Namitha : Fix alignment of Search Filters and Events sections

[Namitha7070]

Description

Related PRS (if any):

Main changes explained:

1. Added 60px top margin to Dates section - Pushes the Dates and Online filter groups down to align with the first row of event cards on the right
2. Added 80px top margin to Branches section - Aligns Branches, Themes, and Categories filter groups with the second row of event cards, matching the Figma design
3. Eliminated excessive vertical spacing - Removed the uneven spacing that caused the Search Filters container to extend beyond its intended boundary
4. Achieved vertical alignment parity - Both the left sidebar (Search Filters) and right content area (Events grid) now maintain consistent vertical alignment throughout the page
5. Resolved UI/UX design discrepancy - The layout now matches the approved Figma specifications with proper visual balance and spacing proportions between sections

How to test:

1. check into current branch
2. do npm install and ... to run this PR locally
3. Clear site data/cache
4. log as admin user
5. go to dashboard→ /communityportal
6. verify alignment between the Branches/Themes/Categories group aligns with the second row of event cards, matching the Figma design

Screenshots or videos of changes:

Week.30.mp4

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud