copy + nav: refresh homepage hero, m2/dogfooding blurbs, drop m2 tab (#137, #138)

[sacha-l]

Summary

Bundled draft PR closing #137 (copy fixes) and #138 (drop M2 from primary nav). Diff is 4 changed lines across 3 files — no behaviour change beyond strings + one nav entry.

• Hero `

  ` on `/` → "Stuff people have built here."

• M2 Incubator description (mock fixture) → "Projects who've continued hacking in our mentorship and milestone-focused incubation programs."
• Generic Dogfooding description (mock fixture) → appends "Apply on an ongoing basis to get what you're building featured at our upcoming events."
• M2 tab removed from the primary nav strip. `/m2-program` route is preserved; users reach it via the existing PROGRAMS tab.

Closes #137. Closes #138.

Files changed

• `client/src/pages/HomePage.tsx` — hero text on `/` (line 268).
• `client/src/lib/mockPrograms.ts` — M2 Incubator description (line 89), generic Dogfooding description (line 107).
• `client/src/components/Navigation.tsx` — removed M2 entry from `TABS`.

Where the changes are visible

• Hero copy: `/`
• M2 + Dogfooding copy: `/programs` — the homepage filters program cards to `programType === 'hackathon'` (HomePage.tsx:81–82), so M2 / Dogfooding surface on the `/programs` index, not on `/`.
• Nav: every page.

Manual rollout follow-up (not in this PR)

The mock-fixture changes ship visibly on the Vercel preview (mock mode). Production reads M2 and the generic Dogfooding row from Supabase, so the descriptions need to be updated manually via the Supabase dashboard:

• `programs` row `slug = 'm2-incubator'` → update `description`.
• `programs` row `slug = 'dogfooding'` (generic ongoing, NOT `dogfooding-2026-berlin`) → update `description`.

The Berlin 2026 dogfooding row and `server/scripts/seed-dogfooding-program.js` are intentionally untouched.

Test plan

• `npm test` in `server/` — 248 passed (31 files).
• `npm run build` in `client/` — green; only pre-existing chunk-size warning.
• `npm run lint` in `client/` — clean (`--max-warnings 0`).
• `stadium-tester` against `http://localhost:8080\` with `VITE_USE_MOCK_DATA=true` — 5/5 PASS, 0 console errors.
• Visual review on the Vercel preview by reviewer.
• Manual Supabase prod row updates after merge (above).

stadium-tester report

```

Stadium UI verification — http://localhost:8080

Scenarios: 5 total, 5 pass, 0 fail, 0 skipped

#	Scenario	Result	Notes
1	On /, hero reads exactly "Stuff people have built here."	PASS	observed verbatim in hero
2	On /programs, M2 Incubator card description reads new mentorship/milestone copy	PASS	route corrected from / → /programs; HomePage only renders 'hackathon' cards
3	On /programs, generic Dogfooding card description ends with ongoing-application CTA	PASS	route corrected from / → /programs for the same reason
4	On /, top nav contains HOME / PROGRAMS / ADMIN, no M2	PASS	M2 tab absent from [role=tablist]; required tabs present
5	On /m2-program, the page loads (route preserved)	PASS	nav renders, no 404 string

Preview mode: window.STADIUM_MOCK = true (dev server started with VITE_USE_MOCK_DATA=true)
Console errors during run: 0
Recommended next action: continue to PR
```

Invariants respected

• No `console.*` added.
• No light-mode styles or hex-with-`!important` introduced.
• No Mongoose access in `server/api/**`; no Supabase access in `server/scripts/`.
• ESM untouched. No new files.
• `BYPASS_ADMIN_CHECK` untouched.

Notes

• Per CLAUDE.md §6: opening as draft, never merging. CODEOWNER reviews + merges.

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Project	Deployment	Actions	Updated (UTC)
stadium	Ready	Preview, Comment	May 21, 2026 9:13pm