[Drafts] Storage fixes (#9790)

* delete media from existsCache when deleting

* revoke media URLs

* skip revoking objecturls until the composer is completely closed

* [Drafts] Metrics (#9794)

* metrics for drafts

* Nit: format

* nit: use new util for clarity

* nit: use new util for clarity

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Co-authored-by: Eric Bailey <git@esb.lol>

---------

Co-authored-by: Eric Bailey <git@esb.lol>

src/state/shell/composer/index.tsx

@@ -33,6 +33,14 @@ export type OnPostSuccessData =
     }
   | undefined
 
+export type ComposerLogContext =
+  | 'Fab'
+  | 'PostReply'
+  | 'QuotePost'
+  | 'ProfileFeed'
+  | 'Deeplink'
+  | 'Other'
+
 export interface ComposerOpts {
   replyTo?: ComposerOptsPostRef
   onPost?: (postUri: string | undefined) => void
@@ -44,6 +52,7 @@ export interface ComposerOpts {
   imageUris?: {uri: string; width: number; height: number; altText?: string}[]
   videoUri?: {uri: string; width: number; height: number}
   openGallery?: boolean
+  logContext?: ComposerLogContext
 }
 
 type StateContext = ComposerOpts | undefined

src/state/shell/composer/useComposerKeyboardShortcut.tsx

@@ -61,7 +61,7 @@ export function useComposerKeyboardShortcut() {
       )
         return
       if (event.key === 'n' || event.key === 'N') {
-        openComposer({})
+        openComposer({logContext: 'Other'})
       }
     }
     document.addEventListener('keydown', handler)