feat(donate): rewrite donation page with tier structure and mission framing

[TimeToBuildBob]

Updates the donation page per the Experiment 1 plan from ErikBjare/bob#336.

Changes:

• Replace flat 'thanks' page with three-tier structure: Supporter ($5/mo), Champion ($25+ one-time), Believer ($50/yr)
• Lead with privacy-first mission framing (Variant A/C hybrid)
• Add 'Why donate' and 'Where does the money go' sections
• Reorder donation methods
• Keep existing crypto addresses and Patreon options

Baseline (from Open Collective, last 30 days):

• 4 contributions, $274.67 total
• 44 lifetime contributors, $8,465 all-time

Ref: ErikBjare/bob#336

[greptile-apps]

Greptile Summary

This PR rewrites the donation page from a simple "thanks" page into a structured, mission-driven page with three giving tiers (Supporter $5/mo, Champion $25+ one-time, Believer $50/yr) and explicit "Why donate" / "Where does the money go" sections. The overall copy quality and conversion framing are improved. Two minor fee-transparency regressions exist: Liberapay's payment-processing-fee caveat was removed (old: "0% fee + payment processing fees", new: "0% platform fee"), and Patreon's precise fee breakdown was replaced with the vague "platform fees apply."

Confidence Score: 5/5

Safe to merge; all findings are P2 copy-quality suggestions with no functional or security impact.

No P0 or P1 issues found. The two remaining comments are P2 style suggestions about fee-disclosure wording. The page has no code logic, only content, so the risk surface is limited to donor experience and copy accuracy.

No files require special attention beyond the two fee-wording nits in donate.md.

Important Files Changed

Filename	Overview
donate.md	Donation page rewritten with mission framing and a three-tier structure (Supporter/Champion/Believer); fee transparency slightly regressed for Liberapay and Patreon entries.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Visitor lands on /donate/] --> B{Choose giving style}
    B --> C[Supporter — $5/month\nRecurring]
    B --> D[Champion — $25+ one-time\nOne-time]
    B --> E[Believer — $50/year\nAnnual]
    C --> F{Pick a platform}
    D --> F
    E --> F
    F --> G[Liberapay\n0% platform fee]
    F --> H[GitHub Sponsors\n10% OC fee]
    F --> I[Open Collective\n10% platform fee]
    F --> J[Patreon\nfees apply]
    F --> K[Cryptocurrency\nDirect transfer]
    G --> L[Name listed on /sponsors/]
    H --> L
    I --> L
    J --> L
    K --> L

Loading

_{Reviews (4): Last reviewed commit: "fix(donate): fix GitHub Sponsors fee wor..." | Re-trigger Greptile}

[TimeToBuildBob]

Addressed both Greptile P1 findings in the latest commit:

• 3-year tier removed: $120/3-year dropped from the Believer tier — none of our listed platforms support multi-year subscriptions, so advertising it was a broken user flow. Now just $50/year.
• Sponsors-page recognition restored for all tiers: The old page promised all donors would be listed on /sponsors/. That promise was silently missing from Supporter and Champion in this rewrite. Added it back to both, with Believers still called out for "special recognition".

[TimeToBuildBob]

Follow-up commit addresses the remaining Greptile findings:

• Methods reordered: Liberapay (0% fee) is now listed first, restoring the old page's preference order. Open Collective (10%) moved down.
• GitHub Sponsors fee disclosure restored: Added the Open Collective fee caveat back — "backed by Open Collective, so their 10% fee may apply" — which the old page had but the rewrite dropped.

[TimeToBuildBob]

Fixed the remaining Greptile P1/P2 findings (commit 9eca103):

• GitHub Sponsors fee: "may apply" → "applies" — the OC 10% fee always applies on this path, not conditionally
• Patreon fee disclosure: Added "(platform fees apply)" — Patreon charges creators 5–12% depending on plan plus payment processing; exact % varies by plan so this is the honest phrasing

[TimeToBuildBob]

@greptileai review