fix: simplify 1M context locale copy for Claude 4 models (#11514)

Update 1M context locale copy for Claude 4 models

Refresh 1M context beta descriptions so locale text matches
current model support in Anthropic, Bedrock, and Vertex.

Use a shorter model scope string to keep UI copy readable and
easier to maintain while staying accurate.

Author: PeterDaveHello

webview-ui/src/i18n/locales/ca/settings.json

@@ -429,11 +429,11 @@
 		"getAnthropicApiKey": "Get Anthropic API Key",
 		"anthropicUseAuthToken": "Pass Anthropic API Key as Authorization header instead of X-Api-Key",
 		"anthropic1MContextBetaLabel": "Enable 1M context window (Beta)",
-		"anthropic1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4",
+		"anthropic1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4.x / Claude Opus 4.6",
 		"awsBedrock1MContextBetaLabel": "Enable 1M context window (Beta)",
-		"awsBedrock1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4",
+		"awsBedrock1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4.x / Claude Opus 4.6",
 		"vertex1MContextBetaLabel": "Enable 1M context window (Beta)",
-		"vertex1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4",
+		"vertex1MContextBetaDescription": "Extends context window to 1 million tokens for Claude Sonnet 4.x / Claude Opus 4.6",
 		"basetenApiKey": "Baseten API Key",
 		"getBasetenApiKey": "Get Baseten API Key",
 		"fireworksApiKey": "Fireworks API Key",