fix: update save prompt copy when editing existing draft

When editing an existing draft (vs creating a new one), use "Save
changes" instead of "Save draft" in the save/discard prompts. This
provides clearer context to the user about what action they're taking.

Add isEditingDraft prop to DraftsButton and ComposerTopBar, and
update both prompts (in DraftsButton and Composer) with conditional
copy based on whether we're editing an existing draft.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/view/com/composer/Composer.tsx

@@ -845,7 +845,8 @@ export const ComposePost = ({
             onSaveDraft={saveCurrentDraft}
             onDiscard={handleClearComposer}
             isEmpty={isComposerEmpty}
-            isDirty={composerState.isDirty}>
+            isDirty={composerState.isDirty}
+            isEditingDraft={!!composerState.draftId}>
             {missingAltError && <AltTextReminder error={missingAltError} />}
             <ErrorBanner
               error={error}
@@ -900,14 +901,24 @@ export const ComposePost = ({
           control={discardPromptControl}
           webOptions={{vertical: true}}>
           <Prompt.TitleText>
-            <Trans>Save draft?</Trans>{' '}
+            {composerState.draftId ? (
+              <Trans>Save changes?</Trans>
+            ) : (
+              <Trans>Save draft?</Trans>
+            )}
           </Prompt.TitleText>
           <Prompt.DescriptionText>
-            {_(msg`You can save this draft to continue later.`)}
+            {composerState.draftId
+              ? _(msg`You have unsaved changes to this draft.`)
+              : _(msg`You can save this draft to continue later.`)}
           </Prompt.DescriptionText>
           <Prompt.Actions>
             <Prompt.Action
-              cta={_(msg`Save Draft`)}
+              cta={
+                composerState.draftId
+                  ? _(msg`Save changes`)
+                  : _(msg`Save draft`)
+              }
               onPress={handleSaveDraft}
               color="primary"
             />
@@ -1142,6 +1153,7 @@ function ComposerTopBar({
   onDiscard,
   isEmpty,
   isDirty,
+  isEditingDraft,
   topBarAnimatedStyle,
   children,
 }: {
@@ -1158,6 +1170,7 @@ function ComposerTopBar({
   onDiscard: () => void
   isEmpty: boolean
   isDirty: boolean
+  isEditingDraft: boolean
   topBarAnimatedStyle: StyleProp<ViewStyle>
   children?: React.ReactNode
 }) {
@@ -1192,6 +1205,7 @@ function ComposerTopBar({
             onDiscard={onDiscard}
             isEmpty={isEmpty}
             isDirty={isDirty}
+            isEditingDraft={isEditingDraft}
           />
         )}
         {isPublishing ? (

src/view/com/composer/drafts/DraftsButton.tsx

@@ -14,12 +14,14 @@ export function DraftsButton({
   onDiscard,
   isEmpty,
   isDirty,
+  isEditingDraft,
 }: {
   onSelectDraft: (draft: DraftSummary) => void
   onSaveDraft: () => Promise<void>
   onDiscard: () => void
   isEmpty: boolean
   isDirty: boolean
+  isEditingDraft: boolean
 }) {
   const {_} = useLingui()
   const draftsDialogControl = Dialog.useDialogControl()
@@ -69,17 +71,27 @@ export function DraftsButton({
 
       <Prompt.Outer control={savePromptControl} webOptions={{vertical: true}}>
         <Prompt.TitleText>
-          <Trans>Save current draft?</Trans>
+          {isEditingDraft ? (
+            <Trans>Save changes?</Trans>
+          ) : (
+            <Trans>Save draft?</Trans>
+          )}
         </Prompt.TitleText>
         <Prompt.DescriptionText>
-          <Trans>
-            You have unsaved changes. Would you like to save them before viewing
-            your drafts?
-          </Trans>
+          {isEditingDraft ? (
+            <Trans>
+              You have unsaved changes. Would you like to save them before
+              viewing your drafts?
+            </Trans>
+          ) : (
+            <Trans>
+              Would you like to save this as a draft before viewing your drafts?
+            </Trans>
+          )}
         </Prompt.DescriptionText>
         <Prompt.Actions>
           <Prompt.Action
-            cta={_(msg`Save changes`)}
+            cta={isEditingDraft ? _(msg`Save changes`) : _(msg`Save draft`)}
             onPress={handleSaveAndOpen}
             color="primary"
           />