Adopt Ghostwire name and approved ghost mascot

assets/README.md

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+# Ghostwire brand assets
+
+Ghostwire's mascot is a minimal white ghost with a black outline, angry eyes and a mischievous smile. Use it with the project name **Ghostwire**. The optional tagline is **Inside the process. Across the wire.**
+
+- [ghostwire-icon.svg](ghostwire-icon.svg): editable vector master, white ghost on a transparent background.
+- [ghostwire-icon.png](ghostwire-icon.png): 512 × 512 PNG on white, suitable for repository avatars and previews.
+
+Prefer the SVG for resizing. Preserve the silhouette, facial expression and proportions. Use on a light background, with space around the icon. Avoid gradients, shadows or stretching. The icon is independent of WhatsApp's branding.
+
+These are visual identity assets, not runtime dependencies. See [licensing status](../LICENSE.md) for the repository's current terms.

assets/ghostwire-icon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 128 128" role="img" aria-labelledby="title desc">
+  <title id="title">Ghostwire ghost mascot</title>
+  <desc id="desc">A minimal white ghost with a black outline, angry eyes and a mischievous smile.</desc>
+  <path d="M30 100V56C30 35 45 21 64 21S98 35 98 56V100C91 94 89 94 82 101S72 107 65 101S55 94 48 101S38 107 30 100Z"
+        fill="#fff" stroke="#000" stroke-width="4.5" stroke-linecap="round" stroke-linejoin="round"/>
+  <path d="M43 51L60 58C58 64 54 67 49 65S43 59 43 51ZM85 51L68 58C70 64 74 67 79 65S85 59 85 51Z" fill="#000"/>
+  <path d="M52 77C60 83 69 83 77 75" fill="none" stroke="#000" stroke-width="4" stroke-linecap="round"/>
+</svg>