Mobile zoom-lock + top-bar icon fixes (v0.1.0:97)

First round of Grant's real-phone feedback on the mobile redesign. CSS-only;
desktop untouched.

- Viewport: add maximum-scale=1.0 + user-scalable=no. Disables pinch-zoom and —
  the real fix — the iOS auto-zoom-on-focus that jerked the whole page in on every
  tap of a sub-16px input (our fields are 13-15px). The mobile surfaces are sized
  for phones, so nothing needs zooming; OS-level accessibility zoom still works.
- Top-bar account initial: was rendering off-center because .account-btn lacked
  flex centering (it fell back to inline/baseline). Add inline-flex centering and
  align to the dc spec (IBM Plex Mono, accent-light, 13px, GridApp.dc:60).
- Quick-log pencil: bump --text-muted -> --text-secondary. Markup/color otherwise
  match the dc reference exactly, but the dc's thin grey outline reads as empty
  next to the color sun emoji on-device; the brighter neutral gives the action
  button real affordance.

Also records the v97 deploy + these items in AGENTS.md Current state.

start9/0.4/startos/versions/v0.1.0.97.ts

@@ -0,0 +1,21 @@
+import { VersionInfo } from '@start9labs/start-sdk'
+
+// Mobile top-bar polish + native zoom behaviour (CSS-only; no JS/schema change).
+// - Viewport meta gains maximum-scale=1 + user-scalable=no: disables pinch-zoom and, more
+//   importantly, the iOS auto-zoom-on-focus that jerked the page in whenever a sub-16px input
+//   was tapped (app-wide — our fields are 13–15px). OS-level accessibility zoom still works.
+// - Top-bar account initial is now flex-centered and dc-aligned (IBM Plex Mono, accent-light,
+//   13px); it was defaulting to inline/baseline and rendered off-center.
+// - Quick-log pencil colour bumped --text-muted -> --text-secondary so the action button reads
+//   clearly on-device (the dc t3 thin-outline grey read as empty next to the colour sun emoji).
+export const v_0_1_0_97 = VersionInfo.of({
+  version: '0.1.0:97',
+  releaseNotes: {
+    en_US: [
+      'Mobile polish: the app no longer zooms in when you tap a field or pinch (it now behaves',
+      'like a native app), and the top-bar account initial and quick-log pencil icon render',
+      'correctly. Desktop is unchanged.',
+    ].join(' '),
+  },
+  migrations: { up: async () => {}, down: async () => {} },
+})