Implement Gemini API with OpenAI-compatible endpoint.

[oupadhyay]

This PR fixes #58.

Core AI provider enhancements:

• Added full Gemini AI provider support in AIContext with proper model defaults
• Implemented Gemini embedding support using OpenAI-compatible endpoint
• Disabled reasoning/thinking for all Gemini models to prevent nonsensical responses
• Fixed role assignment in prepareCompletionContext to treat all posts as user messages
• Added maxTokens limit of 500 for all AI completions (@UdaraJay thoughts?)

Model persistence and provider switching:

• Implemented proper provider switching logic that preserves compatible models
• Added intelligent model matching to prevent unnecessary resets during initialization
• Enhanced provider change detection to distinguish between user actions and stored value loading

Testing improvements:

• Introduced comprehensive AIContext test suite validating initialization and provider switching
• Updated jest setup to include jest-fetch-mock for API testing
• Enhanced test coverage for components with routing context
• Improved test reliability with better mocking and async handling

Performance optimizations:

• Fixed React context re-rendering issues by wrapping AIContextValue in useMemo
• Memoized getAvailableModels and checkApiKeyValidity functions with useCallback
• Prevented unnecessary re-renders of components consuming AIContext

Bug fixes:

• Corrected malformed HTML output in search highlighting functionality
• Fixed ESLint violations in test files
• Refactored imports in various components for consistency

[oupadhyay]

[oupadhyay]

Hey @UdaraJay, can I get an review for this?

[UdaraJay]

Hey! Thanks for the PR! I'll test these out soon.

At a glance feedback for now--

• Exclude any lock files from the PRs.
• It looks like adding the gemini tab removed some of the tab design. What I would suggest is simply making the OpenAI tab a generic "Remote AI" tab and having generic configuration that supports any provider there.

[oupadhyay]

[Copilot]

Pull Request Overview

This PR integrates full Gemini provider support alongside OpenAI in the AI context, refactors the settings UI for dynamic provider selection and debounced inputs, and implements streaming AI completions via Electron IPC while updating several components and tests for consistency.

• Added Gemini support in AIContext with proper defaults, provider switching, HTML-to-text conversion, and streaming via main-process IPC.
• Refactored AISettingsTabs to unify remote provider settings (OpenAI/Gemini), add debounced inputs, and remember per-provider models.
• Updated Editor, LinkPreview, and embedding utilities to support the new providers, added PropTypes, and improved accessibility and testing setup.

Reviewed Changes

Copilot reviewed 23 out of 24 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/renderer/pages/Pile/Settings/AISettingsTabs/index.jsx	Unified tabs into a “remote” provider, added debounced state and per-provider model memory
src/renderer/pages/Pile/Settings/AISettingsTabs/AISettingTabs.module.scss	Adjusted select styling, spacing, and min-width for responsive layout
src/renderer/pages/Pile/Editor/index.jsx	Integrated AI streaming responses, updated paste/drop handlers, added PropTypes
src/renderer/pages/Pile/Editor/LinkPreviews/LinkPreview/index.jsx	Refactored to fetch previews via context hook, added accessibility roles and PropTypes
src/renderer/pages/Pile/Chat/Message/index.js	Removed unused Markdown import
src/renderer/pages/License/index.tsx	Removed unused TrashIcon import
src/renderer/pages/CreatePile/index.tsx	Fixed relative imports, replaced invalid placeholder on <button>
src/renderer/icons/img/CardIcon.js	Converted SVG attributes to React props (fillRule, strokeLinecap), adjusted export form
src/renderer/icons/img/BoxOpenIcon.js	Same SVG attribute fixes and export form
src/renderer/context/AIContext.js	Added Gemini defaults, provider-switch logic, HTML-to-text helper, streaming IPC
src/main/utils/pileEmbeddings.js	Extended embedding logic to support Ollama, Gemini, and OpenAI clients
src/main/preload.ts	Broadened IPC channel typing
src/main/ipc.ts	Registered new AI handlers
src/main/handlers/ai.ts	Implemented ai-generate-completion and streaming with Gemini reasoning disabled
src/tests/jest.setup.js	Configured jest-fetch-mock, HTML-to-text mocking, global React mocks
src/tests/Editor.test.js	Added comprehensive tests for highlight logic
src/tests/App.test.tsx	Expanded route and context mocking
src/tests/AIContext.test.js	Covered provider switching, key validity, and streaming setup
package.json	Switched build scripts to pnpm, updated Jest and Testing-Library config

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

Comments suppressed due to low confidence (7)

src/renderer/pages/Pile/Editor/LinkPreviews/LinkPreview/index.jsx:4

• You call getLink inside the effect but never destructure it from the context. Add const { getLink } = useLinksContext(); before using it.

import { useLinksContext } from 'renderer/context/LinksContext';

src/main/utils/pileEmbeddings.js:146

• axios is not imported in this file. You need const axios = require('axios'); or switch to the OpenAI client you imported.

const response = await axios.post(url, data);

src/renderer/icons/img/CardIcon.js:9

• Inline // comments are not valid inside JSX props. Move this ESLint-disable above the JSX element or use a {/* ... */} comment block.

// eslint-disable-next-line react/jsx-props-no-spreading

src/renderer/icons/img/BoxOpenIcon.js:9

• JSX does not support // comments within tag attributes. Either lift this comment above the <svg> or convert to {/* eslint-disable-next-line ... */}.

// eslint-disable-next-line react/jsx-props-no-spreading

src/renderer/pages/Pile/Editor/index.jsx:116

• Tiptap's handlePaste signature is (view, event, slice). Changing it to handlePaste(event) will break paste handling. Restore the correct parameter list.

handlePaste(event) {

src/renderer/pages/Pile/Editor/index.jsx:131

• Tiptap's handleDrop signature is (view, event, slice, moved). Removing view and slice parameters will break drop handling; restore the original signature.

handleDrop(event, moved) {

src/renderer/pages/Pile/Editor/index.jsx:329

• The // eslint-disable-next-line react/no-danger comment is placed within JSX attributes, which is invalid syntax. Move it above the element or use a JSX comment block.

// eslint-disable-next-line react/no-danger