refactor: add quest view layer

Create quest.view.ts with UI logic extracted from quests command:
- getQuestListEmbed() for quest log display
- formatQuestRewards() helper for reward formatting
- getQuestStatus() helper for status display

Updated quests.ts to use view functions instead of inline embed building.

src/commands/quest/quests.ts

@@ -1,7 +1,8 @@
 import { createCommand } from "@/lib/utils";
 import { SlashCommandBuilder, MessageFlags } from "discord.js";
 import { questService } from "@/modules/quest/quest.service";
-import { createWarningEmbed, createBaseEmbed } from "@lib/embeds";
+import { createWarningEmbed } from "@lib/embeds";
+import { getQuestListEmbed } from "@/modules/quest/quest.view";
 
 export const quests = createCommand({
     data: new SlashCommandBuilder()
@@ -17,21 +18,7 @@ export const quests = createCommand({
             return;
         }
 
-        const embed = createBaseEmbed("📜 Quest Log", undefined, "Blue");
-
-        userQuests.forEach(entry => {
-            const status = entry.completedAt ? "✅ Completed" : "In Progress";
-            const rewards = entry.quest.rewards as { xp?: number, balance?: number };
-            const rewardStr = [];
-            if (rewards?.xp) rewardStr.push(`${rewards.xp} XP`);
-            if (rewards?.balance) rewardStr.push(`${rewards.balance} 🪙`);
-
-            embed.addFields({
-                name: `${entry.quest.name} (${status})`,
-                value: `${entry.quest.description}\n**Rewards:** ${rewardStr.join(", ")}\n**Progress:** ${entry.progress}%`,
-                inline: false
-            });
-        });
+        const embed = getQuestListEmbed(userQuests);
 
         await interaction.editReply({ embeds: [embed] });
     }