feat: AI Chat panel with multi-provider support and tool calling

[Eistee82]

Summary

• Replaces the old OpenAI code generator dialog with a new AI Chat panel integrated into the script editor
• Supports multiple AI providers: OpenAI, Anthropic, Gemini, DeepSeek, and custom OpenAI-compatible endpoints (e.g. Ollama)
• Adds tool calling for smart home context: datapoint search, state reading, object info, script analysis
• Inline completions for Monaco editor with configurable provider
• Smart-apply for Blockly: AI-generated blocks are matched and replaced, with full undo/redo support
• Undo/redo toolbar buttons for both Blockly and text editors

Changes

New: AI Chat (src-editor/src/AiChat/)

• AiChatPanel.tsx — Main chat panel UI with provider/model selector
• AiChatInput.tsx — Chat input with @-mention autocomplete for scripts and devices
• AiChatMessage.tsx — Message rendering with syntax-highlighted code blocks
• AiChatService.ts — API config loading, model discovery, chat completion via sendTo
• AiToolExecutor.ts — Tool call execution (search datapoints, read states, analyze scripts)
• AiScriptAnalyzer.ts — Cross-script analysis and datapoint usage detection
• AiDatapointProvider.ts — Monaco autocomplete for ioBroker datapoint IDs
• AiInlineProvider.ts — AI inline completions for Monaco (with config caching)
• AiDiffView.tsx — Diff view for AI-suggested code changes
• useAiChat.ts — React hook managing chat state, message history, and tool loop

Modified

• src-editor/src/Editor.tsx — Integrates chat panel via split view, adds undo/redo buttons
• src-editor/src/Components/ScriptEditorVanillaMonaco.tsx — Registers inline + datapoint providers
• src/main.ts — Backend chatCompletion and testApiConnection message handlers with multi-provider HTTP routing

Removed

• src-editor/src/OpenAi/OpenAiDialog.tsx — Old code generator dialog (replaced by AI Chat)
• src-editor/src/OpenAi/OpenAiPrompt.tsx — Old prompt builder (replaced by AI Chat)

Other

• Added vitest for unit testing (src-editor/vitest.config.ts)
• 22 unit tests for AiChatService and AiScriptAnalyzer
• i18n translations for all 11 supported languages
• styled-components, jsdom, vitest added as dependencies in src-editor/package.json

Test plan

• Adapter starts without errors
• AI Chat panel opens in script editor (JS, TS, Blockly)
• Chat works with OpenAI, Gemini, DeepSeek providers
• @-mentions resolve scripts and devices correctly
• Tool calling executes (datapoint search, state reading) in agent mode
• Inline completions appear in Monaco editor
• Undo/redo buttons work in Blockly and text editors
• Smart-apply replaces matched Blockly blocks correctly
• npm run build passes
• npm run test passes (41 integration tests)
• npm run lint passes
• Vitest passes (22 unit tests)

🤖 Generated with Claude Code

[GermanBluefox]

lgtm