feat: frps-manager v1.0 - frp 0.70.1 multi-tenant web management system

- Multi-tenant client/proxy management with Flask+SQLite
- Frps server control (start/restart/token rotation)
- Generate frpc.ini with shared server token + admin API
- Dashboard API integration (live client/proxy status)
- RBAC: admin/tenant_admin/user roles
- Audit logging for all operations
- Systemd service files included
- Requires legacy INI format (frp 0.70 TOML auth broken)

templates/frpc.toml.j2

@@ -0,0 +1,46 @@
+# Generated by frps-manager for client: {{ client.name }}
+# Copy to your frpc host (e.g. /etc/frpc.toml), then:
+#   systemctl enable --now frpc    # if you used the example systemd unit
+#   # OR directly:
+#   frpc -c /etc/frpc.toml
+#
+# IMPORTANT:
+#   * serverAddr / serverPort / auth.token come from your admin — do not change
+#     unless the admin told you to.
+#   * All clients use the SAME shared token; frpc identifies itself via `user`.
+#   * Append your own [[proxies]] blocks below this line to expose local services.
+
+serverAddr = "{{ server_addr }}"
+serverPort = {{ bind_port }}
+
+[auth]
+method = "token"
+token = "{{ server_token }}"
+
+# Optional transport defaults (uncomment if you want them)
+# transport.useEncryption = true
+# transport.useCompression = true
+
+[webServer]
+addr = "127.0.0.1"
+port = 7400
+user = "admin"
+password = "admin"
+
+# ---------------------------------------------------------------
+# Add your proxies below. Examples:
+#
+# [[proxies]]
+# name = "ssh"
+# type = "tcp"
+# localIP = "127.0.0.1"
+# localPort = 22
+# remotePort = 6000
+#
+# [[proxies]]
+# name = "web"
+# type = "http"
+# localIP = "127.0.0.1"
+# localPort = 8080
+# customDomains = ["your.domain.example.com"]
+# ---------------------------------------------------------------