components/settings/ai-settings.tsx	Minor formatting-only arrow function cleanup.
packages/insomnia/src/main/llm-config-service.ts	Adds maxTokens to LLMConfig and parses it from plugin storage.
packages/insomnia/src/main/ipc/main.ts	Changes how MCP sampling request config is merged with stored model config.
packages/insomnia/src/main/tests/llm-config-service.test.ts	Adds tests covering URL numeric option parsing/saving.
packages/insomnia-smoke-test/tests/smoke/preferences-interactions.test.ts	Adds smoke tests for URL advanced option persistence and backend deactivation.

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