refactor(models): bump claude-opus-4-6 to claude-opus-4-7 across fallback chains, categories, and hooks

Updates the canonical Anthropic Opus model in every fallback chain
(sisyphus, oracle, prometheus, metis, momus, visual-engineering,
ultrabrain, deep, artistry, unspecified-high), the unspecified-high
category default, the think-mode HIGH_VARIANT_MAP, the Claude Code
alias map, the claude-thinking legacy alias, the context-limit GA
regex, and event.ts fallback strings.

Widens supportsCachedAnthropicLimit to accept both claude-*-4-6 and
claude-*-4-7 so the 1M context cache still applies across the bump.

Regenerates the bundled model-capabilities snapshot from models.dev
and the model-fallback snapshot to match the new source output.

src/cli/tui-install-prompts.ts

@@ -74,7 +74,7 @@ export async function promptInstallConfig(detected: DetectedConfig): Promise<Ins
     message: "Do you have access to OpenCode Zen (opencode/ models)?",
     options: [
       { value: "no", label: "No", hint: "Will use other configured providers" },
-      { value: "yes", label: "Yes", hint: "opencode/claude-opus-4-6, opencode/gpt-5.4, etc." },
+      { value: "yes", label: "Yes", hint: "opencode/claude-opus-4-7, opencode/gpt-5.4, etc." },
     ],
     initialValue: initial.opencodeZen,
   })