Fix Emoji picker focus (#7217)

* Only portal the emoji picker where needed

* Add optional portal prop to emoji picker

* Use FocusScope to our advantage

* Pare back, add guards, fix focus trap

* Don't return focus to emoji button

* Set DM input position on emoji insert

* Let the caller determine next focus node

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Co-authored-by: Dan Abramov <dan.abramov@gmail.com>

src/state/shell/composer/index.tsx

@@ -13,6 +13,7 @@ import {useNonReactiveCallback} from '#/lib/hooks/useNonReactiveCallback'
 import {postUriToRelativePath, toBskyAppUrl} from '#/lib/strings/url-helpers'
 import {purgeTemporaryImageFiles} from '#/state/gallery'
 import {precacheResolveLinkQuery} from '#/state/queries/resolve-link'
+import type {EmojiPickerPosition} from '#/view/com/composer/text-input/web/EmojiPicker.web'
 import * as Toast from '#/view/com/util/Toast'
 
 export interface ComposerOptsPostRef {
@@ -29,7 +30,7 @@ export interface ComposerOpts {
   onPost?: (postUri: string | undefined) => void
   quote?: AppBskyFeedDefs.PostView
   mention?: string // handle of user to mention
-  openEmojiPicker?: (pos: DOMRect | undefined) => void
+  openEmojiPicker?: (pos: EmojiPickerPosition | undefined) => void
   text?: string
   imageUris?: {uri: string; width: number; height: number; altText?: string}[]
   videoUri?: {uri: string; width: number; height: number}