fix: repair broken form submit handler and restore Clear Filters function

[ckprojects77]

Summary

The Clear Filters button on the Find Project page was completely non-functional. The root cause was a duplicate nested fetch block inside the form submit handler in script.js that caused a JavaScript syntax error, crashing the entire script before any event listeners could register including the Clear Filters click handler. Fixed by removing the duplicate broken fetch block and replacing the entire submit handler with a single clean version.

Related Issue

Closes #409

Type of Change

• Bug fix — resolves a broken behaviour

What Was Changed

| static/script.js | Removed duplicate nested fetch block inside catch handler that was causing a syntax error and preventing all event listeners from registering.

How to Test This PR

1. Clone this branch: git checkout fix/clear-filters-button
2. Install dependencies: pip install -r requirements.txt
3. Run the app: python app.py
4. Open http://127.0.0.1:5000
5. Fill in Experience Level, Area of Interest, Time Availability
6. Click Clear Filters
7. All fields should reset to empty default state

Test Results

Frontend only fix no backend tests affected.

Screenshots

Before: Clicking Clear Filters did nothing
After: All fields reset correctly on click

Self-Review Checklist

• I have read CONTRIBUTING.md and followed all guidelines
• My branch name follows the convention: fix/clear-filters-button
• I have not introduced any console.log() debug statements
• I have not modified files outside the scope of the linked issue
• If I changed the UI, I tested it at 375px and 1280px

Notes for Reviewer

This is a pure JavaScript fix in static/script.js. No Python backend files were modified. The duplicate fetch block was introduced by a previous contributor and was breaking the entire script execution.

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