Add: armor plates support with new database tables and loadout functionality

fix: only required mods are applied to guns for weight management.

migrations_v2.sql

@@ -60,6 +60,26 @@ CREATE TABLE IF NOT EXISTS gun_slot_items (
 
 CREATE INDEX IF NOT EXISTS idx_gun_slot_items_item ON gun_slot_items(item_id);
 
+-- Open plate slots on armor/rig carriers (ItemArmorSlotOpen from tarkov API)
+-- Weight of a carrier does NOT include plates in these slots
+CREATE TABLE IF NOT EXISTS armor_open_slots (
+    carrier_id  TEXT NOT NULL REFERENCES gear_items(id) ON DELETE CASCADE,
+    slot_nameid TEXT NOT NULL,  -- e.g. "front_plate", "back_plate", "left_side_plate"
+    zones       TEXT,           -- comma-separated zone names e.g. "FR. PLATE,BCK. PLATE"
+    PRIMARY KEY (carrier_id, slot_nameid)
+);
+
+-- Which plates are compatible with each open slot on a carrier
+CREATE TABLE IF NOT EXISTS armor_slot_plates (
+    carrier_id  TEXT NOT NULL,
+    slot_nameid TEXT NOT NULL,
+    plate_id    TEXT NOT NULL REFERENCES gear_items(id) ON DELETE CASCADE,
+    PRIMARY KEY (carrier_id, slot_nameid, plate_id),
+    FOREIGN KEY (carrier_id, slot_nameid) REFERENCES armor_open_slots(carrier_id, slot_nameid) ON DELETE CASCADE
+);
+
+CREATE INDEX IF NOT EXISTS idx_armor_slot_plates_plate ON armor_slot_plates(plate_id);
+
 -- Saved loadout builds
 CREATE TABLE IF NOT EXISTS saved_builds (
     id          INTEGER PRIMARY KEY AUTOINCREMENT,