**Problem 1: Chat interface not refreshing when resetting imported messages**
- The "reset messages simultaneously" option during config import failed to
update the chat interface properly
- Normal conversation resets worked correctly
**Problem 2: Messages stuck in loading state after page refresh**
- When AI was generating a response and user refreshed the page, the message
remained in loading state indefinitely
- Stop button had no effect on these orphaned loading messages
**Changes Made:**
1. **Fixed config reset message refresh** (`usePlaygroundState.js`):
```javascript
// Clear messages first, then set defaults to force component re-render
setMessage([]);
setTimeout(() => {
setMessage(DEFAULT_MESSAGES);
}, 0);
```
2. **Enhanced stop generator functionality** (`useApiRequest.js`):
```javascript
// Handle orphaned loading messages even without active SSE connection
const onStopGenerator = useCallback(() => {
// Close active SSE if exists
if (sseSourceRef.current) {
sseSourceRef.current.close();
sseSourceRef.current = null;
}
// Always attempt to complete any loading/incomplete messages
// ... processing logic
}, [setMessage, applyAutoCollapseLogic, saveMessages]);
```
3. **Added automatic message state recovery** (`usePlaygroundState.js`):
```javascript
// Auto-fix loading/incomplete messages on page load
useEffect(() => {
const lastMsg = message[message.length - 1];
if (lastMsg.status === MESSAGE_STATUS.LOADING ||
lastMsg.status === MESSAGE_STATUS.INCOMPLETE) {
// Process incomplete content and mark as complete
// Save corrected message state
}
}, []);
```
**Root Cause:**
- Config reset: Direct state assignment didn't trigger component refresh
- Loading state: No recovery mechanism for interrupted SSE connections after refresh
**Impact:**
- ✅ Config reset now properly refreshes chat interface
- ✅ Stop button works on orphaned loading messages
- ✅ Page refresh automatically recovers incomplete messages
- ✅ No more permanently stuck loading states
When using the "reset messages simultaneously" option during config import,
the conversation messages in the chat interface were not being properly reset,
while normal conversation resets worked correctly.
**Changes:**
- Modified `handleConfigReset` in `usePlaygroundState.js` to clear messages
before setting default examples
- Added asynchronous message update to force Chat component re-render
- Ensures immediate UI refresh when resetting imported conversation data
**Root Cause:**
The direct assignment to DEFAULT_MESSAGES didn't trigger a complete
component refresh, causing the chat interface to display stale data.
**Solution:**
```javascript
// Before
setMessage(DEFAULT_MESSAGES);
// After
setMessage([]);
setTimeout(() => {
setMessage(DEFAULT_MESSAGES);
}, 0);
```
This two-step approach forces the Chat component to unmount and remount
with fresh data, resolving the display inconsistency.
- Modify saveMessagesImmediately to accept messages parameter
- Pass updated message list to all save calls instead of relying on closure
- Ensure complete message history is saved including the last message
- Fix timing issue where old message state was being saved
This fixes the issue where the last conversation was not being persisted to localStorage.
- Refactor message saving strategy from automatic to manual saving
- Save messages only on key operations: send, complete, edit, delete, role toggle, clear
- Prevent frequent localStorage writes during streaming responses
- Remove excessive console logging
- Remove all console.log statements from save/load operations
- Clean up debug logs to reduce console noise
- Optimize initial state loading with lazy initialization
- Replace useRef with useState lazy initialization for config and messages
- Ensure loadConfig and loadMessages are called only once on mount
- Prevent redundant localStorage reads during re-renders
- Update hooks to support new save strategy
- Pass saveMessages callback through component hierarchy
- Add saveMessagesImmediately to relevant hooks (useApiRequest, useMessageActions, useMessageEdit)
- Trigger saves at appropriate lifecycle points
This significantly improves performance by reducing localStorage I/O operations
from continuous writes during streaming to discrete saves at meaningful points.
- Add CustomRequestEditor component with JSON validation and real-time formatting
- Implement bidirectional sync between chat messages and custom request body
- Add persistent local storage for chat messages (separate from config)
- Remove redundant System Prompt field in custom mode
- Refactor configuration storage to separate messages and settings
New Features:
• Custom request body mode with JSON editor and syntax highlighting
• Real-time bidirectional synchronization between chat UI and custom request body
• Persistent message storage that survives page refresh
• Enhanced configuration export/import including message data
• Improved parameter organization with collapsible sections
Technical Changes:
• Add loadMessages/saveMessages functions in configStorage
• Update usePlaygroundState hook to handle message persistence
• Refactor SettingsPanel to remove System Prompt in custom mode
• Add STORAGE_KEYS constants for better storage key management
• Implement debounced auto-save for both config and messages
• Add hash-based change detection to prevent unnecessary updates
UI/UX Improvements:
• Disabled state styling for parameters in custom mode
• Warning banners and visual feedback for mode switching
• Mobile-responsive design for custom request editor
• Consistent styling with existing design system
- Cache initial config using useRef to prevent repeated loadConfig() calls
- Fix useEffect dependencies to only trigger on actual config changes
- Modify debouncedSaveConfig dependency from function reference to actual config values
- Update handleConfigReset to use DEFAULT_CONFIG directly instead of reloading
- Prevent excessive console logging during chat interactions and frequent re-renders
This resolves the issue where console was flooded with:
"配置已从本地存储加载" and "配置已保存到本地存储" messages,
especially during active chat sessions where logs appeared every second.
Fixes: Frequent config load/save operations causing performance issues
Completely restructured the Playground component from a 1437-line monolith
into a maintainable, modular architecture with 62.4% code reduction (540 lines).
**Key Improvements:**
- **Modular Architecture**: Extracted business logic into separate utility files
- `utils/constants.js` - Centralized constant management
- `utils/messageUtils.js` - Message processing utilities
- `utils/apiUtils.js` - API-related helper functions
- **Custom Hooks**: Created specialized hooks for better state management
- `usePlaygroundState.js` - Centralized state management
- `useMessageActions.js` - Message operation handlers
- `useApiRequest.js` - API request management
- **Code Quality**: Applied SOLID principles and functional programming patterns
- **Performance**: Optimized re-renders with useCallback and proper dependency arrays
- **Maintainability**: Implemented single responsibility principle and separation of concerns
**Technical Achievements:**
- Eliminated code duplication and redundancy
- Replaced magic strings with typed constants
- Extracted complex inline logic into pure functions
- Improved error handling and API response processing
- Enhanced code readability and testability
**Breaking Changes:** None - All existing functionality preserved
This refactor transforms the codebase into enterprise-grade quality following
React best practices and modern development standards.
