Port lectern stands, book GUIs and progression to 26.3 beta

ports/mc263/RELEASE_NOTES_1.0.1.115-beta.1.md

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+# Rivencraft 26.3 beta 1.0.1.115-beta.1
+
+Collects the player-validated port slices .107–.115 since 1.0.1.106-beta.1.
+Minecraft 26.3, NeoForge 26.3.0.99 and Java 25. This remains a beta with
+incomplete Minecraft 1.21.1 gameplay and optional-integration parity.
+
+## Book stands and dropped books
+
+- Place a Linking Book, Descriptive Book or Page on an empty vanilla lectern
+  to convert it into a Rivencraft book stand, preserving facing. Occupied
+  vanilla lecterns are left alone.
+- Books use the existing open-book model and textures and show their name
+  above the stand. Pages use their item artwork without a hover label,
+  retaining the 1.21.1 orientation corrections.
+- Open a bound book with an empty hand, then click its destination panel to
+  travel while leaving the book on its stand. Existing link modifiers,
+  same-dimension rules, Return Link configuration and Age-entry awards apply.
+- Shift-right-click with an empty hand retrieves the stored item and restores
+  a vanilla lectern. Breaking returns one lectern and its contents. Unwritten
+  books can be displayed; retrieve them to bind in hand in this beta.
+- Ordinary dropped Linking/Descriptive Books now become recoverable open-book
+  entities, including unwritten books, inventory/player drops, container and
+  stand drops, death/Disarm drops and ordinary book entities loaded from disk.
+- Conversion preserves the stack and components, position, motion, facing,
+  pickup delay and ownership/thrower metadata. It uses the existing open-book
+  lifetime, slow decay and water/rain behavior. Already-custom books and
+  non-book items are skipped.
+- Conversion runs after registration without world scans or force-loading.
+  The original is removed only after replacement succeeds; a canceled
+  replacement leaves the ordinary item intact and eligible on a later reload.
+- Stand travel validates source dimension, distance, loaded chunk and the exact
+  currently stored book, rejecting stale screens after removal/replacement.
+
+## Book GUIs and names
+
+- Descriptive Books reuse the Legacy gilded cover, name/author front spread,
+  and one authored symbol at a time on following right-hand pages. Saved page
+  order and repetitions are retained, with runtime glyphs and no extra item outline.
+- New Descriptive Books record their author server-side. Older books without
+  that metadata use the unknown-author label.
+- Linking Books use the plain Legacy cover, wrapped title, destination name
+  and block coordinates, plus the blank final spread. Return Links suppress
+  the redundant title. Bottom corners or arrow keys turn pages with sound.
+- Both GUIs share the Legacy artwork/text/counter/corner helpers. Naming
+  controls hide on later pages and remain correct after resizing. Escape closes
+  even with naming focused; normal text input does not trigger inventory keys.
+- Ported the existing 1.21.1 fallback's animated teal spiral panel to both GUIs,
+  including lecterns. Removed placeholder labels. The Legacy frame draws over
+  the animation; travel is active only on the front panel.
+- The animated fallback is not a live destination view. Destination tint,
+  snapshot renderer integrations and random-Age glyph descriptions remain pending.
+- New Ages save their entered display name independently of their ID, folder
+  and seed. Newly bound Linking Books and automatic Return Links capture their
+  destination/departure label for both GUI and tooltip. Older Ages/books retain
+  vanilla-name or dimension-ID fallbacks; existing labels are not rewritten.
+- Corrected negative tooltip coordinates to floor consistently with the GUI.
+
+## Progression and recipe discovery
+
+- Ported the Rivencraft advancement tree: root, obtaining a Page/Linking Book,
+  taking a Link Panel from the Ink Mixer, copying a Page, binding an Age and
+  successfully travelling into an Age. Action awards occur after committed
+  server actions, including normal and shift pickup; previews earn nothing.
+- The advancement background uses the existing blue Crystal Block texture,
+  with the corrected 26.3 resource-path format. The portal node waits for the
+  Receptacle/portal port.
+- Added recipe-book discovery for Ink Vials (Black Dye), Ink Mixers (Glass
+  Bottle), Book Binders (Iron Ingot) and Crystal Blocks (Crystal Shard), alongside
+  the Notebook and Writing Desk unlocks. Three-by-three recipes appear in a
+  Crafting Table's recipe book, not the inventory's two-by-two book.
+- Ingredients and costs are unchanged. Blank Pages remain uncraftable.
+
+## Validation and remaining work
+
+- Player in-game checks passed each slice and the final dropped-book changes.
+- The 26.3 and independent 1.21.1 builds passed. Gradle test tasks have no
+  standalone test sources; targeted disposable-server fixtures covered real
+  station actions, advancements/recipe unlocks, stand ownership/drops and
+  persistence, book author/page/name persistence, and drop conversion/state.
+- Temporary test servers were stopped and their worlds deleted. A no-player
+  entity fixture required one loaded fixture chunk for inspection; further
+  visual/restart validation was handed to the player.
+- 1.21.1 gameplay code is unchanged. Shared issue #114 remains open for its
+  matching universal dropped-book fix; Writing Desk model placement stays in #113.
+- Instability, full writing recovery, discovery/library loot, crystal portals,
+  remaining stations/progression and optional integrations still need port work.
+
+Keep 26.3 and 1.21.1 instances/saves separate and back up beta worlds before updating.