Create home page with orange and white theme before gallery access

[Copilot]

This PR implements a new home page as the main landing page before users access the photo gallery, addressing the request for a better user flow and visual design.

Changes Made

🏠 New Home Page

• Created a modern landing page at / with hero section, features showcase, and clear navigation
• Implemented orange and white color scheme as requested (#f97316, #fed7aa, #ea580c)
• Added call-to-action buttons linking to the gallery
• Responsive design that works across all devices

🖼️ Gallery Page Restructure

• Moved existing photo gallery functionality from Index to dedicated Gallery page (/Gallery)
• Preserved all original upload and image display features
• Added proper error handling for missing API configuration
• Maintained consistent styling with the new theme

🎨 Design System

• Created custom CSS inspired by TailwindCSS utilities instead of relying on external CDN
• Replaced Bootstrap dark theme with clean orange and white design
• Implemented responsive grid layouts and modern UI components
• Added consistent navigation header across all pages

🔧 Technical Improvements

• Updated routing: / now serves Home page, /Gallery serves gallery functionality
• Added .gitignore to prevent build artifacts from being committed
• Enhanced error handling for development scenarios
• Maintained backward compatibility with existing API integration

Screenshots

Home Page

Gallery Page

The application now provides a proper welcome experience with clear branding and navigation before users access the gallery functionality, exactly as requested in the issue.

Fixes #10.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[Copilot]

@teerasej 👋 This repository doesn't have Copilot instructions. With Copilot instructions, I can understand the repository better, work faster and produce higher quality PRs.

I can generate a .github/copilot-instructions.md file for you automatically. Click here to open a pre-filled issue and assign it to me. I'll write the instructions, and then tag you for review.

[Copilot]

Pull Request Overview

This PR implements a new home page as the main landing page with an orange and white theme before users access the photo gallery, improving user flow and visual design.

• Creates a modern home page at / with hero section, features showcase, and navigation
• Moves existing gallery functionality to /Gallery while preserving all features
• Introduces custom CSS with orange and white color scheme (#f97316, #fed7aa, #ea580c)

Reviewed Changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
wwwroot/css/site.css	New comprehensive CSS file with orange/white theme and responsive utilities
Pages/Index.cshtml.cs	Simplified to redirect to new home page
Pages/Index.cshtml	Updated to redirect to home page at root
Pages/Home.cshtml.cs	New page model for home page
Pages/Home.cshtml	New home page with hero section and features
Pages/Gallery.cshtml.cs	Moved gallery logic from Index with added error handling
Pages/Gallery.cshtml	New gallery page with consistent orange/white theme

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}