fix: address PR review feedback and fix CI test failures

- Revert default transport to streamable-http (not a breaking change)
- Extract AVAILABLE_APPS constant to server/__init__.py (DRY)
- Wrap get_stdio_mcp ValueError in click.ClickException for clean errors
- Fix test_stdio.py: call _reload_config() so dynaconf sees env changes
- Use lazy %-style logging in stdio.py
- Add private API comments in test assertions
- Derive --enable-app CLI choices from AVAILABLE_APPS
- README: show explicit --transport stdio in uvx examples

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

nextcloud_mcp_server/stdio.py

@@ -11,7 +11,6 @@ import logging
 from collections.abc import AsyncIterator
 from contextlib import asynccontextmanager
 from dataclasses import dataclass
-from typing import Callable
 
 from mcp.server.fastmcp import Context, FastMCP
 
@@ -19,18 +18,7 @@ from nextcloud_mcp_server.client import NextcloudClient
 from nextcloud_mcp_server.config import get_settings
 from nextcloud_mcp_server.config_validators import AuthMode, validate_configuration
 from nextcloud_mcp_server.context import get_client as get_nextcloud_client
-from nextcloud_mcp_server.server import (
-    configure_calendar_tools,
-    configure_collectives_tools,
-    configure_contacts_tools,
-    configure_cookbook_tools,
-    configure_deck_tools,
-    configure_news_tools,
-    configure_notes_tools,
-    configure_sharing_tools,
-    configure_tables_tools,
-    configure_webdav_tools,
-)
+from nextcloud_mcp_server.server import AVAILABLE_APPS
 
 logger = logging.getLogger(__name__)
 
@@ -99,30 +87,18 @@ def get_stdio_mcp(enabled_apps: list[str] | None = None) -> FastMCP:
         return await client.capabilities()
 
     # --- tool registration ---
-    available_apps: dict[str, Callable] = {
-        "notes": configure_notes_tools,
-        "tables": configure_tables_tools,
-        "webdav": configure_webdav_tools,
-        "sharing": configure_sharing_tools,
-        "calendar": configure_calendar_tools,
-        "collectives": configure_collectives_tools,
-        "contacts": configure_contacts_tools,
-        "cookbook": configure_cookbook_tools,
-        "deck": configure_deck_tools,
-        "news": configure_news_tools,
-    }
-
     if enabled_apps is None:
-        enabled_apps = list(available_apps.keys())
+        enabled_apps = list(AVAILABLE_APPS.keys())
 
     for app_name in enabled_apps:
-        if app_name in available_apps:
-            logger.info(f"Configuring {app_name} tools")
-            available_apps[app_name](mcp)
+        if app_name in AVAILABLE_APPS:
+            logger.info("Configuring %s tools", app_name)
+            AVAILABLE_APPS[app_name](mcp)
         else:
             logger.warning(
-                f"Unknown app: {app_name}. "
-                f"Available apps: {list(available_apps.keys())}"
+                "Unknown app: %s. Available apps: %s",
+                app_name,
+                list(AVAILABLE_APPS.keys()),
             )
 
     return mcp