collapse the dual-world type layer and delete the widening shims

The types/bsky post/profile/starterPack unions drop their @atproto/api arms,
and dangerousIsType/validate go with the old-world guards they wrapped. The
moderation subjects.ts widening shim and rich-text-helpers' asSdkFacets both
existed only to bridge branded and unbranded views, so their 55 and 14 callers
now go straight to @bsky.app/sdk/moderation and the raw facets.

Boundary fallout: lexicon token defs are camelCase schema objects needing
.value, and the branded string slots that the widening used to absorb are now
cast or branded at their producers.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/view/com/post-thread/PostQuotes.tsx

@@ -1,12 +1,11 @@
 import {useCallback, useState} from 'react'
-import {type ModerationDecision} from '@bsky.app/sdk/moderation'
+import {moderatePost, type ModerationDecision} from '@bsky.app/sdk/moderation'
 import {msg} from '@lingui/core/macro'
 import {useLingui} from '@lingui/react'
 
 import {app} from '#/lexicons'
 import {useInitialNumToRender} from '#/lib/hooks/useInitialNumToRender'
 import {usePostViewTracking} from '#/lib/hooks/usePostViewTracking'
-import {moderatePost} from '#/lib/moderation/subjects'
 import {cleanError} from '#/lib/strings/errors'
 import {logger} from '#/logger'
 import {useModerationOpts} from '#/state/preferences/moderation-opts'