fix(android): A2/A3/A4 — APK build doc, dead refs, modal hit targets

A2: docs/ANDROID.md — remove stale "permanent fix to come" note;
    clarify --lib is the canonical command; root-cause the upstream
    cargo-apk bug. SESSION_HANDOFF.md closes the open item.

A3: Remove dead CARD_PLAN.md references from four source module
    doc comments (theme/importer.rs, theme/plugin.rs, assets/mod.rs,
    assets/svg_loader.rs). Also fix stale "future picker UI" language
    in plugin.rs (picker shipped in Phase 7).

A4: ui_modal.rs spawn_modal_button — add min_height: Val::Px(48.0)
    so every modal action button meets Material's 48 dp touch target
    minimum. Modal button height was 42 px (2×SPACE_3 + TYPE_BODY_LG);
    now clamped to 48 px minimum. Cards at 40 dp on 360 dp phones are
    layout-constrained (7 columns) and cannot be widened.

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

solitaire_engine/src/assets/mod.rs

@@ -1,10 +1,8 @@
 //! Asset-loading infrastructure for runtime SVG rasterisation and the
 //! per-platform user-themes directory.
 //!
-//! See `CARD_PLAN.md` for the full multi-phase implementation plan.
-//! This module is the entry point for Phases 1 (SVG → `Image`) and 5
-//! (user-themes directory). Phase 3 will extend it further with custom
-//! `AssetSource` implementations for `embedded://` and `themes://`.
+//! Provides the SVG → `Image` loader and the `embedded://` / `themes://`
+//! custom `AssetSource` implementations used by the theme system.
 
 pub mod card_face_svg;
 pub mod icon_svg;

solitaire_engine/src/assets/svg_loader.rs

@@ -1,6 +1,6 @@
 //! Bevy `AssetLoader` that rasterises an SVG into `bevy::image::Image`.
 //!
-//! The card-theme system (see `CARD_PLAN.md`) ships SVG sources both as
+//! The card-theme system ships SVG sources both as
 //! the embedded default theme and as user-supplied themes. Bevy 0.18 has
 //! no built-in SVG support, so this loader bridges `usvg` (parser) +
 //! `resvg` (renderer) + `tiny-skia` (CPU pixmap) to produce textures

solitaire_engine/src/theme/importer.rs

@@ -1,6 +1,6 @@
 //! Theme zip-archive importer.
 //!
-//! Phase 7 of the card-theme system (see `CARD_PLAN.md`). Players ship
+//! Players ship
 //! and install third-party themes as a single `.zip` containing a
 //! `theme.ron` manifest at the archive root plus the 52 face SVGs and
 //! one back SVG referenced by that manifest. [`import_theme`] is the

solitaire_engine/src/theme/plugin.rs

@@ -3,10 +3,8 @@
 //! with the currently-loaded theme so existing card-rendering systems
 //! pick up the new artwork on the next state-changed tick.
 //!
-//! Phase 4 of `CARD_PLAN.md`. The plugin's `set_theme` helper is the
-//! public API that the future picker UI (Phase 6) calls; for now it's
-//! exposed for tests and for any embedder that wants to load an
-//! alternative theme manually.
+//! The plugin's `set_theme` helper is the public API used by the
+//! Settings appearance picker and exposed for tests.
 
 use std::collections::HashMap;
 

solitaire_engine/src/ui_modal.rs

@@ -372,6 +372,7 @@ pub fn spawn_modal_button<M: Component>(
             Button,
             Node {
                 padding: UiRect::axes(VAL_SPACE_4, VAL_SPACE_3),
+                min_height: Val::Px(48.0),
                 justify_content: JustifyContent::Center,
                 align_items: AlignItems::Center,
                 column_gap: VAL_SPACE_2,