feat(assets): replace TTS posts placeholder banners/OGs with Ideogram 4 3D cyber-bento renders

scripts/og-gen/metaphors.json

@@ -77,6 +77,6 @@
   "why-your-headless-browser-cant-scrape-everything": "Two identical dark vault chambers side by side, one sealed shut behind a wall of blank grey panels while the other stands open with warm light spilling from inside",
   "your-disk-full-alert-is-lying": "A tall nearly empty barrel of enormous capacity with a tiny amber fill line at its base, while a thin illuminated arc above it strains against its stop",
   "yue2-on-a-12gb-gpu-songs-that-lost-their-endings": "A row of slender dark glass tubes standing upright in a black rack on a machined rail, a single horizontal blade bar sweeping across them and cutting every one at the same height, the severed upper segments laid out in a shallow tray beside the rail",
-  "self-hosted-tts-cosyvoice2-n8n-gpu": "A precision obsidian audio synthesizer node with a glowing cyan neural resonance chamber, coupled by a blue optical conduit to a stacked server rack on a dark granite bench",
-  "why-is-my-tts-model-repeating-percent": "A crystalline text ribbon entering a dual-baffle cleaning chamber, filtering out glowing green percentage glyphs while emitting a clean amber sound wave into an acoustic horn"
+  "self-hosted-tts-cosyvoice2-n8n-gpu": "A modular dark obsidian voice synthesiser console clamped to a finned copper heatsink pedestal, emitting two floating cyan wave conduits into an automated output port",
+  "why-is-my-tts-model-repeating-percent": "A precision optical filter prism mounted on a slotted rail, separating an irregular tangled beam of light into three smooth harmonic wave channels"
 }