Landing page done with some other bug fixes

[Nathnael45]

Summary

Landing page redesign + small settings/profile cleanups

Landing page (/landing)

• Full rewrite to match the design mock — Odyssey Fund branding, hero, clients pill, dashboard preview tabs, testimonial, Grow Your
  Endowments, A Team Effort, We Prioritize, Who Are We, footer.
• Hero now shows /front.png workspace screenshot next to the headline.
• Tabbed dashboard preview wired up to four screenshots: dashboard.png, activity.png, contributors.png, funds.png (all in public/). Top of
  each is cropped 8px and gets a soft drop shadow.
• Tab pills are centered; only the active tab gets a border (others are borderless to prevent layout shift).
• "Sign Up" / "Get Started for Free" CTAs route to /auth/signup; "Log In" routes to /login.
• "Who are we" pulled into a contained rounded cream-colored card instead of a full-width gray band.
• "Grow Your Endowments" and "A Team Effort" sections now center-aligned.
• Testimonial copy fixed grammatically: "Managing my endowments has never been more fun."
• Removed the screenshot placeholders from Grow Your Endowments and from the Analytics/Collaboration cards.

Routing

• Root / now redirects to /landing instead of /login.

Settings (/settings)

• Removed the Fund Settings / Account Settings tab toggle — page now shows account settings directly.
• Removed Phone Number field (and dropped phoneNumber from formData).

Profile (/profile)

• Removed Date of Birth and Phone Number fields from Personal Information.

Assets added (frontend/public/)

• front.png, dashboard.png, activity.png, contributors.png, funds.png