feat(web): lien « Buy me a coffee » (nav, réglages, funding)

- constante BUYMEACOFFEE_URL ; item de nav « Offrez-moi un café »
- section support dans les Réglages + i18n EN/FR
- champ `funding` dans le package.json publié ; mentions README EN/FR

packages/web/src/views/SettingsView.vue

@@ -178,13 +178,31 @@
       </dl>
       <SkeletonRow v-else />
     </section>
+
+    <!-- Support -->
+    <section class="card flex flex-col gap-3">
+      <h2 class="flex items-center gap-2 text-sm font-semibold text-zinc-100">
+        <Coffee :size="16" /> {{ t('settings.support') }}
+      </h2>
+      <p class="text-xs text-zinc-500">{{ t('settings.supportHint') }}</p>
+      <div>
+        <a
+          :href="BUYMEACOFFEE_URL"
+          target="_blank"
+          rel="noopener noreferrer"
+          class="inline-flex h-9 items-center justify-center gap-1.5 rounded-lg border border-zinc-700 bg-zinc-800 px-3 text-sm font-medium text-zinc-200 transition-colors hover:bg-zinc-700 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-emerald-500/70 focus-visible:ring-offset-2 focus-visible:ring-offset-zinc-950"
+        >
+          <Coffee :size="16" /> {{ t('settings.supportCta') }}
+        </a>
+      </div>
+    </section>
   </div>
 </template>
 
 <script setup lang="ts">
 import { computed, onMounted, ref } from 'vue';
 import { useI18n } from 'vue-i18n';
-import { Bell, BellOff, Check, Copy, Download, FolderOpen, KeyRound, Plus, RefreshCw, ScanSearch, Send, Server, Shield, SlidersHorizontal, Trash2, X } from '@lucide/vue';
+import { Bell, BellOff, Check, Coffee, Copy, Download, FolderOpen, KeyRound, Plus, RefreshCw, ScanSearch, Send, Server, Shield, SlidersHorizontal, Trash2, X } from '@lucide/vue';
 import type {
   AuditLogEntry,
   AuditLogsResponse,
@@ -195,6 +213,7 @@ import type {
   TokensListResponse,
 } from '@arboretum/shared';
 import { api, ApiError } from '../lib/api';
+import { BUYMEACOFFEE_URL } from '../lib/constants';
 import { useSettingsStore } from '../stores/settings';
 import { usePushStore } from '../stores/push';
 import { useToastsStore } from '../stores/toasts';