Add Search Engine Switcher with Keyboard Shortcuts

[Ishratnoori]

Feature: Search Engine Switcher with Keyboard Shortcuts

What this PR adds:

• Multiple Search Engines: DuckDuckGo, Google, ChatGPT, Gemini, Perplexity
• Keyboard Shortcuts:
  • Alt + D - DuckDuckGo (default)
  • Alt + G - Google
  • Alt + C - ChatGPT
  • Alt + M - Gemini
  • Alt + P - Perplexity
• Visual Feedback: Search bar placeholder updates to show current engine

How it works:

1. Type your query in the search bar
2. Press Alt + [respective letter] to switch search engines
3. Press Enter to search with the selected engine

Benefits:

• Quick switching between different search engines
• No need to manually navigate to different sites
• Maintains the aesthetic design of the startpage
• Easy to use with keyboard shortcuts

Files to be modified:

• index.html - Main functionality

This enhancement makes the startpage much more versatile for different types of searches!

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[Ishratnoori]

Notes / Limitations

• Google and Perplexity: support q= and open directly with the query.
• ChatGPT and Gemini: may ignore q= unless you’re logged in and their UI accepts prefilled input. We still open the site so you can continue the conversation there.

Testing

• Alt+D → DuckDuckGo + Enter opens results
• Alt+G → Google + Enter opens results
• Alt+P → Perplexity + Enter opens results
• Alt+C → ChatGPT opens app (query may not auto-fill)
• Alt+M → Gemini opens app (query may not auto-fill)

[Copilot]

Pull Request Overview

This PR adds a search engine switcher feature with keyboard shortcuts to the existing startpage. Users can now switch between different search engines (DuckDuckGo, Google, ChatGPT, Gemini, Perplexity) using Alt key combinations and their searches will be routed to the selected engine.

• Replaced hardcoded DuckDuckGo search URL with configurable search engine system
• Added keyboard shortcuts (Alt + D/G/C/M/P) for quick search engine switching
• Implemented localStorage persistence for selected search engine preference

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[Copilot]

The ChatGPT and Gemini URLs appear to use incorrect query parameter formats. ChatGPT doesn't support direct search queries via URL parameters, and Gemini's URL structure may not handle the '?q=' parameter as expected for search functionality.

Suggested change

	chatgpt: { name: "ChatGPT", url: "https://chat.openai.com/?q=" },
	gemini: { name: "Gemini", url: "https://gemini.google.com/app?q=" },
	chatgpt: { name: "ChatGPT", url: "https://chat.openai.com/" },
	gemini: { name: "Gemini", url: "https://gemini.google.com/app" },

[Copilot]

Empty line with trailing whitespace should be removed to maintain clean code formatting.

Suggested change