feat: install order, dependency blocking, batch install

- Sort extensions by install order (HebrewLanguage first, then deps)
- Grey out extensions with missing dependencies (show lock icon + "נדרש: X")
- Checkbox selection for batch install with progress indicator
- "בחר הכל" button to select all installable extensions
- Server returns dependencies + install_order in customer API

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

server.py

@@ -53,6 +53,39 @@ MODULES = {
     "SmsIntegration": "sms-integration", "WhatsAppIntegration": "whatsapp-integration",
 }
 
+# Extension dependency tree and install order
+DEPENDENCIES = {
+    'HebrewLanguage': [],
+    'KlearBranding': ['HebrewLanguage'],
+    'PhoneIsraelFormat': ['HebrewLanguage'],
+    'EmailDefaults': ['HebrewLanguage'],
+    'MpdfEngine': ['HebrewLanguage'],
+    'LicenseManager': ['HebrewLanguage'],
+    'LocalDocuments': ['HebrewLanguage'],
+    'GoogleIntegration': ['HebrewLanguage'],
+    'NextCloudIntegration': ['HebrewLanguage'],
+    'NetworkStorageIntegration': ['HebrewLanguage'],
+    'SmsIntegration': ['HebrewLanguage'],
+    'WhatsAppIntegration': ['HebrewLanguage'],
+    'GreenInvoiceBilling': ['HebrewLanguage'],
+    'CrmAssistant': ['HebrewLanguage'],
+    'OfficeAssistant': ['HebrewLanguage'],
+    'LegalCrm': ['HebrewLanguage'],
+    'NetHamishpat': ['HebrewLanguage', 'LegalCrm'],
+    'DigitalSignature': ['HebrewLanguage', 'LegalCrm'],
+    'SmartAssistant': ['HebrewLanguage', 'LegalCrm'],
+}
+
+INSTALL_ORDER = [
+    'HebrewLanguage',
+    'KlearBranding', 'PhoneIsraelFormat', 'EmailDefaults', 'MpdfEngine',
+    'LicenseManager', 'LocalDocuments', 'GoogleIntegration',
+    'NextCloudIntegration', 'NetworkStorageIntegration',
+    'SmsIntegration', 'WhatsAppIntegration', 'GreenInvoiceBilling',
+    'CrmAssistant', 'OfficeAssistant', 'LegalCrm',
+    'NetHamishpat', 'DigitalSignature', 'SmartAssistant',
+]
+
 SSL_CTX = ssl.create_default_context()
 SSL_CTX.check_hostname = False
 SSL_CTX.verify_mode = ssl.CERT_NONE
@@ -406,6 +439,8 @@ class APIHandler(BaseHTTPRequestHandler):
         customer['extensions'] = query("""
             SELECT e.id, e.name, e.composer_name, e.latest_version, ce.installed_version, ce.license_status, ce.auto_update, ce.installed_at
             FROM customer_extensions ce JOIN extensions e ON ce.extension_id = e.id WHERE ce.customer_id = %s ORDER BY e.name""", (cid,))
+        customer['dependencies'] = DEPENDENCIES
+        customer['install_order'] = INSTALL_ORDER
         self._respond(200, customer)
 
     def _create_customer(self, body):