Claude detection respects payment filter, add project skill

- Backend check-claude-payment accepts optional emails list
- Frontend sends filtered emails when filter is active
- Button label updates to show current filter scope
- Add project skill for development guidance

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

static/script.js

@@ -110,6 +110,7 @@ class MailManager {
             this.paymentFilter = e.target.value;
             this.page = 1;
             this.loadAccounts();
+            this.updateClaudeBtnLabel();
         });
 
         // 刷新
@@ -1144,15 +1145,49 @@ class MailManager {
         }
     }
 
+    updateClaudeBtnLabel() {
+        const btn = document.getElementById('claudePaymentBtn');
+        if (!btn || btn.disabled) return;
+        const filterSelect = document.getElementById('paymentFilter');
+        const filterText = filterSelect.options[filterSelect.selectedIndex].text;
+        if (this.paymentFilter) {
+            btn.innerHTML = `<i class="bi bi-credit-card"></i><span>检测(${filterText})</span>`;
+        } else {
+            btn.innerHTML = '<i class="bi bi-credit-card"></i><span>Claude检测</span>';
+        }
+    }
+
     async startClaudePaymentCheck() {
         const btn = document.getElementById('claudePaymentBtn');
         if (!btn) return;
+
+        // 根据筛选条件决定检测范围
+        let targetEmails = [];
+        if (this.paymentFilter && this._allAccounts) {
+            targetEmails = this._allAccounts
+                .filter(acc => this._matchPaymentFilter(acc.email))
+                .map(acc => acc.email);
+        }
+
+        const label = this.paymentFilter
+            ? `检测 ${targetEmails.length} 个`
+            : '全部检测';
+
+        if (targetEmails.length === 0 && this.paymentFilter) {
+            this.showToast('当前筛选条件下没有账号', 'warning');
+            return;
+        }
+
         btn.disabled = true;
         const origHtml = btn.innerHTML;
         btn.innerHTML = '<i class="bi bi-hourglass-split"></i><span>检测中...</span>';
 
         try {
-            const response = await fetch('/api/tools/check-claude-payment', { method: 'POST' });
+            const response = await fetch('/api/tools/check-claude-payment', {
+                method: 'POST',
+                headers: { 'Content-Type': 'application/json' },
+                body: JSON.stringify({ emails: targetEmails })
+            });
             const reader = response.body.getReader();
             const decoder = new TextDecoder();
             let buffer = '';