Release 26.3.0.1 with live Reborn views and random page policies

ports/mc263/TESTING_1.0.1.137-beta.1.md

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+# Random Page policy test — 1.0.1.137-beta.1
+
+Install the new JAR and launch once so the new entries appear in
+Minecraft's config/rivencraft-local.toml. Close the instance before editing.
+On a dedicated server edit its own config, not the client's.
+
+For a visible check, replace only the existing random_pages section with:
+
+```toml
+[random_pages]
+allowlist = ["terrain/flat", "biome/single", "biome/plains", "sky/static", "lighting/normal", "weather/off", "feature/not_present"]
+blocklist = ["sky/nether", "celestial/sun", "celestial/moon"]
+```
+
+The deliberately nonexistent feature entry restricts only optional features,
+leaving an empty feature pool for this test.
+
+1. Bind a Descriptive Book with only a Link Panel. Enter it: expect Flat terrain,
+   Plains, Static Sky, normal lighting, no rain and no suns/moons. Optional Page
+   features/structures should be absent; native biome decoration is independent.
+2. Bind an authored Flat/Plains/Single/Nether Sky book. Nether Sky remains usable
+   despite the blocklist; the setting controls random generation and direct
+   library loot, not manual authorship. The Page remains visible in Creative/JEI.
+3. Change sky/static to sky/end, restart and revisit the first Age. It must retain
+   Static Sky. A newly bound Link-Panel-only book should get End Sky.
+4. Optional library check: allowlist = ["sky/static"], blocklist = ["sky/nether"].
+   New library direct Pages may include Static Sky or other unrestricted
+   categories, but never another Sky Page. Test both library loot modes where
+   desired. Existing chests/stands remain untouched; AGE_ONLY may have no Pages
+   when the book's written Page set has no eligible entries.
+
+Restore both lists to [] afterward unless you want the restrictions to persist.
+No existing Age should change. Keep the full world backup customary for beta
+updates. Native biome presets and required minimum-biome fallbacks intentionally
+bypass biome-Page filters; Sealed Notebooks keep their separate 1.21.1 draw pool.