Date photo uploads from capture metadata

photo-upload/README.md

@@ -131,11 +131,16 @@ Create **Publish to blog**:
 1. Enable **Show in Share Sheet**, accepting **Images**.
 2. **Ask for Input** (Text): “Caption (optional)”.
 3. Add another **Ask for Input** (Text): “Highlight name (optional)”.
-4. **Make Archive** from **Shortcut Input**, format **ZIP**. Keep this output in
+4. **Repeat with Each** item in **Shortcut Input**. Inside the repeat, use
+   **Get Details of Images** to get **Date Taken**, then **Format Date** using
+   **ISO 8601**. After **End Repeat**, **Combine Text** from **Repeat Results**
+   with **New Lines** and save it as **Photo Dates**. This preserves capture
+   dates even when Shortcuts strips them from the exported JPEG data.
+5. **Make Archive** from **Shortcut Input**, format **ZIP**. Keep this output in
    a variable named **Photo Archive**. This packages every selected image into
    one upload; using an image list directly in a File form field can send only
    the first image on some Shortcuts versions.
-5. **Get Contents of URL**: `https://theread.me/api/photos`.
+6. **Get Contents of URL**: `https://theread.me/api/photos`.
    - Method: **POST**.
    - Header: `Authorization` = `Bearer YOUR_TOKEN`.
    - Request Body: **Form**.
@@ -143,8 +148,9 @@ Create **Publish to blog**:
    - `caption`: type **Text**, value the caption response.
    - `highlight`: type **Text**, value the highlight-name response. Select each
      prompt's specific output variable so the caption and highlight stay separate.
+   - `photo_dates`: type **Text**, value **Photo Dates**.
    - Do not set Content-Type; Shortcuts supplies the multipart boundary.
-6. Show the actual response and check its `count` against the number of selected
+7. Show the actual response and check its `count` against the number of selected
    images. Only show “Uploaded; publishing” when there is no `error`. Optionally poll the returned `status_url`
    with the same header. `pushed` means “GitHub Actions is building/deploying”;
    only `published` means the deployed site's receipt contains this album.
@@ -157,8 +163,14 @@ Older batch documents are still split at render time for backward compatibility.
 Metadata sidecars under `__MACOSX/` and `.DS_Store` are ignored. Ordinary API
 clients can also send repeated `photos` parts; send either `archive` or `photos`,
 never both.
-Select still photos; videos/Live Photo video components aren't supported. Dates
-are upload time in UTC; captions are plain text. A caption is optional.
+Select still photos; videos/Live Photo video components aren't supported. The
+service reads EXIF `DateTimeOriginal` automatically when it is present. Because
+iOS Shortcuts can blank that EXIF field while creating the ZIP, `photo_dates`
+supplies the same Photos-library metadata explicitly, one ISO 8601 value per
+image in archive order. An upload without either source is rejected instead of
+being placed under the upload year. Re-sharing the same images, caption, and
+highlight with dates replaces the earlier undated upload. Captions are plain
+text and optional.
 An optional highlight name (up to 200 characters) adds one link to **Highlights**,
 pointing to the first photo in the batch. Leave it blank for an ordinary upload.