feat: add Claude Opus 4.6 to built-in model catalog (#9853)

* feat: add Claude Opus 4.6 to built-in model catalog

- Update default model from claude-opus-4-5 to claude-opus-4-6
- Add opus-4.6 model ID normalization
- Add claude-opus-4-6 to live model filter prefixes
- Update image tool to prefer claude-opus-4-6 for vision
- Add CLI backend alias for opus-4.6
- Update onboard auth default selections to include opus-4.6
- Update model picker placeholder

Closes #9811

* test: update tests for claude-opus-4-6 default

- Fix model-alias-defaults test to use claude-opus-4-6
- Fix image-tool test to expect claude-opus-4-6 in fallbacks

* feat: support claude-opus-4-6

* docs: update changelog for opus 4.6 (#9853) (thanks @TinyTb)

* chore: bump pi to 0.52.0

---------

Co-authored-by: Slurpy <slurpy@openclaw.ai>
Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/commands/configure.gateway-auth.ts

@@ -15,6 +15,7 @@ import {
 type GatewayAuthChoice = "token" | "password";
 
 const ANTHROPIC_OAUTH_MODEL_KEYS = [
+  "anthropic/claude-opus-4-6",
   "anthropic/claude-opus-4-5",
   "anthropic/claude-sonnet-4-5",
   "anthropic/claude-haiku-4-5",
@@ -81,7 +82,7 @@ export async function promptAuthConfig(
     config: next,
     prompter,
     allowedKeys: anthropicOAuth ? ANTHROPIC_OAUTH_MODEL_KEYS : undefined,
-    initialSelections: anthropicOAuth ? ["anthropic/claude-opus-4-5"] : undefined,
+    initialSelections: anthropicOAuth ? ["anthropic/claude-opus-4-6"] : undefined,
     message: anthropicOAuth ? "Anthropic OAuth models" : undefined,
   });
   if (allowlistSelection.models) {