Refactor: 重构会话和模型控制区域样式，优化按钮和状态文本布局

Feat: Adapt Gemini chat history and improve session cleanup

Refactor: Improve logging and error handling

Set default log level to INFO for app and Uvicorn access

Refactor: Update Gemini chat history attribute access

Fallback to transparent GIF for failed image proxy

Force clear current session key on init

feat: Display new session in tabs immediately

Enhance session loading and error handling

feat: Implement local session fallback for new sessions

feat: Generate default session name for new sessions

Add debug logs for session management initialization

feat: Add temporary debug prints to get_session_history endpoint

Refactor: Improve session history error handling and logging

Add temporary debug log for login form setup

Set log level to DEBUG for authentication debugging

Redirect to main page after successful login

Refactor: Streamline session initialization flow

Refine login success and enhance session creation logging

Fix: Initialize session management on root path

Refactor session tab management to separate rendering and reduce fetches

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

Based on the git diff, here's the commit message:

Ensure current session history is loaded during initialization

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

Refactor UI: Group session tabs with model selector

Fix: Ensure Gemini chat instance is always initialized

Refactor: Store Gemini chat instance in `_chat_instance`

Refine CSS positioning for improved layout and context

Force static positioning for session container

Refactor: Move session tab bar structure to HTML

Modularize frontend CSS and JavaScript assets

Feat: Redesign session management to use tabs

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

Fix(Dockerfile): Set explicit uvicorn port to 7860

Upgrade Pydantic and import List type

Bump loguru to 0.7.3

Update httpx dependency to version 0.28.1