Clean release snapshot

static/v3/brand/favicon.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64" role="img" aria-label="fee[dB]ack">
+  <!-- fee[dB]ack app mark: the [dB] motif (decibel pun) on the navy tile.
+       Sky dB with dimmer brackets; legible down to favicon sizes. -->
+  <rect width="64" height="64" rx="14" fill="#111827"/>
+  <text x="32" y="33" text-anchor="middle" dominant-baseline="central"
+        font-family="Inter, system-ui, -apple-system, Segoe UI, sans-serif"
+        font-weight="800" font-size="30" letter-spacing="-1">
+    <tspan fill="#94a3b8">[</tspan><tspan fill="#0ea5e9">dB</tspan><tspan fill="#94a3b8">]</tspan>
+  </text>
+</svg>

static/v3/brand/feedback-wordmark.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 300 64" role="img" aria-label="fee[dB]ack">
+  <!-- Full fee[dB]ack wordmark: fee + ack in primary text, [dB] in sky.
+       The brackets are literal characters, not borders (design-system §4). -->
+  <text x="6" y="32" dominant-baseline="central"
+        font-family="Inter, system-ui, -apple-system, Segoe UI, sans-serif"
+        font-weight="800" font-size="40" letter-spacing="-1.5">
+    <tspan fill="#f8fafc">fee</tspan><tspan fill="#0ea5e9">[dB]</tspan><tspan fill="#f8fafc">ack</tspan>
+  </text>
+</svg>