fix(models): support DeepSeek V4.1 vision and max effort

Refresh the generated capability catalog from command-code@1.44.0 to
1.53.1. deepseek/deepseek-v4.1-flash now advertises image input and its
low, high, and max reasoning efforts, so pi forwards attached images and
exposes the full thinking-level selector instead of reporting the model
as text-only without selectable levels. The sync also adds gpt-6-astra,
xai/grok-4.6, and inclusionai/ling-3.0-flash-sante:free metadata.

Drop the now-obsolete manual Meta Muse Spark effort overrides because
upstream publishes efforts for meta/muse-spark-1.1 through 1.3-contributor
and MiniMaxAI/MiniMax-M3, and add a regression test for the V4.1
capabilities.

tests/test-models.ts

@@ -126,6 +126,22 @@ describe("commandCodeModelsFromApiResponse()", () => {
     assert.equal(modelSupportsImageInput("unknown-new-model"), false)
   })
 
+  it("exposes DeepSeek V4.1 vision input and its low/high/max thinking levels", () => {
+    const modelId = "deepseek/deepseek-v4.1-flash"
+    assert.deepEqual(inputModalitiesForModel(modelId), ["text", "image"])
+    assert.equal(modelSupportsImageInput(modelId), true)
+    assert.equal(MODEL_REASONING[modelId], true)
+    assert.deepEqual(MODEL_EFFORTS[modelId], ["low", "high", "max"])
+    assert.deepEqual(thinkingMetadataForModel(modelId)?.thinkingLevelMap, {
+      minimal: null,
+      low: "low",
+      medium: null,
+      high: "high",
+      xhigh: null,
+      max: "max",
+    })
+  })
+
   it("tracks reasoning independently from selectable effort levels", () => {
     const reasoningModels = Object.keys(MODEL_REASONING)
     const effortModels = Object.keys(MODEL_EFFORTS)
@@ -198,7 +214,6 @@ describe("commandCodeModelsFromApiResponse()", () => {
 
   it("merges manual effort overrides over the generated catalog", () => {
     const validEfforts = new Set(["minimal", "low", "medium", "high", "xhigh", "max"])
-    assert.ok(Object.keys(MODEL_EFFORT_OVERRIDES).length > 0)
     for (const [modelId, efforts] of Object.entries(MODEL_EFFORT_OVERRIDES)) {
       assert.equal(MODEL_REASONING[modelId], true, `${modelId} override needs a reasoning flag`)
       assert.equal(