Address the estate at /v1, not /api/v1

Two defaults carried an /api/ prefix this estate does not serve: the commerce
base and the DNS endpoint.

Neither resource answers at either spelling today — api.hanzo.ai serves commerce
carts under /v1/commerce and none of the products or orders this tool asks for,
and dns.hanzo.ai answers nothing at all. The prefix is the part that was wrong
either way; what those tools reach is a separate question.

pkg/hanzo-tools-commerce/hanzo_tools/commerce/commerce_tool.py

@@ -1,6 +1,6 @@
 """MCP tool for Hanzo Commerce -- orders, products, collections, stores.
 
-Wraps the Hanzo Commerce API at api.hanzo.ai/api/v1/.
+Wraps the Hanzo Commerce API at api.hanzo.ai/v1/.
 Auth: Uses HanzoSession from hanzo-tools-auth for bearer tokens.
 """
 
@@ -36,7 +36,7 @@ Actions:
 - webhooks: List configured webhooks
 """
 
-API_BASE = "https://api.hanzo.ai/api/v1"
+API_BASE = "https://api.hanzo.ai/v1"
 
 
 def _get_session():

pkg/hanzo/src/hanzo/commands/dns/coredns.py

@@ -1,7 +1,7 @@
 """CoreDNS (Hanzo DNS) provider.
 
 Manages DNS via Hanzo's CoreDNS API (K8s-native DNS for Hanzo infrastructure).
-Endpoint: configurable, defaults to https://dns.hanzo.ai/api/v1
+Endpoint: configurable, defaults to https://dns.hanzo.ai/v1
 """
 
 from __future__ import annotations
@@ -12,7 +12,7 @@ import click
 
 from .provider import DNSZone, DNSRecord, DNSProvider, register_provider
 
-DEFAULT_ENDPOINT = "https://dns.hanzo.ai/api/v1"
+DEFAULT_ENDPOINT = "https://dns.hanzo.ai/v1"
 
 
 class CoreDNSProvider(DNSProvider):