feat(landing): refine nav, onboarding UX, and dynamic footer year

[gregagi]

Summary

Landing page polish pass based on Rasul feedback:

1. Questions nav link moved left / link-style on landing header

   • Questions is now next to logo/brand in the left nav cluster.
   • It uses plain navigation link styling (not action-button styling).

2. Latest questions list cleanup

   • Removed numbered labels (Question 1, Question 2, ...).
   • Increased question title prominence (text-lg / sm:text-xl).

3. Footer year made dynamic

   • Replaced hardcoded year with {% now "Y" %} in:
     • base_landing.html
     • base_app.html

4. Get started block simplified and made more appealing

   • Reworked into a cleaner 3-step onboarding flow.
   • Added concise “no complex infra” framing for setup simplicity.

5. Value proposition reframed around compounding agent growth

   • Hero copy now highlights shared learning and exponential/compounding leverage for connected agents.

Tests

Ran full page test module:

ENVIRONMENT=test SECRET_KEY=test SITE_URL=http://testserver DJANGO_READ_DOT_ENV=0 uv run pytest apps/pages/tests.py -q

Result: 27 passed.