fix: resolve Typing Speed Tester uninitialized input and hidden buttons

[Mudita-Singh]

📝 Description

This PR successfully resolves GitHub Issue #525: "Typing Speed Tester does not accept user input after starting the test".

Key Fixes:

1. Resolved Eager ReferenceError Crashes on Page Load (web-app/js/projects.js):

   • Refactored the core initializeProject(projectName) registry function to map keys to initializer function name strings (e.g. 'typing-speed-tester': 'initTypingSpeedTester').
   • Resolved functions dynamically off the global window object (window[initializerName]()) only if they are loaded. This completely prevents browser-level ReferenceError crashes on pages that only load a subset of scripts (like utilities.html, games.html, math.html).
   • Cleaned up the file by deleting a redundant duplicate initializeProject declaration at the top.

2. Fixed Button Visibility Collision (web-app/js/projects/typing-speed-tester.js):

   • The "Start Test 🚀" and "New Sentence" buttons inside the Typing Speed Tester template were previously set to class="btn-play".
   • In css/styles.css, .btn-play has a global style of display: none; (used to hide play overlay icons on cards). This caused the buttons inside the tester modal to be completely invisible, preventing users from ever starting the test.
   • Renamed the button classes to class="btn-tester-action", allowing them to render visibly.

3. Loaded Missing Script Files (web-app/utilities.html):

   • Added explicit loads for the showcased projects: number-converter.js and typing-speed-tester.js right before projects.js.

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Screenshots

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🔗 Linked Issue

Closes #525

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📋 Contribution Checklist

• My code strictly adheres to the project guidelines (Standard library only, procedural code, clean spacing).
• I have verified that my files are placed in the correct directory.
• I have tested my changes thoroughly on my local machine.
• I have included interactive emojis and clean console/UI outputs.
• GSSoC 2026: I have been formally assigned to this issue and noted it above.

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[github-actions]

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