Jul 29 - Photo absolute media URLs for mobile; add photo retention purge

app/api/issues.py

@@ -52,6 +52,13 @@ _UUID_RE = re.compile(
 )
 
 
+def _photo_urls(keys):
+    """Map storage keys to absolute display URLs (presigned on R2, absolute-static
+    on local). Falsy keys are skipped. Used for iPad photo rendering."""
+    from app.utils import storage
+    return [storage.media_url(k, external=True) for k in keys if k]
+
+
 def _issue_payload(issue):
     """Serialise an Issue to the dict returned in list/detail responses."""
     facility = issue.resolved_facility
@@ -72,6 +79,14 @@ def _issue_payload(issue):
         'photo_path':         issue.photo_path or None,
         'mobile_photo_paths': issue.mobile_photo_paths or [],
         'result_photos':      issue.result_photos or [],
+        # Absolute display URLs (presigned on R2, absolute-static on local) for
+        # the iPad, which loads photos off-origin. Relative keys above stay as
+        # keys. photo_urls order mirrors the iPad's evidence merge:
+        # [photo_path] + mobile_photo_paths.
+        'photo_urls':         _photo_urls(
+                                  ([issue.photo_path] if issue.photo_path else [])
+                                  + (issue.mobile_photo_paths or [])),
+        'result_photo_urls':  _photo_urls(issue.result_photos or []),
         # Resolution details — set by web staff after fixing the issue.
         'result_notes':       issue.result_notes or None,
         # Verification fields — set after a director/admin confirms fix.