Fix achievement icons in launcher, allow opening OAuth URLs, live map docs

- Shared achievement icon catalogue; launcher resolves icon/background/border ids
- Tauri opener capability now allows http(s) URLs (fixes Discord sign-in)
- Rewrite live map docs, admin guide progression section

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjMbLQujBHunCCu5GpsHaT

launcher/src/components/PlayerProfileModal.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import AchievementIcon from './AchievementIcon.svelte';
   import { onMount } from 'svelte';
   import {
     X, Trophy, Shield, Heart, Image as ImageIcon, Send, Edit3, Check,
@@ -338,9 +339,7 @@
               <div class="ach-grid">
                 {#each profile.achievements as ach (ach.id)}
                   <div class="ach-item glass" class:frame-challenge={ach.frame_type === 'challenge'}>
-                    <div class="ach-icon-box" style:background={ach.icon_bg || 'rgba(0,0,0,0.5)'}>
-                      <span>{ach.icon_item || '🏆'}</span>
-                    </div>
+                    <AchievementIcon {ach} size={2.2} />
                     <div class="ach-meta">
                       <span class="ach-name">{ach.title}</span>
                       <p class="ach-sub tiny muted">{ach.description}</p>
@@ -760,15 +759,6 @@
     border-radius: var(--radius-sm);
     border: 1px solid var(--line);
   }
-  .ach-icon-box {
-    width: 2.2rem;
-    height: 2.2rem;
-    border-radius: 4px;
-    display: grid;
-    place-items: center;
-    font-size: 1.1rem;
-    flex-shrink: 0;
-  }
   .ach-meta {
     flex: 1;
     display: flex;