fix: restore TRX icon frame in overlay source (permanent)

TRX.svg used a full-bleed r=24 circle instead of the r=18 padded frame
every other token icon uses, making it inconsistent in the token list.

The 11 Jul fix (1b54fb3) patched only the merged root icon, not the
pezkuwi-overlay source. sync_from_nova.py::sync_icons() copies the overlay
over root unconditionally, so the BTC config pipeline re-run (78b0af9)
silently reverted the fix. Fix the overlay source too so re-merges keep it.

Root copy is now bit-identical to the blessed master version.

icons/tokens/colored/TRX.svg

@@ -1,4 +1,6 @@
 <svg width="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
-<circle cx="24" cy="24" r="24" fill="#EB0029"/>
+<circle cx="24" cy="24" r="18" fill="#EB0029"/>
+<g transform="translate(24 24) scale(0.75) translate(-24 -24)">
 <path fill-rule="evenodd" clip-rule="evenodd" d="M13 15.5L24.5 13L35 16.7L24.9 27.9L13 15.5ZM24.1 30.1L33.6 18.7L25.5 30.9L24.1 30.1ZM22.8 30.9L14.4 17L23 26.3L22.8 30.9Z" fill="white"/>
+</g>
 </svg>

pezkuwi-overlay/icons/tokens/colored/TRX.svg

@@ -1,4 +1,6 @@
 <svg width="48" height="48" viewBox="0 0 48 48" fill="none" xmlns="http://www.w3.org/2000/svg">
-<circle cx="24" cy="24" r="24" fill="#EB0029"/>
+<circle cx="24" cy="24" r="18" fill="#EB0029"/>
+<g transform="translate(24 24) scale(0.75) translate(-24 -24)">
 <path fill-rule="evenodd" clip-rule="evenodd" d="M13 15.5L24.5 13L35 16.7L24.9 27.9L13 15.5ZM24.1 30.1L33.6 18.7L25.5 30.9L24.1 30.1ZM22.8 30.9L14.4 17L23 26.3L22.8 30.9Z" fill="white"/>
+</g>
 </svg>