Venture loop: launch products, not pages

Ported from the notplanned venture template:
- launch round: every board seat writes a launch plan (positioning, first
  users, pricing, channels, 7-day success and kill lines); one seat
  synthesizes them into LAUNCH.md with where each idea came from
- launch page brief: one primary call to action in the hero, the working
  product preloaded with a sample, why-this-exists with real star counts,
  pricing (free plus at most two honest early-access tiers), honest limits,
  a design direction that rotates and never repeats the last six
- signups through a GitHub issue form prefilled with venture and plan;
  each signup is thanked on its own issue
- checks: deterministic gates, then headless Chrome measuring at exactly
  390x844 and 1280x800 (horizontal scroll, button below the fold, JS
  errors); two fix rounds, then andon with needs-human and /time retry
- a contact-sheet screenshot of phone and desktop on the card
- 7-day decision on distinct people: v2 card, kill, or one more week then
  park; a next version counts only signups after its own launch
- scheduling: a card that is measuring never blocks the others; one new
  card a day; a tick runs light stages back to back and one worker run
- the studio index at /ventures/ is generated from ventures.json

Security: the worker's shell no longer sees tokens or keys, its checkout
keeps no token in .git/config, and workflows don't persist credentials.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UpT7eWzeLhRwuYmsSQnbRb

.github/ISSUE_TEMPLATE/early-access.yml

@@ -0,0 +1,29 @@
+name: Early access
+description: Join the early-access list for one of the studio's ventures. No email, nothing charged.
+title: "Early access: "
+labels: ["signup"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for raising your hand. This is a **public** GitHub issue: no email is collected and nothing is charged.
+        The studio replies here, and what you write below shapes the next version.
+  - type: input
+    id: venture
+    attributes:
+      label: Venture
+      description: Filled in from the page you came from.
+      placeholder: e.g. mdecks
+    validations:
+      required: true
+  - type: input
+    id: plan
+    attributes:
+      label: Plan
+      description: The tier you would want. Paid tiers are early-access ideas; nothing is charged.
+      placeholder: e.g. Free, or a founding tier
+  - type: textarea
+    id: use
+    attributes:
+      label: What would you use it for?
+      description: One or two sentences about your use. This decides what gets built next.