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/emails/shopify-pet/00-delivery.md

@@ -0,0 +1,34 @@
+# Shopify-pet · Day 0 — Delivery email
+
+**Subject:** Your DataTools download (start here)
+**Send:** immediately on Gumroad purchase confirmation
+**Goal:** download + first run within 24h
+
+---
+
+Hi {{first_name}},
+
+Thanks for buying DataTools. Your download:
+
+→ **{{download_url}}**
+
+Three things to do in the next 5 minutes:
+
+**1. Download the installer for your OS** (Mac `.dmg`, Windows `.exe`, or Linux `.tar.gz`). About 280 MB. The link auto-detects.
+
+**2. Run it.** First launch takes ~5 seconds; a browser tab opens to `127.0.0.1:8501`. That's the app — running locally on your machine. No data leaves the box. Your customer list never goes to a server.
+
+**3. Drop in a real Shopify customer export.** Don't bother with the bundled samples. Customers > Export > "All customers" > CSV in Shopify admin. Drag it into DataTools' analyzer, click **"Run all"**. You'll see what it catches — typically a few hundred phone-format issues, some hidden-character emails, and a handful of cross-row duplicates — in about 30 seconds.
+
+If something doesn't work: reply to this email. Goes to my inbox.
+
+Refund: also reply. 30-day no-questions; no form.
+
+Tomorrow I'll send a sample Shopify customer export with the tricky cases pre-built in, so you can see what the cleanup catches on a known input. After that you'll get one email a week for the next month with one tip each. Unsubscribe at the bottom of any of them.
+
+Welcome aboard.
+
+— Michael
+{{support_email}}
+
+P.S. Got a fellow store owner who'd find this useful? {{landing_page}}.