feat(first-run): render the mission launcher from a store

initFirstRunExperience no longer writes the launcher card's classes,
attributes and text, wires its listeners or removes it: it presents the
card's visibility, busy state, status line, copy and scroll fade to the
gev-first-run store and connects the controls the welcome view's choices,
DISMISS and "Don't show this again" call. A refused save hands the tick
back to the view to revert. The launcher still reads the rendered card for
its hit test, keyboard trap, focus and overflow measurement.

The owner-chosen copy moves to src/firstRunCopy.js, shared by both. The
source-text tests give way to component tests, and the first-run mutation
QA follows the new code (67/67 caught).

scripts/package-boundaries.json

@@ -117,7 +117,9 @@
       "src/ui/stores/awarenessDirection.js",
       "src/ui/views/panels/AwarenessDirection.vue",
       "src/ui/stores/hud.js",
-      "src/ui/views/IntelHudView.vue"
+      "src/ui/views/IntelHudView.vue",
+      "src/ui/stores/firstRun.js",
+      "src/firstRunCopy.js"
     ],
     "external": ["vue", "pinia"]
   },
@@ -3045,7 +3047,9 @@
       "src/ui/stores/worldOverlayActions.js",
       "src/ui/stores/awarenessDirection.js",
       "src/hudReadouts.js",
-      "src/ui/stores/hud.js"
+      "src/ui/stores/hud.js",
+      "src/ui/stores/firstRun.js",
+      "src/firstRunCopy.js"
     ],
     "external": [
       "hls.js",