site 1.4.2: Pionaarr mods, player blue, short tiles, CUE logo, legal pages, local fonts

- advanced_waveforms listed as a Pionaarr mod; "ours" is "Pionaarr mod" everywhere.
- The player's blue (title bar) instead of the orange; flat CUE key as logo and favicon.
- Mod tiles: one emulator shot and one or two sentences each; 3-band shown (in testing).
- No command line on the main page (it is in the docs); round BEAT DIVIDE keys for the LEDs.
- Impressum and Datenschutzerklaerung (AT/DE); fonts served from assets/fonts (OFL).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

assets/favicon.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="64" height="64" viewBox="0 0 64 64">
+  <circle cx="32" cy="32" r="31" fill="#0b0c10"/>
+  <circle cx="32" cy="32" r="28" fill="none" stroke="#ff8a1f" stroke-width="5"/>
+  <circle cx="32" cy="32" r="22" fill="#16181d"/>
+  <text x="32" y="38.5" text-anchor="middle" font-family="Arial, Helvetica, sans-serif" font-weight="700" font-size="17" fill="#eef0f4" letter-spacing=".5">CUE</text>
+</svg>