chore: état initial avant refonte (atlas SvelteKit v4.0.0)

Snapshot de l'existant avant application du playbook OKI :
background shader Three.js, carte graphe 3D, timeline statique.

atlas-fediverse/static/icons/logo.svg

@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" role="img" aria-label="Logo Atlas Fédiverse">
+	<defs>
+		<linearGradient id="g" x1="0" y1="0" x2="1" y2="1">
+			<stop offset="0" stop-color="#F72585" />
+			<stop offset="1" stop-color="#4CC9F0" />
+		</linearGradient>
+	</defs>
+	<circle cx="256" cy="256" r="196" fill="#012A4A" />
+	<circle cx="256" cy="256" r="196" fill="none" stroke="url(#g)" stroke-width="20" />
+	<ellipse cx="256" cy="256" rx="92" ry="196" fill="none" stroke="#4CC9F0" stroke-width="12" opacity="0.75" />
+	<path d="M 74 256 H 438" stroke="#4CC9F0" stroke-width="12" opacity="0.75" />
+	<path d="M 104 168 Q 256 226 408 168" fill="none" stroke="#4CC9F0" stroke-width="10" opacity="0.5" />
+	<path d="M 104 344 Q 256 286 408 344" fill="none" stroke="#4CC9F0" stroke-width="10" opacity="0.5" />
+	<circle cx="256" cy="60" r="20" fill="#F72585" />
+	<circle cx="122" cy="336" r="16" fill="#06D6A0" />
+	<circle cx="390" cy="336" r="16" fill="#F9C74F" />
+</svg>