Baseline: full tree snapshot after git repository loss

The previous .git directory was found gutted (only info/ remained), so
history is unrecoverable locally. This commit restores version control
with the tree exactly as it stands: the working app, the preview-tracks
launcher on the artist hero, the scrollable-track-previews design bundle
(docs + approved mockups), and the Phase 0 validation artifacts.

src-tauri/icon-source.svg

@@ -0,0 +1,30 @@
+<svg width="1024" height="1024" viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#1ed760"/>
+      <stop offset="1" stop-color="#0f9d47"/>
+    </linearGradient>
+    <linearGradient id="wave" x1="0" y1="0" x2="0" y2="1">
+      <stop offset="0" stop-color="#062412"/>
+      <stop offset="1" stop-color="#0a3a1d"/>
+    </linearGradient>
+  </defs>
+
+  <rect width="1024" height="1024" rx="230" fill="url(#bg)"/>
+
+  <!-- sound-wave bars forming an 'S' rhythm -->
+  <g fill="url(#wave)">
+    <rect x="250" y="430" width="58" height="164" rx="29"/>
+    <rect x="346" y="360" width="58" height="304" rx="29"/>
+    <rect x="442" y="270" width="58" height="484" rx="29"/>
+    <rect x="538" y="360" width="58" height="304" rx="29"/>
+    <rect x="634" y="430" width="58" height="164" rx="29"/>
+  </g>
+
+  <!-- plus badge -->
+  <circle cx="760" cy="300" r="120" fill="#062412"/>
+  <g fill="#1ed760">
+    <rect x="742" y="238" width="36" height="124" rx="18"/>
+    <rect x="698" y="282" width="124" height="36" rx="18"/>
+  </g>
+</svg>