fix: WYSIWYG editor, content generation, and writing assistant bug fixes

- Fix text selection menu not showing: wire contentRef via inputRef on multiline TextField
- Fix blog title not truncating: add min-w-0 for flex item overflow
- Fix outline generation 500: escape curly braces in f-string prompt template
- Fix content generation 'NoneType not callable': replace SessionLocal() with get_session_for_user(), add db param to MediumBlogGenerator, fix signature mismatch in database_task_manager
- Fix writing assistant suggest 500: add auth + user_id to API endpoint and service, replace sync requests with httpx.AsyncClient
- Fix hallucination detector 404: explicitly include router in main.py and app.py
- Fix missing error_data in task failure responses
- Hide CopilotKit web inspector button
- Remove hardcoded fallback suggestions from SmartTypingAssist
- Fix stale closure refs in SmartTypingAssist handleTypingChange
- Add two-column editor layout, stats bar, section hover menu
- Various subscription, billing, and research module improvements

.planning/PROJECT.md

@@ -1,46 +0,0 @@
-# ALwrity Project
-
-## What This Is
-ALwrity is an AI-powered content creation platform that helps users generate various types of content including podcasts, videos, blogs, and social media content. The platform features a React frontend and a FastAPI backend with onboarding workflows, API key management, and content generation capabilities.
-
-## Core Value
-To provide an all-in-one AI content creation suite that simplifies the content production process for creators, marketers, and businesses.
-
-## Current Focus
-Based on recent git commits, the team has been working on:
-- Podcast production features (voice cloning, avatar generation, B-roll integration)
-- Onboarding flow improvements
-- Backend stability and debugging
-- Frontend UI/UX enhancements
-
-## Requirements
-
-### Validated
-- User authentication (Clerk)
-- API key management for AI providers
-- Basic podcast generation workflow
-- File storage and media handling
-
-### Active
-- Podcast script generation and editing
-- Voice cloning and avatar creation
-- B-roll scene rendering and integration
-- Onboarding flow completion tracking
-- API endpoint stability and debugging
-
-### Out of Scope
-- Mobile applications (currently web-only)
-- Enterprise team collaboration features
-- Advanced analytics dashboard
-
-## Key Decisions
-- Using FastAPI for backend performance
-- React with Material-UI for frontend consistency
-- Modular API design for extensibility
-- Database-first approach for persistence
-
-## Constraints
-- Must maintain backward compatibility with existing API
-- Deployment targets include both development and production environments
-- Must support multiple AI providers (OpenAI, HuggingFace, etc.)
-- Budget-conscious resource usage for AI API calls