fix: convert datetime to str in admin users list to fix JSON serializable error

feat: implement permission control systems for users, bypass dashboard for guests, and fix modal select styling

feat: support direct 'admin' username login and seed it as administrator in SQL Server

feat: implement administrative CRUD accounts management panel with role-based access check

feat: implement database-backed user login system with default admin seeding

feat: migrate batch generator backend to SQL Server with auto-provisioned tables

feat: complete AI Batch Video & Image Generator tool integration with Replicate API

feat: implement 4 new AI creator tools for youtube and tiktok with interactive mockups and planners

feat: complete backend controllers, dynamic Select2 templates, and sidebar layouts for all 4 new AI tools

feat: integrate VieNeu-TTS preset voices into AI Audio Story Studio and implement auto-routing synthesizer

fix: harden JSON parsing and escape instructions to prevent JSONDecodeError in Step 2

feat: add auto-fallback for Gemini quota in audio story studio

feat: redesign Audio Story Studio with 3-step workflow (prompt > script > audio)

feat: add AI Audio Story Studio tool for prompt-based audiobook synthesis

feat: add Truyen Audio prompt category with high-view clickbait genres

feat: add AI Prompt Studio tool with 11 prompt categories and clean dropdown selector

Localization: Translate language names to Vietnamese in Edge TTS and Google TTS

Fix: add missing route decorators (tts-voices), add gtts and edge-tts deps

Fix: add missing @app .route('/translate') decorator

Fix: install deps at runtime via start.sh, keep original app logic

Fix: remove rembg (too heavy), lazy import, simplify deps

Initial commit: PUM'S TOOLKIT - AI-powered tools collection