Polish Milestone 7 models textures and link effects

docs/AGE_CLOUD_PLATFORM.md

@@ -1,7 +1,7 @@
-# Age arrival cloud platform
+# Age arrival platform
 
-Newly created Ages now place a 5×5 solid cloud platform instead of cobblestone at their saved spawn. The block has full collision, passes skylight, renders translucently, has no loot table, and cannot be obtained with pick-block. Existing Ages retain their already-placed platform; this change does not overwrite a player's saved world.
+Newly created Ages place a 5×5 solid platform instead of cobblestone at their saved spawn. The block has full collision, renders as an opaque full block, breaks as easily as glass (0.3 hardness), has no loot table, and cannot be obtained with pick-block. Existing Ages retain their already-placed platform blocks, which adopt the new appearance and hardness without altering saved terrain.
 
-The block texture is `assets/rivencraft/textures/block/cloud_platform.png`, verified at exactly 16×16 RGBA. Legacy's supplied assets contain no cloud-block texture, so this one was generated with the built-in image tool, then reduced by nearest-neighbor sampling. The final prompt requested a seamless Minecraft block-face pixel-art tile with 2–3 chunky white, icy-blue, and powder-blue cloud swirls, genuine transparent holes between them, strong 16×16-scale contrast, and no background or text.
+The model reuses `assets/rivencraft/textures/block/crystal_block.png`, the 16×16 Legacy crystal tile. The former generated cloud texture is removed. The internal block ID remains `rivencraft:cloud_platform` to preserve saved worlds.
 
 The separate [decay provider](INSTABILITY_DECAY.md) protects the saved spawn area by position, so its protection remains in force regardless of the platform's material.