feat: add Settlement actor type with Overview/Buildings/Inventory tabs

- New TypeDataModel: archetype, territory, renown, currency (gp/sp/cp),
  garrison, underSiege, isCapital, founded, taxNotes, description, notes
- 3-tab ApplicationV2 sheet with drag & drop for building/weapon/armor/equipment
- Currency steppers (+/−), building constructed toggle, qty controls
- LESS-based CSS (settlement-sheet.less) + base.less updated for shared styles
- Full i18n keys in lang/en.json (8 settlement archetypes)
- system.json: registered settlement actor type

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

module/applications/sheets/character-sheet.mjs

@@ -37,6 +37,8 @@ export default class OathHammerCharacterSheet extends OathHammerActorSheet {
       rollInitiative:  OathHammerCharacterSheet.#onRollInitiative,
       adjustQty:       OathHammerCharacterSheet.#onAdjustQty,
       adjustCurrency:  OathHammerCharacterSheet.#onAdjustCurrency,
+      adjustStress:    OathHammerCharacterSheet.#onAdjustStress,
+      clearStress:     OathHammerCharacterSheet.#onClearStress,
     },
   }
 
@@ -201,6 +203,7 @@ export default class OathHammerCharacterSheet extends OathHammerActorSheet {
         break
       case "magic":
         context.tab = context.tabs.magic
+        context.stressBlocked = doc.system.arcaneStress.value >= doc.system.arcaneStress.threshold
         context.spells = doc.itemTypes.spell.map(s => ({
           id: s.id, uuid: s.uuid, img: s.img, name: s.name, system: s.system,
           _descTooltip: _stripHtml(s.system.effect)
@@ -404,6 +407,17 @@ export default class OathHammerCharacterSheet extends OathHammerActorSheet {
     const current = foundry.utils.getProperty(this.document, field) ?? 0
     await this.document.update({ [field]: Math.max(0, current + delta) })
   }
+
+  static async #onAdjustStress(event, target) {
+    const delta   = parseInt(target.dataset.delta, 10)
+    const current = this.document.system.arcaneStress.value ?? 0
+    const max     = this.document.system.arcaneStress.threshold
+    await this.document.update({ "system.arcaneStress.value": Math.max(0, Math.min(max, current + delta)) })
+  }
+
+  static async #onClearStress(_event, _target) {
+    await this.document.update({ "system.arcaneStress.value": 0 })
+  }
 }
 
 /** Strip HTML tags and collapse whitespace for use in data-tooltip attributes. */