chore: rename app from Solitaire Quest to Ferrous Solitaire

Replace all display-name occurrences across web pages, Rust source,
docs, and Cargo metadata. Update localStorage token key from sq_token
to fs_token. Tagline "Klondike Solitaire" retained as genre descriptor.

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

docs/SESSION_HANDOFF.md

@@ -1,4 +1,4 @@
-# Solitaire Quest — Session Handoff (ARCHIVED)
+# Ferrous Solitaire — Session Handoff (ARCHIVED)
 
 > **This file is from Phase 2 (2026-04-25, 242 tests). It is kept for historical
 > reference only. The authoritative session handoff is at the repo root:
@@ -24,7 +24,7 @@ All seven Cargo crates created and compiling cleanly:
 | `solitaire_engine` | Stub | Bevy ECS systems — all plugins added in Phase 3 |
 | `solitaire_server` | Stub | Axum sync server — implemented in Phase 8C |
 | `solitaire_gpgs` | Compile-time stub | Google Play Games bridge — Android only, JNI in Phase: Android |
-| `solitaire_app` | Working | Opens blank Bevy window titled "Solitaire Quest" at 1280×800 |
+| `solitaire_app` | Working | Opens blank Bevy window titled "Ferrous Solitaire" at 1280×800 |
 
 Fast compile profiles, `assets/` directory structure, and `.env.example` are all in place.
 

docs/android_investigation.md

@@ -2,7 +2,7 @@
 
 > **Date:** 2026-04-28  
 > **Author:** Claude Code  
-> **Scope:** Feasibility analysis for porting Solitaire Quest to Android using cargo-mobile2
+> **Scope:** Feasibility analysis for porting Ferrous Solitaire to Android using cargo-mobile2
 
 ---
 

docs/superpowers/plans/2026-04-20-phase1-2-workspace-core.md

@@ -1,4 +1,4 @@
-# Solitaire Quest — Phase 1 + 2: Workspace & Core Game Engine
+# Ferrous Solitaire — Phase 1 + 2: Workspace & Core Game Engine
 
 > **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
 
@@ -555,7 +555,7 @@ fn main() {
         .add_plugins(
             DefaultPlugins.set(WindowPlugin {
                 primary_window: Some(Window {
-                    title: "Solitaire Quest".into(),
+                    title: "Ferrous Solitaire".into(),
                     resolution: (1280.0, 800.0).into(),
                     ..default()
                 }),
@@ -571,7 +571,7 @@ fn main() {
 ```bash
 cargo run -p solitaire_app --features bevy/dynamic_linking
 ```
-Expected: A blank Bevy window titled "Solitaire Quest" opens. Press Escape or close the window to exit. No panics or errors in the terminal.
+Expected: A blank Bevy window titled "Ferrous Solitaire" opens. Press Escape or close the window to exit. No panics or errors in the terminal.
 
 ---
 

docs/superpowers/plans/2026-04-23-phase4-statistics.md

@@ -1210,7 +1210,7 @@ fn main() {
         .add_plugins(
             DefaultPlugins.set(WindowPlugin {
                 primary_window: Some(Window {
-                    title: "Solitaire Quest".into(),
+                    title: "Ferrous Solitaire".into(),
                     resolution: (1280.0, 800.0).into(),
                     ..default()
                 }),

docs/sync_test_runbook.md

@@ -11,7 +11,7 @@
 ### Infrastructure
 
 - Two machines (or VMs) referred to as **Machine A** and **Machine B** throughout this runbook. Both must be able to reach the sync server over the network.
-- A running Solitaire Quest sync server reachable at a known URL, e.g. `https://solitaire.example.com`. See `README_SERVER.md` for setup.
+- A running Ferrous Solitaire sync server reachable at a known URL, e.g. `https://solitaire.example.com`. See `README_SERVER.md` for setup.
 - Verify the server is live before starting:
 
   ```bash

docs/ui-mockups/desktop-adaptation.md

@@ -3,7 +3,7 @@
 > **Why this exists.** The 24 mockups in this directory are mobile
 > (390 × 844 logical, iPhone 14 Pro frame) with one exception
 > (`home-menu-desktop.html`). The Stitch project that produced them
-> is named "Solitaire Quest *Mobile* Redesign" — the mobile-first
+> is named "Ferrous Solitaire *Mobile* Redesign" — the mobile-first
 > framing was deliberate when the new Android target opened, but
 > desktop is still the primary delivery surface. Porting the mobile
 > mockups 1:1 would land a 390-px-wide column floating in the middle