feat(model-settings-compat): add variant/reasoningEffort compatibility resolver

- Registry-based model family detection (provider-agnostic)
- Variant and reasoningEffort ladder downgrade logic
- Three-tier resolution: metadata override → family heuristic → unknown drop
- Comprehensive test suite covering all model families

src/hooks/anthropic-effort/hook.ts

@@ -1,6 +1,6 @@
 import { log, normalizeModelID } from "../../shared"
 
-const OPUS_PATTERN = /claude-opus/i
+const OPUS_PATTERN = /claude-.*opus/i
 
 function isClaudeProvider(providerID: string, modelID: string): boolean {
   if (["anthropic", "google-vertex-anthropic", "opencode"].includes(providerID)) return true