v3 M3: z.ai (GLM) provider — Anthropic-compatible poll from a pasted API key

ZaiProvider replaces the zai stub. It reaches z.ai's Anthropic-compatible
endpoint (default https://api.z.ai/api/anthropic) exactly like Claude Code with
ANTHROPIC_BASE_URL pointed at z.ai: a /v1/messages POST with a Bearer key. The
key + base URL come from the config the control panel's z.ai field writes
(providers.zai.base_url/.api_key) — no OAuth, no local files.

Two z.ai-specific cares: (1) static API key, no self-refresh; (2) the GLM Coding
Plan meters by prompts, so a 60s poll would drain quota — the provider
self-throttles to one network call per poll_interval_s (default 15 min) and
serves a cached status in between. Rate-limit parsing assumes z.ai proxies
Anthropic's unified headers (5h->s/sr, 7d->w/wr); if a real response lacks them
it still reports connected and logs the limit-ish headers it did return, so the
mapping can be finalized against a live key.

tools/probe_zai.py dumps a real z.ai response's headers (key via env, never
printed) to pin the exact header names. Graceful without a key: selecting z.ai
shows the blue theme + "no key", never crashes the loop. Registry: all three
providers now real; unknown ids fall back to StubProvider. +7 z.ai tests (mocked
transport: header mapping, auth, throttle, fallback); 120 passed, 2 Linux-only.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

daemon/tests/test_providers.py

@@ -10,7 +10,8 @@ import json
 
 from daemon import config
 from daemon.providers import (
-    get_provider, AnthropicProvider, OpenAICodexProvider, StubProvider, ProviderStatus)
+    get_provider, AnthropicProvider, OpenAICodexProvider, ZaiProvider,
+    StubProvider, ProviderStatus)
 
 
 def _run(coro):
@@ -70,17 +71,19 @@ def test_registry_types():
     a = get_provider("anthropic")
     assert isinstance(a, AnthropicProvider) and a.id == "anthropic"
     o = get_provider("openai")
-    assert isinstance(o, OpenAICodexProvider)
-    assert o.id == "openai" and o.accent == "10a37f"
-    stub = get_provider("zai")          # z.ai is still a stub until M3
-    assert isinstance(stub, StubProvider)
-    assert stub.id == "zai" and stub.accent == "3859ff"
+    assert isinstance(o, OpenAICodexProvider) and o.id == "openai" and o.accent == "10a37f"
+    z = get_provider("zai")
+    assert isinstance(z, ZaiProvider) and z.id == "zai" and z.accent == "3859ff"
+    stub = get_provider("mystery")      # unknown id → safe placeholder, never crashes
+    assert isinstance(stub, StubProvider) and stub.id == "mystery"
 
 
-def test_stub_provider_poll_is_safe():
+def test_zai_poll_without_key_is_safe(tmp_path, monkeypatch):
+    # No api_key configured => "no key", no network call.
+    _write(tmp_path, monkeypatch, {"version": 2, "providers": {"zai": {"enabled": True}}})
     st = _run(get_provider("zai").poll())
     assert isinstance(st, ProviderStatus)
-    assert st.ok is False
+    assert st.ok is False and st.st == "no key"
 
 
 def test_provider_status_payload_keys():