ooo/forward plugin

DMS/docker-data/roundcube/plugins/email_config/composer.json

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+{
+    "name": "local/email_config",
+    "type": "roundcube-plugin",
+    "description": "Email Configuration Plugin - Opens external email config interface",
+    "license": "MIT",
+    "version": "1.0.0",
+    "authors": [
+        {
+            "name": "Custom Plugin",
+            "role": "Developer"
+        }
+    ],
+    "require": {
+        "php": ">=7.0.0",
+        "roundcube/plugin-installer": ">=0.1.3"
+    }
+}

DMS/docker-data/roundcube/plugins/email_config/email_config.js

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+/**
+ * Email Configuration Plugin - Client Side
+ */
+if (window.rcmail) {
+    rcmail.addEventListener('init', function(evt) {
+        rcmail.register_command('email_config_open', function() {
+            rcmail.http_post('plugin.email_config_generate_url', {},
+                rcmail.set_busy(true, 'loading'));
+        }, true);
+    });
+
+    rcmail.addEventListener('responseafterplugin.email_config_generate_url', function(response) {
+        rcmail.set_busy(false);
+        if (response && response.url) {
+            window.open(response.url, '_blank');
+        } else {
+            rcmail.display_message('Failed to generate configuration URL', 'error');
+        }
+    });
+}

DMS/docker-data/roundcube/plugins/email_config/email_config.php

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+<?php
+/**
+ * Email Configuration Plugin
+ * Opens external email config interface with signed authentication
+ */
+class email_config extends rcube_plugin
+{
+    public $task = 'settings|mail';
+    private $secret_key = 'SHARED_SECRET_KEY_987654321';
+    private $config_url = 'http://localhost:3009';
+
+    function init()
+    {
+        // Register actions
+        $this->register_action('plugin.email_config', array($this, 'email_config_init'));
+        $this->register_action('plugin.email_config_generate_url', array($this, 'generate_signed_url'));
+
+        // Add button to toolbar in mail view
+        if ($this->rcmail->task == 'mail') {
+            $this->add_button(array(
+                'command'    => 'email_config_open',
+                'label'      => 'Email Config',
+                'title'      => 'Configure auto-reply and forwarding',
+                'type'       => 'link',
+                'class'      => 'button email-config',
+            ), 'toolbar');
+
+            $this->include_script('email_config.js');
+        }
+
+        // Add to settings menu
+        if ($this->rcmail->task == 'settings') {
+            $this->add_hook('settings_actions', array($this, 'settings_actions'));
+        }
+    }
+
+    function settings_actions($args)
+    {
+        $args['actions'][] = array(
+            'action' => 'plugin.email_config',
+            'class'  => 'email-config',
+            'label'  => 'Email Configuration',
+            'title'  => 'Configure email rules',
+        );
+        return $args;
+    }
+
+    function email_config_init()
+    {
+        $this->register_handler('plugin.body', array($this, 'email_config_form'));
+        $this->rcmail->output->set_pagetitle('Email Configuration');
+        $this->rcmail->output->send('plugin');
+    }
+
+    function email_config_form()
+    {
+        $email = $this->rcmail->user->get_username();
+        $url = $this->generate_url($email);
+
+        $out = html::div(array('class' => 'box'),
+            html::p(null, 'Manage your email configuration including out-of-office auto-replies and forwarding rules.') .
+            html::p(null,
+                html::a(array(
+                    'href' => $url,
+                    'target' => '_blank',
+                    'class' => 'button mainaction',
+                ), 'Open Email Configuration')
+            )
+        );
+
+        return $out;
+    }
+
+    function generate_signed_url()
+    {
+        $email = $this->rcmail->user->get_username();
+        $url = $this->generate_url($email);
+
+        header('Content-Type: application/json');
+        echo json_encode(array('success' => true, 'url' => $url));
+        exit;
+    }
+
+    private function generate_url($email)
+    {
+        $expires = time() + 3600; // 1 hour validity
+        $data = $email . '|' . $expires;
+        $signature = hash_hmac('sha256', $data, $this->secret_key);
+
+        return $this->config_url . '/?email=' . urlencode($email)
+             . '&expires=' . $expires
+             . '&signature=' . $signature;
+    }
+}