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>

.claude/memory/code-mode-ui.md

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+# Code Mode UI — Future Work
+
+## After content surfacing is complete, implement:
+
+### 1. Code Mode Visual Treatment
+- Colour the message container in orange (`#F7931A`) styling when in code mode
+- Change header text from "Message AIUI" to "Code"
+- Visual signal so user knows they're in coding context
+
+### 2. Design System Context Selection
+- All design system items should be selectable with a cursor/pointer icon on hover
+- Selecting a design system item provides that UI context to the code generation
+- Think of it as "code with this component/token in mind"
+
+### 3. File Browser / Open File Context
+- File browser or open file in the content panel
+- Selected files provide context for coding
+- Pairs with the design system selection — user picks UI + files as coding context