fix(gateway): remove no-verify SSL context from proxy (#7)

All internal services use plain HTTP (Docker network). The
_internal_ssl_ctx with disabled cert verification was a no-op
for HTTP URLs but suggested TLS bypass was in use.

- Removed _internal_ssl_ctx from config.py
- Removed ssl import from config.py
- proxy.py now calls urlopen() without context parameter
- External calls (OpenAI, SMTP2GO, Open Library) already use
  default TLS verification

Verified: dashboard, trips, fitness, budget, inventory all respond correctly.

gateway/config.py

@@ -3,7 +3,6 @@ Platform Gateway — Configuration constants and environment variables.
 """
 
 import os
-import ssl
 from pathlib import Path
 
 # ── Server ──
@@ -62,9 +61,7 @@ SESSION_MAX_AGE = int(os.environ.get("SESSION_MAX_AGE", 30 * 86400))  # 30 days
 # ── Ensure data dir exists ──
 DATA_DIR.mkdir(parents=True, exist_ok=True)
 
-# ── SSL contexts ──
-# Internal: skip verification for Docker-internal services (no valid certs)
-_internal_ssl_ctx = ssl.create_default_context()
-_internal_ssl_ctx.check_hostname = False
-_internal_ssl_ctx.verify_mode = ssl.CERT_NONE
+# Note: All internal services use plain HTTP (Docker network).
+# No custom SSL context needed. External calls (OpenAI, SMTP2GO, Open Library)
+# use default TLS verification.
 

gateway/proxy.py

@@ -6,18 +6,19 @@ import json
 import urllib.request
 import urllib.error
 
-from config import _internal_ssl_ctx
 from database import get_db
 
 
 def proxy_request(target_url, method, headers, body=None, timeout=120):
-    """Proxy a request to a backend service. Returns (status, response_headers, response_body)."""
+    """Proxy a request to a backend service. Returns (status, response_headers, response_body).
+    All internal services use plain HTTP (Docker network) — no SSL context needed.
+    """
     try:
         req = urllib.request.Request(target_url, data=body, method=method)
         for k, v in headers.items():
             req.add_header(k, v)
 
-        with urllib.request.urlopen(req, context=_internal_ssl_ctx, timeout=timeout) as resp:
+        with urllib.request.urlopen(req, timeout=timeout) as resp:
             resp_body = resp.read()
             resp_headers = dict(resp.headers)
             return resp.status, resp_headers, resp_body