refactor: extract inline HTML to templates, split oversized files, fix bugs

- Extract all inline HTML from JS into 21 Handlebars templates (chat/, dialogs/, ui/)
- Split utils.mjs (1507) into barrel + helpers.mjs, combat.mjs, d30.mjs
- Split roll.mjs (1632) into barrel + roll-base.mjs, roll-prompt.mjs, roll-combat.mjs, roll-damage.mjs
- Split lethal-fantasy.mjs (1426) into bootstrap + chat-reaction.mjs
- Fix: missing async on injectDiceTray (free-roll.mjs:29 SyntaxError)
- Fix: weapon._id fallback for deserialized chat-message weapon objects
- Fix: missing await on rollModifier.evaluate() calls in roll-combat.mjs
- Fix: choices→choicesList ReferenceError in utils.mjs
- Fix: add 12 missing i18n keys (chooseWeapon, chooseSave, attackRoll, etc.)
- Fix: restore sideLabel in bonus-die-select.hbs
- Clean: remove dead messageContent param, console.log→log()
- Style: barrel files preserve existing import paths

module/applications/free-roll.mjs

@@ -16,7 +16,7 @@ const DICE_TYPES = ["d4", "d6", "d8", "d10", "d12", "d20", "d30"]
  * @param {Application} _chatLog
  * @param {HTMLElement|jQuery} html
  */
-export function injectDiceTray(_chatLog, html) {
+export async function injectDiceTray(_chatLog, html) {
   const el = (html instanceof HTMLElement) ? html : (html[0] ?? html)
   if (!el?.querySelector) return
   if (el.querySelector(".lf-dice-tray")) return
@@ -24,27 +24,14 @@ export function injectDiceTray(_chatLog, html) {
   const bar = document.createElement("div")
   bar.className = "lf-dice-tray"
 
-  const diceButtons = DICE_TYPES.map(d =>
-    `<button type="button" class="lf-dt-die-btn" data-die="${d}" title="${d.toUpperCase()}">${d.toUpperCase()}</button>`
-  ).join("")
-
-  const countOptions = Array.from({ length: 9 }, (_, i) =>
-    `<option value="${i + 1}">${i + 1}</option>`
-  ).join("")
-
-  bar.innerHTML = `
-    <div class="lf-dt-row">
-      <span class="lf-dt-label"><i class="fa-solid fa-dice"></i></span>
-      <select class="lf-dt-count" title="${game.i18n.localize("LETHALFANTASY.DiceTray.CountTitle")}">
-        ${countOptions}
-      </select>
-      <div class="lf-dt-dice">${diceButtons}</div>
-      <label class="lf-dt-explode-label" title="${game.i18n.localize("LETHALFANTASY.DiceTray.ExplodeTitle")}">
-        <input type="checkbox" class="lf-dt-explode" />
-        <i class="fa-solid fa-explosion"></i>
-      </label>
-    </div>
-  `
+  const diceButtons = DICE_TYPES.map(d => ({ value: d, label: d.toUpperCase() }))
+  const countOptions = Array.from({ length: 9 }, (_, i) => i + 1)
+  bar.innerHTML = await foundry.applications.handlebars.renderTemplate("systems/fvtt-lethal-fantasy/templates/ui/dice-tray.hbs", {
+    countTitle: game.i18n.localize("LETHALFANTASY.DiceTray.CountTitle"),
+    explodeTitle: game.i18n.localize("LETHALFANTASY.DiceTray.ExplodeTitle"),
+    countOptions,
+    diceButtons
+  })
 
   bar.addEventListener("click", async ev => {
     const btn = ev.target.closest(".lf-dt-die-btn")
@@ -113,33 +100,19 @@ export async function rollFreeDie(dieType, count = 1, explode = false) {
     }
   }
 
-  const resultHtml = dieChips.map(chip => {
-    const isMax = !chip.exploded && chip.value === sides
-    const isMin = chip.value === 1
-    const explodeIcon = chip.exploded ? `<i class="fa-solid fa-burst lf-dt-explode-icon"></i>` : ""
-    const classes = ["lf-frc-die-chip", isMax ? "lf-frc-max" : "", isMin ? "lf-frc-min" : ""].filter(Boolean).join(" ")
-    return `<div class="${classes}">
-      <span class="lf-frc-die-type">${chip.label}</span>
-      <span class="lf-frc-die-sep">→</span>
-      <span class="lf-frc-die-val">${chip.value}${explodeIcon}</span>
-    </div>`
-  }).join("")
+  const dieChipsWithClasses = dieChips.map(chip => ({
+    ...chip,
+    classes: ["lf-frc-die-chip", !chip.exploded && chip.value === sides ? "lf-frc-max" : "", chip.value === 1 ? "lf-frc-min" : ""].filter(Boolean).join(" ")
+  }))
 
   const totalLabel = game.i18n.localize("LETHALFANTASY.Label.total").toUpperCase()
-  const content = `
-    <div class="lf-free-roll-card">
-      <div class="lf-frc-header">
-        <i class="fa-solid fa-dice"></i>
-        <span class="lf-frc-title-text">${game.i18n.localize("LETHALFANTASY.DiceTray.ChatTitle")}</span>
-        <span class="lf-frc-badge">${label}</span>
-      </div>
-      <div class="lf-frc-dice">${resultHtml}</div>
-      <div class="lf-frc-total-bar">
-        <span class="lf-frc-total-label">${totalLabel}</span>
-        <span class="lf-frc-total-value">${total}</span>
-      </div>
-    </div>
-  `
+  const content = await foundry.applications.handlebars.renderTemplate("systems/fvtt-lethal-fantasy/templates/chat/free-roll-card.hbs", {
+    titleText: game.i18n.localize("LETHALFANTASY.DiceTray.ChatTitle"),
+    badge: label,
+    dieChips: dieChipsWithClasses,
+    totalLabel,
+    total
+  })
 
   const rollMode = game.settings.get("core", "rollMode")
   // Normalize old-style rollMode keys (v12/v13) to new-style (v14), fallback to "public"