🚫 Missing Form Validation in Event Creation Page

### 🐞 Description:
The event creation form currently allows submission without filling required fields like title, location, or time slots. This leads to incomplete or invalid data being saved.

### 🔍 Steps to Reproduce:
1. Go to "Create Event" page
2. Leave some or all fields empty
3. Click Submit

### ✅ Expected Behavior:
- Form should show an error or prevent submission if required fields are empty.
- Add HTML5 `required` attribute or JS-based validation.

### 💡 Suggested Fix:
- Add `required` attribute in HTML inputs
- Optionally implement frontend JavaScript validation
- Add server-side check in Tornado backend

### 📦 Tech Stack:
- HTML/CSS (form inputs)
- JavaScript (optional)
- Python (Tornado server)

### 🏷️ Labels:
`bug`, `validation`, `frontend`, `good first issue`

### 🙋‍♀️ I'd Like to Work on This:
Hi! I’m a GSSoC ‘25 contributor. I’d love to work on this issue. Please assign it to me!