feat(configure): hide Codex and OpenCode from the install/config TUI

[quickbeard]

What

Temporarily hides the Codex and OpenCode rows from the interactive agent picker in codevhub install and codevhub config. This is a user-facing hide only — all the underlying logic stays fully wired so the two can be surfaced again later.

How

src/components/ToolSelect.tsx is the single selection surface both commands share (both route through SetupApp → ToolSelect). The two entries are marked hidden: true, and rendering/navigation now run over a derived VISIBLE_TOOLS list:

{ label: "Codex", value: "codex", hidden: true },
{ label: "OpenCode", value: "opencode", hidden: true },
...
const VISIBLE_TOOLS = TOOLS.filter((t) => !t.hidden);

Re-surfacing later is a one-line change: drop the hidden flags.

What stays intact

Nothing downstream changed — the Tool union, configureCodex / configureOpenCode, providers, detectConfiguredTools, restore, codevhub update, and the passthrough launch commands (codevhub codex, codevhub opencode) all continue to work.

• codevhub model only lists already-configured tools, so hiding at install/config keeps them out naturally.
• codevhub update only refreshes packages already on disk (no user-facing menu).

Note: users who already configured Codex/OpenCode in a prior run will still see them in codevhub model and still get them updated by codevhub update, which matches the "keep everything in touch" intent.

Tests

• Fixed the extension-row navigation counts (rows shift up two positions with Codex/OpenCode gone).
• Added a test asserting Codex/OpenCode no longer render.
• Parked the two Codex-selection integration tests with test.skip (+ comment) since they drive a now-unreachable UI path — un-skip when the rows return.

All checks pass: pnpm fix, pnpm typecheck, pnpm test (1254 passed, 2 skipped), pnpm build && node dist/index.js --version.

🤖 Generated with Claude Code