feat(i18n): complete migration — items, entities, AI goals, GUI screens

119 new translation keys across 3 domains:
- Items/Blocks/Misc (46 keys): tooltips, action messages, trap states
- Entities/AI Goals (55 keys): NPC speech, maid/master/guard messages
- Client GUI (18 keys): widget labels, screen buttons, merchant display

Remaining 119 Component.literal() are all intentional:
- Debug/Admin/Command wands (47) — dev tools, not player-facing
- Entity display names (~25) — dynamic getNpcName() calls
- Empty string roots (~15) — .append() chain bases
- User-typed text (~10) — /me, /pm, /norp chat content
- Runtime data (~12) — StringBuilder, gag muffling, MCA compat

src/main/java/com/tiedup/remake/items/ItemKey.java

@@ -85,36 +85,25 @@ public class ItemKey extends ItemOwnerTarget {
 
         if (hasOwner(stack)) {
             tooltip.add(
-                Component.literal("Owner: ")
+                Component.translatable("item.tiedup.key.owner", getOwnerName(stack))
                     .withStyle(ChatFormatting.GOLD)
-                    .append(
-                        Component.literal(getOwnerName(stack)).withStyle(
-                            ChatFormatting.WHITE
-                        )
-                    )
             );
         } else {
             tooltip.add(
-                Component.literal(
-                    "Unclaimed (Right-click a collar wearer to claim)"
-                ).withStyle(ChatFormatting.GRAY)
+                Component.translatable("item.tiedup.key.unclaimed")
+                    .withStyle(ChatFormatting.GRAY)
             );
         }
 
         if (hasTarget(stack)) {
             tooltip.add(
-                Component.literal("Target: ")
+                Component.translatable("item.tiedup.key.target", getTargetName(stack))
                     .withStyle(ChatFormatting.BLUE)
-                    .append(
-                        Component.literal(getTargetName(stack)).withStyle(
-                            ChatFormatting.WHITE
-                        )
-                    )
             );
         }
 
         tooltip.add(
-            Component.literal("Right-click a collared player to toggle LOCK")
+            Component.translatable("item.tiedup.key.hint")
                 .withStyle(ChatFormatting.DARK_GRAY)
                 .withStyle(ChatFormatting.ITALIC)
         );