Add named equipment rewards

docs/DATA_MODEL.md

@@ -302,7 +302,7 @@ Physical hit chance is `90 + attacker AGI - target AGI - terrain avoid`, clamped
 
 ## Items
 
-Items start as static bonuses and consumable effects. Equipment leveling should later live on save-game item instances, not base item definitions. Consumables and unequipped weapon, armor, and accessory rewards are stored as campaign inventory counts and copied into the battle state when a scenario loads.
+Items start as static bonuses and consumable effects. Equipment leveling should later live on save-game item instances, not base item definitions. Consumables and unequipped weapon, armor, and accessory rewards are stored as campaign inventory counts and copied into the battle state when a scenario loads. Equipment can optionally set `rarity: "named"` to mark story-tier rewards while still using the same stackable inventory model as other equipment.
 
 ```json
 {
@@ -318,7 +318,7 @@ Items start as static bonuses and consumable effects. Equipment leveling should
 }
 ```
 
-Weapon `range` also uses `[min, max]`. When class and equipment both provide range, the runtime unit keeps the lowest minimum and highest maximum. Weapons can optionally define `effective_vs_move_types` plus `effective_bonus_damage` to add a small physical damage bonus during combat against targets with a matching runtime `move_type`; this is shown in attack forecasts, combat logs, shop stock, and equipment menus, but it does not mutate saved unit stats. The first examples are spear vs mounted, bow vs water, and axe vs foot. Accessories use `kind: "accessory"` with an `accessory_type` checked against the class `equipment_slots.accessory` list; `war_drum` and `imperial_seal` are the first branch-choice accessory rewards. Current equipment inventory is stackable stock only; unique equipment instances, durability, and enhancement are planned later. `war_axe` is a stronger axe reward for the Warrior/Bandit weapon family.
+Weapon `range` also uses `[min, max]`. When class and equipment both provide range, the runtime unit keeps the lowest minimum and highest maximum. Weapons can optionally define `effective_vs_move_types` plus `effective_bonus_damage` to add a small physical damage bonus during combat against targets with a matching runtime `move_type`; this is shown in attack forecasts, combat logs, shop stock, and equipment menus, but it does not mutate saved unit stats. The first examples are spear vs mounted, bow vs water, and axe vs foot. Accessories use `kind: "accessory"` with an `accessory_type` checked against the class `equipment_slots.accessory` list; `war_drum` and `imperial_seal` are the first branch-choice accessory rewards. Current equipment inventory is stackable stock only; unique equipment instances, durability, and enhancement are planned later. `war_axe` is a stronger axe reward for the Warrior/Bandit weapon family. The first named rewards are `yitian_sword`, `dragon_spear`, `wind_chaser_bow`, and `black_tortoise_robe`; their `rarity` tag is presentation-only and does not enforce uniqueness.
 
 Consumables use `kind: "consumable"` with effect records. `heal_hp` restores HP, `heal_mp` restores MP, and `cure_status` removes active battle-only effects with a matching `status` from a valid target; `Bean`, `Wine`, `Antidote`, and `Panacea` are the first examples. Item use consumes the acting unit's action and only commits to the save file on victory. Weapons, armor, and accessories can be granted through `rewards.items`; they are shown in inventory, can be equipped through the Equip menu before the unit moves or acts, and are not usable from the battle item menu.