App versioning + the create page's missing top padding

Versioning: package.json carries the app version (0.1.2 here; one bump per
task with `npm run version:bump`, patch 0-9 rolling into the minor at 10),
baked into the build via lib/version.ts, reported by /api/healthz and shown
in Settings next to the running commit. AGENTS.md documents the rule; the
native suite checks both the API and the Settings row.

Fix: on desktop the app header is hidden, so every page owns its top padding —
/create was the only one without `lg:pt-10`, which slammed the Study deck /
Make my homework switch against the top of the window while /homework had a
comfortable gap. Both now sit at 40px; the wizard suite asserts the clearance
and that the two pages stay in step (90 checks).

SW -> freezmo-v50.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "freezmo",
-  "version": "0.1.0",
+  "version": "0.1.2",
   "private": true,
   "license": "GPL-3.0-only",
   "scripts": {
@@ -10,7 +10,8 @@
     "build": "next build",
     "start": "next start -H 0.0.0.0 -p 3207",
     "lint": "eslint",
-    "test:e2e": "node tests/run-all.mjs"
+    "test:e2e": "node tests/run-all.mjs",
+    "version:bump": "node scripts/bump-version.mjs"
   },
   "dependencies": {
     "canvas-confetti": "^1.9.4",