fix: self-heal legacy untagged ccstatusline hooks on sync

[bit-saver]

Problem

stripManagedHooks removes only entries tagged ccstatusline-managed. Untagged hooks — written by pre-tag versions, an npx-vs-global-binary command variant, settings synced from another machine, or a manual edit — are invisible to it. So every syncWidgetHooks leaves them in place and adds a fresh managed copy beside them: ccstatusline hooks accumulate in ~/.claude/settings.json, and saving from the configurator never converges.

Fix

stripManagedHooks now also drops untagged entries whose hook command matches the ccstatusline --hook invocation (/ccstatusline.* --hook(?:\s|$)/), then re-adds the deduped managed set as before. Hook sync becomes idempotent even for legacy installs — it migrates old/untagged hooks into the managed set automatically. Non-ccstatusline user hooks are untouched.

The match requires a space before --hook and a trailing word boundary so it can't catch unrelated --hook* substrings.

Tests

Adds vitest cases to src/utils/__tests__/hooks.test.ts (real temp CLAUDE_CONFIG_DIR, no mocks):

• legacy untagged ccstatusline hooks heal to a single managed hook per event (no duplication), while a non-ccstatusline user hook is preserved;
• repeated syncs starting from a legacy state stay at one managed hook per event (idempotent).

bun run lint passes clean; the hooks suite passes.