Refactor and organize existing code

CODE_REFACTORING_SUMMARY.md

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+# Code Quality Improvements Summary
+
+This document outlines the major refactoring improvements made to enhance code organization, maintainability, and scalability.
+
+## Major Improvements
+
+### 1. Create Post Form Component Refactoring
+
+**Before:** 
+- Single massive file: `src/components/create-post-form.tsx` (911 lines)
+- Multiple responsibilities mixed in one component
+- Hard to maintain and test
+
+**After:**
+- Modular component structure with focused responsibilities:
+  - `src/components/create-post-form/types.ts` - Shared types and interfaces
+  - `src/components/create-post-form/hooks/use-post-form-state.ts` - Form state management
+  - `src/components/create-post-form/hooks/use-ai-generation.ts` - AI generation logic
+  - `src/components/create-post-form/ai-generation-panel.tsx` - AI generation UI
+  - `src/components/create-post-form/destination-selector.tsx` - Destination selection UI
+  - `src/components/create-post-form/post-actions.tsx` - Action buttons (publish/schedule)
+  - `src/components/create-post-form/create-post-form.tsx` - Main orchestrating component
+  - `src/components/create-post-form/index.ts` - Re-exports
+
+**Benefits:**
+- ✅ Single Responsibility Principle
+- ✅ Better testability
+- ✅ Easier maintenance
+- ✅ Reusable components and hooks
+- ✅ Type safety maintained
+- ✅ Clear separation of concerns
+
+### 2. Posts Functions Refactoring
+
+**Before:**
+- Single large file: `src/functions/posts.ts` (329 lines)
+- Multiple unrelated functions in one file
+
+**After:**
+- Modular function structure:
+  - `src/functions/posts/create-post.ts` - Post creation logic
+  - `src/functions/posts/destinations.ts` - Destination-related functions
+  - `src/functions/posts/post-management.ts` - CRUD operations
+  - `src/functions/posts/recent-posts.ts` - Recent posts fetching
+  - `src/functions/posts/index.ts` - Re-exports
+
+**Benefits:**
+- ✅ Related functions grouped together
+- ✅ Easier to locate specific functionality
+- ✅ Better maintainability
+- ✅ Reduced file size for focused changes
+
+### 3. Integrations Functions Refactoring
+
+**Before:**
+- Single file: `src/functions/integrations.ts` (140 lines)
+- Mixed responsibilities
+
+**After:**
+- Focused modules:
+  - `src/functions/integrations/integration-management.ts` - Basic CRUD operations
+  - `src/functions/integrations/platform-credentials.ts` - Credential management
+  - `src/functions/integrations/index.ts` - Re-exports
+
+**Benefits:**
+- ✅ Clear separation between integration management and credentials
+- ✅ Easier to maintain credential-related logic
+- ✅ Better organization
+
+## Key Principles Applied
+
+### 1. **Single Responsibility Principle**
+- Each module/component has one clear purpose
+- Functions and components are focused on specific tasks
+
+### 2. **Separation of Concerns**
+- UI components separated from business logic
+- State management extracted to custom hooks
+- Server functions organized by domain
+
+### 3. **Type Safety**
+- All types consolidated in dedicated type files
+- No redundant type declarations
+- Maintained strict TypeScript compliance
+
+### 4. **Modularity**
+- Code split into logical, reusable modules
+- Clear import/export structure
+- Easy to extend and modify
+
+### 5. **Maintainability**
+- Smaller, focused files are easier to understand
+- Clear naming conventions
+- Consistent patterns throughout
+
+## File Structure Before vs After
+
+### Before
+```
+src/
+├── components/
+│   └── create-post-form.tsx (911 lines - TOO LARGE)
+├── functions/
+│   ├── posts.ts (329 lines - TOO LARGE)
+│   └── integrations.ts (140 lines - MIXED CONCERNS)
+```
+
+### After
+```
+src/
+├── components/
+│   ├── create-post-form.tsx (re-exports)
+│   └── create-post-form/
+│       ├── types.ts
+│       ├── hooks/
+│       │   ├── use-post-form-state.ts
+│       │   └── use-ai-generation.ts
+│       ├── ai-generation-panel.tsx
+│       ├── destination-selector.tsx
+│       ├── post-actions.tsx
+│       ├── create-post-form.tsx
+│       └── index.ts
+├── functions/
+│   ├── posts.ts (re-exports)
+│   ├── posts/
+│   │   ├── create-post.ts
+│   │   ├── destinations.ts
+│   │   ├── post-management.ts
+│   │   ├── recent-posts.ts
+│   │   └── index.ts
+│   ├── integrations.ts (re-exports)
+│   └── integrations/
+│       ├── integration-management.ts
+│       ├── platform-credentials.ts
+│       └── index.ts
+```
+
+## Benefits Achieved
+
+1. **Reduced Complexity**: Large files split into manageable, focused modules
+2. **Improved Maintainability**: Easier to locate and modify specific functionality
+3. **Better Testability**: Smaller, focused units are easier to test
+4. **Enhanced Reusability**: Components and hooks can be reused across the application
+5. **Clearer Architecture**: Obvious separation between UI, state management, and business logic
+6. **Type Safety**: All types properly organized and no redundancy
+7. **Future-Proof**: Easy to extend with new features
+
+## Migration Impact
+
+- **Zero Breaking Changes**: All existing imports continue to work through re-exports
+- **Backward Compatibility**: Existing code doesn't need modification
+- **Gradual Adoption**: New code can immediately benefit from the improved structure
+
+This refactoring significantly improves code quality while maintaining the lean, type-safe approach requested.