EVENT-10 - Event grid search & filtering

[oorjagandhi]

Description

Add interactivity to the Past Events section built in #37. This includes a search input to filter events by name, and category filter tabs (All, Games, Food). Search and filtering should work in combination.

Depends on #37 being merged first.

Design

Figma

Acceptance Criteria

• A search input is displayed and matches the Figma design
• Typing in the search input filters the visible cards (confirm with design whether this is on keystroke or on submit)
• Search is case-insensitive
• If no results match, an empty state message is shown (e.g. "No events found")
• Clearing the search input restores the full list
• Category filter tabs are displayed: All, Games, Food
• Selecting each category displays only relevant cards
• Search and category filters work in combination (i.e. search is scoped to the selected category)
• Empty state is shown when the combined search + filter returns no results