Stabilize local dev merge

Align regression tests with the current Odysseus behavior after merging origin/dev into local main.

- keep phone/name-only contacts valid and cover null email without crashes

- pin explicit web-search false form submission in chat.js

- update Cookbook dependency/download completion tests for combined live + persisted output

- expose SGLang OS package repair hints from backend diagnosis

- treat MLX and MLX-community repos as servable on Apple Metal while keeping CUDA behavior unchanged

- keep desktop new-chat coverage on the shared preferred-model helper

- remove a hardcoded crop overlay portal z-index literal

- include the local agent-loop cleanup that removes the old manage_notes reminder repair shim

Verified with: docker run --rm -v /home/pewds/odysseus-cookbook-fresh:/app -w /app odysseus-cookbook-fresh-odysseus python3 -m pytest -q (4515 passed, 4 skipped).

tests/test_chat_route_tool_policy.py

@@ -254,6 +254,6 @@ def test_frontend_always_sends_explicit_allow_bash():
 def test_frontend_sends_explicit_allow_web_search_false_in_agent_mode():
     """chat.js must send allow_web_search=false when web toggle is off in agent mode."""
     source = _CHAT_JS.read_text(encoding="utf-8")
-    assert "allow_web_search', 'false'" in source, (
+    assert "fd.append('allow_web_search', el('web-toggle').checked ? 'true' : 'false')" in source, (
         "Frontend must send explicit allow_web_search=false in agent mode when toggle is off"
     )