docs(welcome): entry button is 'Launch Simulator' (new welcome.launch key)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/superpowers/specs/2026-06-30-welcome-screen-design.md

@@ -9,8 +9,8 @@
 Replace the current bare boot flow with a single **Welcome screen**: the
 universal entry gate the visitor sees on every load. It carries the
 photosensitivity "Heads up" notice, the four output controls (Video, Reduce
-motion, Audio, Language) with welcome-appropriate defaults, a **Continue**
-button, and the "Loading Universe" progress. The right control panel is hidden
+motion, Audio, Language) with welcome-appropriate defaults, a **Launch
+Simulator** button, and the "Loading Universe" progress. The right control panel is hidden
 until the visitor enters the simulation.
 
 ## Why
@@ -55,20 +55,21 @@ The overlay contains three blocks:
    control rather than "the panel"). Structured so additional welcome copy can be
    added later (see Forward notes).
 2. **Controls** — the four output controls (below).
-3. **Loading** — the "Loading Universe" title + progress bar.
+3. **Launch Simulator** — the single entry button.
+4. **Loading** — the "Loading Universe" title + progress bar.
 
 ### 2. Two visual states
 
-**State A — Welcome (on load):** welcome messaging + controls + Continue button
-shown; the Loading block sits at the **bottom**, its bar filling as phase-1
-preload runs in the background.
+**State A — Welcome (on load):** welcome messaging + controls + "Launch
+Simulator" button shown; the Loading block sits at the **bottom**, its bar
+filling as phase-1 preload runs in the background.
 
-**State B — Loading (after Continue, only if not yet loaded):** the welcome
-messaging and Continue button **disappear**; the **controls remain**; the Loading
+**State B — Loading (after Launch, only if not yet loaded):** the welcome
+messaging and Launch button **disappear**; the **controls remain**; the Loading
 block moves to **center**. When phase-1 preload completes, auto-enter the
 simulation.
 
-**Continue when already loaded** → skip State B; enter the simulation directly.
+**Launch when already loaded** → skip State B; enter the simulation directly.
 
 State is driven by a class on `#welcome` (e.g. `.welcoming` → `.loading`), with
 the "loaded yet?" decision made from a flag set when phase-1 preload resolves.
@@ -88,8 +89,8 @@ default.
 
 ### 4. Entry into the simulation
 
-Continue is the user gesture that unlocks audio (the role `#run-sim` had). On
-Continue → enter (either immediately when loaded, or at end of State B):
+"Launch Simulator" is the user gesture that unlocks audio (the role `#run-sim`
+had). On Launch → enter (either immediately when loaded, or at end of State B):
 
 1. Copy the four welcome values into the existing panel inputs (`#visual`,
    `#reduce-motion`, `#audio`, `#lang-select`).
@@ -108,7 +109,7 @@ are not a parallel system:
 
 - **Language** routes through the global `setLanguage()`, which sets `activeLang`
   and runs `applyUiStrings()` over **all** `[data-i18n]` elements — so the
-  heads-up copy, control labels, and Continue button re-render live, exactly like
+  heads-up copy, control labels, and Launch button re-render live, exactly like
   the panel selector does today. The panel `#lang-select` value is synced to
   `activeLang` on entry.
 - **Reduce motion** sets the same `reduceMotion` variable + `RM_KEY` localStorage
@@ -123,15 +124,15 @@ are not a parallel system:
   **retired**.
 - Entry uses the **chosen** Audio level rather than always snapping to 2 (2 is the
   default, not a forced value).
-- `#run-sim` is removed; **Continue** is the single entry button.
+- `#run-sim` is removed; **"Launch Simulator"** is the single entry button.
 
 ## i18n
 
 New / changed `UI_STRINGS` keys in `simulator/static/i18n.js` (all four langs —
 en/es/fr/ja, matching existing parity):
 
-- A Continue button label (reuse `warn.continue` if suitable, or add
-  `welcome.continue`).
+- A new `welcome.launch` key — **"Launch Simulator"** (the single entry button),
+  translated in all four languages.
 - Reworded `warn.body` (point at the on-screen Reduce-motion control).
 - Welcome-screen control labels reuse the existing `output.video`,
   `output.audio`, `rm.label` keys (already translated). The language selector
@@ -156,10 +157,11 @@ tests. Plan to:
   `#motion-warning` to the new `#welcome` flow.
 - **Add** coverage for:
   - Welcome defaults (Video on, Reduce motion off, Audio 2, English).
-  - Language switch re-renders welcome text (heads-up + labels + Continue) live.
-  - Continue **while loading** → State B (messaging gone, controls remain,
+  - Language switch re-renders welcome text (heads-up + labels + Launch button)
+    live.
+  - Launch **while loading** → State B (messaging gone, controls remain,
     progress centered), then auto-enter when loaded.
-  - Continue **when already loaded** → straight into the simulation.
+  - Launch **when already loaded** → straight into the simulation.
   - `.panel` hidden during welcome + loading; revealed on entry.
   - Welcome control values carry into the panel inputs on entry.