Refine Writing Desk collection and ink refill behavior

README.md

@@ -25,15 +25,34 @@ It occupies two adjacent blocks, with one shared inventory; loaded paper and
 the selected page appear on its Legacy-inspired model.
 Desks placed before 0.3.6.1 keep their old one-block footprint until broken
 and placed again; leave an adjacent space when replacing one.
-Its four collection tabs, paper input, ink vial input, empty glass-bottle return,
+Its 88 collection tabs, paper input, ink vial input, empty glass-bottle return,
 16-unit ink meter, and inventory persist
 through world saves; breaking it drops stored contents. The desk screen is a
-functional foundation styled after Legacy's left tabs, central writing surface,
-and right inventory. Put vanilla paper in the
+functional foundation using Legacy's original desk and scrollbar textures.
+Four tabs are visible at once; the controls above and below them move by four
+(1–4, 5–8, through 85–88). Each viewer can browse a different group. Existing
+four-tab desks retain their collections and supplies when upgraded.
+With a notebook selected, pick up a Page from your inventory and click an empty
+position on the left surface to store one page there. Clear search/filter/sort
+and turn off `ALL` to place pages at specific positions; occupied positions are
+never overwritten. A notebook tab exposes all 27 notebook positions (scroll to
+reach the rest); a loose-page tab exposes only its one occupied position.
+Empty tabs have no page storage until a notebook or page is put in the tab slot.
+Click a page on the desk surface to select it for copying. Drag a page from one
+notebook position to an empty position to move it, or onto another page to swap
+their positions. This also works between notebooks shown in the `ALL` view.
+Drag a page out of the panel to turn it back into an item. Drop it over a player
+inventory slot or desk tab to place it there; a tab with a notebook adds it to
+the first open position. Dropping elsewhere leaves the page on the cursor for
+normal inventory placement. The source notebook or tab loses the page only after
+a valid drop.
+Put vanilla paper in the
 upper-left slot and Ink Vials in the upper-right; a copy appears in the
 lower-left result slot when the selected page is valid. Taking it consumes one
-paper and, by default, one ink. An empty meter consumes a vial to refill and
-returns a vanilla glass bottle to the lower-right slot. The `AZ` control sorts
+paper and, by default, one ink. An available vial refills an empty ink meter
+when inserted or when copying uses its last ink, and returns a vanilla glass
+bottle to the lower-right slot. Removing a bottle also retries a blocked refill.
+Refilling waits if that slot is full or contains another item. The `AZ` control sorts
 visible pages by name; `ALL` shows pages held across every desk tab. Search and
 category filtering narrow the view without granting new pages, and cross-tab
 copy selection is checked by the server.