feat(mobile): add pre-login legal pages, multi-image selection, file detail view, search, i18n, HEIC support

- Add Privacy Policy, Terms of Service, and Imprint links to WelcomeScreen
  and LoginScreen for GDPR/Apple compliance (pre-login access)
- Enable multiple image selection in photo library picker
- Add HEIC/HEIF image support to backend (allowed_types, convert_to_pdf, upload handler)
- Create FileDetailScreen with processing status and logs
- Add search bar to FilesScreen with debounced search
- Set up i18n with expo-localization (EN, DE, ES, FR, IT)
- Add language selector to ProfileScreen settings
- Add Imprint link to ProfileScreen legal section
- Update docs and tests

Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>

app/api/files.py

@@ -1477,6 +1477,8 @@ async def ui_upload(
         ".tif",
         ".webp",
         ".svg",
+        ".heic",
+        ".heif",
     }:
         # If it's an image, convert to PDF first
         task = convert_to_pdf.delay(target_path, original_filename=safe_filename, owner_id=upload_owner_id)

app/tasks/convert_to_pdf.py

@@ -205,7 +205,7 @@ def convert_to_pdf(
         ".pdf",  # PDF (already in PDF format but can be processed)
     }
 
-    IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".gif", ".bmp", ".tiff", ".tif", ".webp", ".svg"}
+    IMAGE_EXTENSIONS = {".jpg", ".jpeg", ".png", ".gif", ".bmp", ".tiff", ".tif", ".webp", ".svg", ".heic", ".heif"}
 
     HTML_EXTENSIONS = {".html", ".htm"}
 

app/utils/allowed_types.py

@@ -68,6 +68,8 @@ IMAGE_MIME_TYPES: set[str] = {
     "image/tiff",
     "image/webp",
     "image/svg+xml",
+    "image/heic",
+    "image/heif",
 }
 
 # ---------------------------------------------------------------------------
@@ -124,6 +126,8 @@ ALLOWED_EXTENSIONS: set[str] = {
     ".tif",
     ".webp",
     ".svg",
+    ".heic",
+    ".heif",
     # Web
     ".html",
     ".htm",
@@ -234,7 +238,7 @@ FILE_TYPE_CATEGORIES: dict[str, dict] = {
     },
     "images": {
         "label": "Images",
-        "description": "Image files (.jpg, .png, .gif, .bmp, .tiff, .webp, .svg)",
+        "description": "Image files (.jpg, .png, .gif, .bmp, .tiff, .webp, .svg, .heic, .heif)",
         "mime_types": frozenset(
             {
                 "image/jpeg",
@@ -245,6 +249,8 @@ FILE_TYPE_CATEGORIES: dict[str, dict] = {
                 "image/tiff",
                 "image/webp",
                 "image/svg+xml",
+                "image/heic",
+                "image/heif",
             }
         ),
         "extensions": frozenset(
@@ -258,6 +264,8 @@ FILE_TYPE_CATEGORIES: dict[str, dict] = {
                 ".tif",
                 ".webp",
                 ".svg",
+                ".heic",
+                ".heif",
             }
         ),
     },