feat: Tier B operator scaffolding — bundle, copy SoT, posts, emails

Pick up and finish yesterday's cut-off Tier B pass.

- build/: PyInstaller scaffold (datatools.spec + launcher.py +
  hook-streamlit.py + README) — folder-mode bundle, locked
  127.0.0.1, per-OS recipe
- marketing/COPY.md: single source of truth for every customer-facing
  string — landing H1/sub/CTAs, demo CTAs, email subjects, Gumroad
  listing, banned phrases
- marketing/community-posts/: 9 drafts (3 posts × 3 niches:
  bookkeeper, revops, shopify-pet) — story / tip / soft-offer
- marketing/emails/: 18 drafts (Gumroad delivery + 5-touch
  onboarding × 3 niches), per-niche segmentation guidance
- docs/NEXT-STEPS.md: flip 2.2 / 2.4 / 3.1 / 3.4 to done with
  pointers to the new assets; add Phase 0 inventory rows
- .gitignore: narrow `build/` ignore so PyInstaller spec + launcher
  + hooks get tracked, only generated artifacts (build/build/,
  build/__pycache__/, build/dist/) stay ignored

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

marketing/community-posts/README.md

@@ -0,0 +1,32 @@
+# Community posts
+
+Three drafts per niche, each value-first, ready to personalize:
+
+1. **`01-story.md`** — "Here's how I solved X." Concrete, narrative, no
+   pitch in the body. The product gets one mention at the end, in
+   context. Goes in subreddits / Slacks / forums where direct
+   promotion is banned. Lead with usefulness; the link is dessert.
+
+2. **`02-tip.md`** — A standalone tactical tip the reader can use
+   *without* DataTools. The product appears as "if you don't want to
+   do this by hand…" — earned, not pushed. Cross-post-safe.
+
+3. **`03-soft-offer.md`** — The one post where the product is the
+   subject. Goes in `/r/<niche>` "what are you working on" threads,
+   IndieHackers launches, and niche newsletters that allow paid-tool
+   posts. Still leads with the problem, not the features.
+
+## Personalization checklist before posting
+
+- [ ] Replace `{{your-name}}` and `{{your-context}}` in the opener
+- [ ] Match the community's tone (Reddit ≠ LinkedIn ≠ niche Slack)
+- [ ] Add a community-specific opener line ("Long-time lurker, first post" / "Saw the thread about X yesterday — figured I'd share")
+- [ ] Confirm the community's promo rules; if no-promo, drop the link from `01` / `02` and only mention "I built a thing, DM me if curious"
+- [ ] Vary the URL (use the niche-specific landing page, not the generic Gumroad URL)
+
+## Cadence guidance
+
+- Don't post all 3 drafts in the same community in the same week. Stagger:
+  Week 1 → `01-story`. Week 4 → `02-tip`. Week 8 → `03-soft-offer`.
+- Reply to commenters within 24h. The post itself sells less than the
+  comment thread that follows.