Add class adancement

module/models/class.mjs

@@ -68,6 +68,41 @@ export default class PrismRPGClass extends foundry.abstract.TypeDataModel {
       level10: new fields.HTMLField({ initial: "" })
     })
 
+    // Advancements (list of advancements per level with icon, name and description)
+    const advancementSchema = () => new fields.ArrayField(
+      new fields.SchemaField({
+        icon: new fields.StringField({
+          required: true,
+          initial: "",
+          label: "Icon"
+        }),
+        name: new fields.StringField({
+          required: true,
+          initial: "",
+          label: "Name"
+        }),
+        description: new fields.HTMLField({
+          required: true,
+          initial: "",
+          label: "Description"
+        })
+      }),
+      { initial: [] }
+    )
+
+    schema.advancements = new fields.SchemaField({
+      level1: advancementSchema(),
+      level2: advancementSchema(),
+      level3: advancementSchema(),
+      level4: advancementSchema(),
+      level5: advancementSchema(),
+      level6: advancementSchema(),
+      level7: advancementSchema(),
+      level8: advancementSchema(),
+      level9: advancementSchema(),
+      level10: advancementSchema()
+    })
+
     // Proficiencies granted by this class
     schema.weaponProficiencies = new fields.StringField({
       required: true,
@@ -156,4 +191,36 @@ export default class PrismRPGClass extends foundry.abstract.TypeDataModel {
     }
     return features
   }
+
+  /**
+   * Get the current level's advancements
+   */
+  get currentLevelAdvancements() {
+    return this.advancements[`level${this.level}`] || []
+  }
+
+  /**
+   * Get all advancements up to current level
+   */
+  get allAdvancementsUpToLevel() {
+    const advancements = []
+    for (let i = 1; i <= this.level; i++) {
+      const levelAdvancements = this.advancements[`level${i}`]
+      if (levelAdvancements && levelAdvancements.length > 0) {
+        advancements.push({
+          level: i,
+          advancements: levelAdvancements
+        })
+      }
+    }
+    return advancements
+  }
+
+  /**
+   * Get advancements for a specific level
+   */
+  getAdvancementsForLevel(level) {
+    if (level < 1 || level > 10) return []
+    return this.advancements[`level${level}`] || []
+  }
 }