Improve dashboard page mobile responsiveness and table display

[samankwah]

No description provided.

[samankwah]

Hi @Grace-Amondi

Thank you for the review. Here's a detailed changelog for this PR

1. Mobile table horizontal scroll >>> Tables now scroll horizontally on mobile with sticky first column for better UX
2. Table scroll wrapper >>> Dynamically wraps tables in scrollable container with touch support
3. Sticky column via JavaScript >>> More reliable cross browser sticky positioning than CSS-only approach
4. Navbar logo spacing >>> Added professional padding to prevent logo from touching screen edge on mobile view
5. Navigation tabs centering >>> Centered navigation tags/buttons on all screen sizes
6. Footer button responsiveness >>> Fixed button text overflow on mobile devices
7. Emission scenario headers >>> Updated date ranges for Low/Medium/High emission scenarios
8. Season → Category rename >>> Changes table header "Season" to "Category"
9. Indicator row merging >>> Merges Temperature/Rainfall/Sea Level rows with rowspan

Suggestion
I can split this PR, submit only the general fixes to main repo and maintain Ghana-specific changes in our fork. Let me know your preference.