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[MasumRab]

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Summary by Sourcery

Migrate backend from PostgreSQL to a JSON file–based DatabaseManager, remove obsolete performance monitoring and legacy routes, clean up unused dependencies and files, and revamp the client dashboard to focus on email listing and AI analysis.

New Features:

• Replace PostgreSQL backend with JSON file–based storage in DatabaseManager, including file loading/saving, ID generation, and default category seeding.
• Enable client‐side email selection with a new AIAnalysisPanel for detailed AI insights.

Enhancements:

• Remove performance monitoring instrumentation and legacy action/dashboard routes across server code.
• Simplify dashboard UI by stripping out batch analysis, stats cards, activity feeds, and category overview components, replacing them with generic placeholders.
• Clean up project dependencies by removing psycopg2-binary, pg, drizzle ORM, and related database scripts.
• Purge unused deployment, test, and miscellaneous support files to streamline the codebase.

Build:

• Simplify npm scripts by removing database setup commands and retaining only type checking.

Chores:

• Update imports to use centralized models and remove performance_monitor references in routes.
• Refactor database queries into JSON file operations and migrate route handlers accordingly.

[sourcery-ai]

Reviewer's Guide

This PR fully reimplements the backend data layer to use JSON file storage (replacing PostgreSQL and psycopg2), removes performance monitoring and obsolete schemas, cleans up dependencies, and refactors the client dashboard UI by stripping legacy widgets and introducing a streamlined two-column email list and AI analysis layout.

Class diagram for updated DatabaseManager (JSON storage)

classDiagram
    class DatabaseManager {
        - emails_file: str
        - categories_file: str
        - users_file: str
        - emails_data: List[Dict]
        - categories_data: List[Dict]
        - users_data: List[Dict]
        + __init__()
        + initialize()
        + _load_data()
        + _save_data(data_type)
        + _generate_id(data_list)
        + create_email(email_data)
        + get_email_by_id(email_id)
        + get_email_by_message_id(message_id)
        + get_all_emails(limit, offset)
        + get_emails(limit, offset, category_id, is_unread)
        + update_email_by_message_id(message_id, update_data)
        + update_email(email_id, update_data)
        + create_category(category_data)
        + get_all_categories()
        + _update_category_count(category_id)
        + create_user(user_data)
        + get_user_by_username(username)
        + get_user_by_id(user_id)
    }
    class JSONFileStorage {
        + emails.json
        + categories.json
        + users.json
    }
    DatabaseManager --> JSONFileStorage : reads/writes

Loading

File-Level Changes

Change	Details	Files
Migrate DatabaseManager from PostgreSQL to JSON file storage	Added DATA_DIR and JSON file paths; ensured directory creation Replaced init to load in-memory lists via _load_data and seed defaults Implemented _save_data, _generate_id, initialize seeding logic Rewrote all CRUD methods to operate on in-memory lists, filtering, sorting, and saving files Removed _execute_query, SQL queries, and psycopg2 imports	server/python_backend/database.py requirements.txt
Strip out performance monitoring and metrics setup	Commented out PerformanceMonitor imports and decorators across all route files Removed background_tasks.add_task calls for recording performance Removed metrics setup in main.py (setup_metrics) Unregistered action_routes and dashboard_routes routers	server/python_backend/email_routes.py server/python_backend/gmail_routes.py server/python_backend/filter_routes.py server/python_backend/category_routes.py server/python_backend/main.py
Simplify NLP filter schema by removing deprecated table	Deleted CREATE TABLE statement for google_scripts in smart_filters	server/python_nlp/smart_filters.py
Refactor dashboard.tsx to remove legacy widgets and streamline layout	Removed imports and code for AI control panel, batch analysis, stats-cards, recent-activity, and category-overview Commented out Bell icon button and related UI elements Introduced two-column layout: EmailList on left and AIAnalysisPanel on right Added placeholder cards for future Data Overview and Quick Links	client/src/pages/dashboard.tsx
Enhance EmailList component with selectable emails	Extended EmailListProps to accept onEmailSelect callback Updated handleEmailClick to invoke onEmailSelect instead of console.log	client/src/components/email-list.tsx
Clean up dependencies and scripts	Removed pg, psycopg2-binary, connect-pg-simple, drizzle-orm, drizzle-kit from package.json and requirements.txt Simplified npm scripts by dropping db:push, db:setup Deleted obsolete deployment and schema files	package.json requirements.txt

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