fix(app): iOS HIG Phase 1 — input font sizes and text minimums

- Replace all text-[10px] (308 instances) with text-xs (12px)
- Replace all text-[9px] and text-[8px] (133 instances) with text-xs
- Replace all text-[11px] (76 instances) with text-xs
- Bump all input/textarea font sizes to text-base (16px) to prevent iOS auto-zoom
- No visual design changes — only sizing minimums enforced

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/app/src/components/renderers/ArticleReader.vue

@@ -5,7 +5,7 @@
       v-if="headings.length > 1"
       class="hidden lg:flex flex-col w-56 shrink-0 border-r border-white/5 overflow-y-auto scrollbar-hide py-4 px-3"
     >
-      <p class="text-[10px] uppercase tracking-wider text-white/30 mb-2 px-2">Contents</p>
+      <p class="text-xs uppercase tracking-wider text-white/30 mb-2 px-2">Contents</p>
       <button
         v-for="(h, i) in headings"
         :key="i"
@@ -55,7 +55,7 @@
           :disabled="fontSizeIdx <= 0"
           @click="fontSizeIdx = Math.max(0, fontSizeIdx - 1)"
         >
-          <span class="text-[10px] font-bold">A-</span>
+          <span class="text-xs font-bold">A-</span>
         </button>
         <button
           class="w-8 h-8 flex items-center justify-center rounded-lg text-white/60 hover:text-white/80 hover:bg-white/10 transition-colors"