Add onboarding flows for new users

[InfinityBowman]

Summary

New users complete the profile wizard and land on an empty dashboard with no guidance. Free users immediately hit a dead end when they can't create projects, and the app's strongest free feature (local appraisals) is underemphasized. There's no clear mental model for the local-vs-project distinction.

Changes

1. Welcome card with quick actions (first-time users)

• Show a contextual welcome card on first login instead of the generic greeting
• Surface the unused QuickActions component with start buttons for each checklist type
• Include a dismissible explainer on local appraisals vs projects
• Returning users continue to see the standard "Welcome back" header

2. Fix ContactPrompt for free users

• Replace the "Early Access Testing" dead end with actionable content
• Link to /pricing instead of /contact
• Mention the 14-day trial option
• Reframe the free tier positively

3. Improve landing page hero CTAs

• Differentiate "Start an Appraisal" (primary, zero-friction) from "Start a Review Project" (secondary, requires account)
• Make the distinction between the two paths visible to new visitors

4. Add free tier to pricing page

• Show what free users get (unlimited local appraisals, all checklist types, CSV/PDF export)
• Set expectations before signup to reduce frustration

5. Empty-state enhancements on dashboard

• Improve local appraisals empty state with checklist type cards
• Add brief value props to empty states

6. Fix sign-in tab default

• Default to "Email Link" tab to match the passwordless signup flow

[coderabbitai]

🔗 Related PRs

#142 - fix incorrect state after sign in and reduce errors [merged]

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