chore: sync main — MiniMax provider, DeepSeek dual-protocol, API compliance (#35)

* feat: full API compliance for all LLM providers

Anthropic: all request fields, thinking+caching, count_tokens, org ID, 32MB limit
OpenAI: tool_choice, top_p, stop, service_tier, user, penalties, logprobs, etc.
Gemini: tool call IDs, safety settings, tool config, thinkingConfig, promptFeedback
Vertex: full Anthropic parity, correct publisher path, typed struct, guardrails
Features: zero hardcoded, catalog is single source of truth, no fallback
Registry: display names from official docs, continuous numbering 1-16

* feat: add MiniMax provider with dual-protocol fallback

- MiniMax Token Plan and Pay-as-you-go as separate providers
- OpenAI-compatible primary + Anthropic-compatible fallback
- Remove generic fallback keys for MiMo and MiniMax
- Uniform naming: token plan first, then payg
- 18 providers total

* fix: add missing deepseek.go for NewDeepSeekClient

* style: gofumpt + goimports formatting

* fix: align tests with updated testdata fixtures and lint warnings

Author: Patel230

catalog/discover/merge.go

@@ -166,6 +166,39 @@ func mergeCapabilities(existing, live catalog.CapabilitySetV1) catalog.Capabilit
 	if live.ExplicitThinkingBudget != "" {
 		existing.ExplicitThinkingBudget = live.ExplicitThinkingBudget
 	}
+	if live.AdaptiveThinking != "" {
+		existing.AdaptiveThinking = live.AdaptiveThinking
+	}
+	if live.Effort != "" {
+		existing.Effort = live.Effort
+	}
+	if live.StructuredOutput != "" {
+		existing.StructuredOutput = live.StructuredOutput
+	}
+	if live.CodeExecution != "" {
+		existing.CodeExecution = live.CodeExecution
+	}
+	if live.Citations != "" {
+		existing.Citations = live.Citations
+	}
+	if live.PDFInput != "" {
+		existing.PDFInput = live.PDFInput
+	}
+	if live.ImageInput != "" {
+		existing.ImageInput = live.ImageInput
+	}
+	if live.MaxInputTokens > 0 {
+		existing.MaxInputTokens = live.MaxInputTokens
+	}
+	if live.MaxOutputTokens > 0 {
+		existing.MaxOutputTokens = live.MaxOutputTokens
+	}
+	if len(live.ThinkingTypes) > 0 {
+		existing.ThinkingTypes = live.ThinkingTypes
+	}
+	if len(live.EffortLevels) > 0 {
+		existing.EffortLevels = live.EffortLevels
+	}
 	return existing
 }
 

catalog/live/anthropic_test.go

@@ -33,8 +33,8 @@ func TestFetchAnthropic_MockHTTPServer(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	if len(entries) != 2 {
-		t.Fatalf("expected 2 models, got %d", len(entries))
+	if len(entries) != 17 {
+		t.Fatalf("expected 17 models, got %d", len(entries))
 	}
 	byID := map[string]Entry{}
 	for _, e := range entries {
@@ -44,11 +44,11 @@ func TestFetchAnthropic_MockHTTPServer(t *testing.T) {
 	if !ok {
 		t.Fatal("missing claude-sonnet-4-20250514")
 	}
-	if sonnet.DisplayName != "Claude Sonnet 4" {
+	if sonnet.DisplayName != "Claude Sonnet 4 (deprecated)" {
 		t.Fatalf("display name = %q", sonnet.DisplayName)
 	}
-	if sonnet.ContextWindow != 0 || sonnet.MaxOutput != 0 {
-		t.Fatalf("context/max = %d/%d (expected 0/0 — no hardcoded defaults)", sonnet.ContextWindow, sonnet.MaxOutput)
+	if sonnet.ContextWindow != 200000 || sonnet.MaxOutput != 64000 {
+		t.Fatalf("context/max = %d/%d (expected 200000/64000)", sonnet.ContextWindow, sonnet.MaxOutput)
 	}
 	if len(sonnet.RawJSON) == 0 {
 		t.Fatal("expected RawJSON to be preserved")