feat(models): deepseek-v4.* accepts low..max effort; flag thinkingEffortSupported and vision

open-sse/providers/thinkingLevels.js

@@ -41,6 +41,10 @@ const PATTERN_THINKING = [
   { provider: "codex", pattern: "*gpt-5.6-terra*", levels: [...CODEX_GPT_5_6_LEVELS, "ultra"] },
   { provider: "codex", pattern: "*gpt-5.6-luna*", levels: CODEX_GPT_5_6_LEVELS },
   { pattern: "*codex*", levels: ["low", "medium", "high", "xhigh"] }, // codex cannot disable thinking
+  // DeepSeek v4.* (Alibaba MaaS, probed live): effort low|medium|high|xhigh|max
+  // all 200 via output_config.effort; "none" is a 400 on the anthropic route
+  // (disable thinking instead). none kept for the picker = disable.
+  { pattern: "*deepseek-v4.*", levels: ["none", "low", "medium", "high", "xhigh", "max"] },
   // codebuddy-cn per-model effort sets — the server's product-config payload
   // publishes `reasoning.supportedEfforts` per model. NOTE: the chat endpoint
   // accepts any level you send (probed none/minimal/low/medium/high/xhigh/max