impeccable project-wide (#27)

Reviewed-on: #27 Co-authored-by: vickydotbat <vickydotbat@tutamail.com> Co-committed-by: vickydotbat <vickydotbat@tutamail.com>
2026-07-16 22:12:56 +00:00
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+> **Additional context needed**: target platforms/devices and usage contexts.
+
+Adapt an existing **native** design (`ios` / `android` / `adaptive`) to a different context: another device class, orientation, platform, or origin. The trap is treating adaptation as scaling. The job is rethinking the experience for the new context, inside the platform conventions of [ios.md](ios.md) / [android.md](android.md); read the target platform's reference before planning if Setup hasn't already.
+
+## Assess Adaptation Challenge
+
+1. **Source context**: what was it designed for, and what assumptions did it make? (Phone-only? Portrait-only? One platform's idioms? A website?)
+2. **Target context**: which device class (phone, tablet, foldable), orientation, platform, and usage posture (one-handed on the go vs two-handed at rest)?
+3. **What breaks**: navigation that doesn't fit the target, layouts that stretch instead of restructure, gestures or controls that don't exist there?
+
+## Adaptation Strategies
+
+### Phone → Tablet (iPad / large screens)
+
+- **Restructure, don't stretch.** A scaled-up phone UI on a tablet is the failure mode. Use size classes (iOS) / window size classes (Android) to switch structure.
+- **Navigation changes shape**: tab bar stays or becomes a sidebar on iPad; Android navigation bar becomes a rail or drawer on expanded width.
+- **Use the width**: split view / master-detail (list + detail side by side), multi-column grids, popovers where phones used sheets.
+- **Multitasking is a size, not an edge case**: iPad Split View and Android multi-window can hand you a phone-width window on a tablet; size-class-driven layout handles both for free.
+
+### Orientation & foldables
+
+- Landscape restructures (side-by-side panes, repositioned controls); never clip or letterbox. Lock orientation only when the task truly demands it.
+- Foldables (Android): react to posture and hinge via window size classes; test folded, unfolded, and tabletop.
+
+### Platform → platform (iOS ↔ Android)
+
+Translate idioms; never transplant them:
+
+| iOS | Android |
+|---|---|
+| Tab bar | Navigation bar / rail / drawer |
+| Edge-swipe back, back chevron | Predictive Back gesture / button |
+| Switch, segmented control, system pickers | Material switch, chips, Material pickers |
+| Action sheet | Bottom sheet / Material dialog |
+| SF Symbols, SF Pro, Dynamic Type | Material Symbols, Roboto, sp scaling |
+| Semantic system colors, materials | Material color roles, tonal elevation |
+| System push/sheet transitions | Container transform, shared-axis, fade-through |
+
+Rebuild navigation and controls in the target's vocabulary; carry over the brand's expressive layer (palette intent, type accent, motion personality) through the target's theming system.
+
+### Web → native (porting a website or web app)
+
+Reconform, don't reflow. Replace web navigation with the platform's model, HTML-shaped controls with platform controls, hover affordances with touch-first ones, and px-based type with Dynamic Type / sp. Then treat the result to the full platform reference; the slop test there is the acceptance bar.
+
+## Implement & Verify
+
+- Drive structure from **size classes / window size classes**, never from device-model checks.
+- Respect safe areas and window insets in every new configuration (notch, hinge, status bar, keyboard).
+- Test on simulators for breadth, then real hardware for truth: at least one phone and one tablet per shipped platform, both orientations, split-screen where supported.
+
+When the adaptation feels native to each context, hand off to `$impeccable polish` for the final pass.
+
+**NEVER**:
+- Ship a stretched phone layout on a tablet
+- Port one platform's controls or navigation onto the other
+- Hide core functionality on smaller devices (if it matters, make it work)
+- Lock orientation to dodge a layout bug
+- Trust simulators alone (posture, gestures, and performance need hardware)