feat(v1.1.0): add send mail support via Graph API and SMTP

app/api/emails.py

@@ -1,6 +1,6 @@
 from flask import Blueprint, jsonify, request
 from app.models import Account
-from app.services import graph, imap, verification
+from app.services import graph, imap, smtp, verification
 import os
 
 bp = Blueprint("emails", __name__, url_prefix="/api/emails")
@@ -28,7 +28,6 @@ def get_emails():
             token = token_res["access_token"]
             messages = graph.fetch_messages(token, top=15, proxy_url=proxy_url)
     else:
-        # Fallback to IMAP
         messages = imap.fetch_inbox_messages(
             email=acct.email,
             password=acct.password or acct.refresh_token,
@@ -51,3 +50,52 @@ def get_emails():
         })
         
     return jsonify(results)
+
+@bp.post("/send")
+def send_email():
+    data = request.json or {}
+    email = data.get("email")
+    to_email = data.get("to_email")
+    subject = data.get("subject", "No Subject")
+    body = data.get("body", "")
+    
+    if not email or not to_email:
+        return jsonify({"error": "email and to_email required"}), 400
+        
+    acct = Account.query.filter_by(email=email).first()
+    if not acct:
+        return jsonify({"error": "account not found"}), 404
+        
+    proxy_url = os.getenv("PROXY_URL")
+    
+    if acct.method == "graph":
+        token_res = graph.get_access_token_graph_result(
+            client_id=acct.client_id,
+            refresh_token=acct.refresh_token,
+            proxy_url=proxy_url
+        )
+        if isinstance(token_res, dict) and "access_token" in token_res:
+            token = token_res["access_token"]
+            success = graph.send_mail_graph(token, to_email, subject, body, proxy_url=proxy_url)
+            if success:
+                return jsonify({"success": True, "message": "Email sent via Graph API"})
+            return jsonify({"error": "Graph API send mail failed"}), 500
+        return jsonify({"error": "Token refresh failed"}), 400
+    else:
+        try:
+            success = smtp.send_mail_smtp(
+                host=os.getenv("SMTP_HOST", "smtp.office365.com"),
+                port=int(os.getenv("SMTP_PORT", "587")),
+                username=acct.email,
+                password=acct.password or acct.refresh_token,
+                to_email=to_email,
+                subject=subject,
+                body_text=body,
+                use_tls=True
+            )
+            if success:
+                return jsonify({"success": True, "message": "Email sent via SMTP"})
+        except Exception as e:
+            return jsonify({"error": f"SMTP send mail failed: {str(e)}"}), 500
+            
+    return jsonify({"error": "Send mail failed"}), 500