Feat: Adapt Gemini chat history and improve session cleanup

Refactor: Improve logging and error handling

Refactor: Update Gemini chat history attribute access

feat: Add temporary debug prints to get_session_history endpoint

Refactor: Improve session history error handling and logging

Add session history API and auto-init session management

Refactor: Improve Gemini API input handling and session management

Refactor: Extract Gemini proxy logic into dedicated modules

Fix: Integrate chat history into Gemini proxy prompts

Fix: Ensure Gemini chat instance is always initialized

Refactor: Store Gemini chat instance in `_chat_instance`

Based on the provided git diff, here's the concise and descriptive commit message:

Add session management with max limit and LRU cache per token

Enhance Gemini image proxy with secure headers and config optimizations

Improve image proxy with Gemini cookie support and enhanced error handling

Fix: Use Response instead of StreamingResponse for transparent GIF

Refactor Gemini image processing to distinguish proxy and direct downloads

Enhance image handling and proxy fallback for Gemini responses

Refine Gemini image download and empty content handling

Increase image download timeout in Gemini proxy

Fix: Ensure Pydantic model serialization for API responses

Upgrade Pydantic and import List type

feat: Enhance API with rate limiting, metrics, and dynamic cookie reload

Feat: Improve image loading and authentication handling

将所有API Key相关表述和变量名称调整为认证令牌

修复图片显示问题：移除红框并添加后端图片代理

Optimize Gemini image proxy: Skip backend download for specific domains

Increase max redirects for image downloads

Refactor: Remove max_redirects from image download requests

feat(gemini-proxy): Extract and process embedded image URLs from text

Enhance image handling and streamline frontend parsing

Enhance error logging for Gemini image processing

Improve Gemini image proxying and streamline frontend image display

Remove aggressive text cleaning from Gemini proxy

Sanitize Gemini text output for cleaner content

Improve image MIME type detection and SSL handling

Fix: Enhance Gemini image handling and error logging

Feat: Embed Gemini images and improve health checks

feat: Add FastAPI HTTPException and JSONResponse imports

Refactor: Move health check and simplify Mermaid parsing

Feat: Display Gemini images and add metrics endpoint

feat: Enhance Gemini multimodal response display and optimize API calls

Refactor and enhance Gemini proxy and documentation

feat: Add image upload support for Gemini chat

Enhance logging and memory metrics; fix UI link

Simplify memory metrics output and update Hugging Face badge

feat: Add API call retries and UI loading indicator

feat: Improve metrics and display call records

Update memory metric and refine UI layout

feat: Implement memory usage tracking and optimize Docker build