fix(profile-pictures): declare schema ownership and serve avatars as png with nosniff

app/proprietary/src/main/java/stirling/software/proprietary/security/controller/api/ProfilePictureController.java

@@ -132,10 +132,14 @@ public class ProfilePictureController {
         }
         StoredImage image = stored.get();
         return ResponseEntity.ok()
-                .contentType(MediaType.parseMediaType(image.contentType()))
+                // store() re-encodes every upload, so the stored type is always PNG; parsing it
+                // back would only add a 500 path for a row written by anything else.
+                .contentType(MediaType.IMAGE_PNG)
                 // Same URI for every user, so a shared browser must not reuse it. The client keeps
                 // the blob for the session anyway, so there is nothing to gain from caching here.
                 .cacheControl(CacheControl.noStore())
+                .header("X-Content-Type-Options", "nosniff")
+                .header("Content-Disposition", "inline; filename=\"avatar.png\"")
                 .body(image.data());
     }
 

app/proprietary/src/test/java/stirling/software/proprietary/security/controller/api/ProfilePictureControllerTest.java

@@ -12,6 +12,8 @@ import static org.mockito.Mockito.when;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.delete;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.multipart;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.header;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
@@ -30,6 +32,7 @@ import org.junit.jupiter.api.extension.ExtendWith;
 import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
+import org.springframework.http.MediaType;
 import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
@@ -142,12 +145,25 @@ class ProfilePictureControllerTest {
 
         mockMvc.perform(get("/api/v1/user/profile-picture").principal(VIEWER))
                 .andExpect(status().isOk())
+                .andExpect(content().contentType(MediaType.IMAGE_PNG))
+                .andExpect(header().string("X-Content-Type-Options", "nosniff"))
                 .andExpect(
                         result ->
                                 assertThat(result.getResponse().getHeader("Cache-Control"))
                                         .contains("no-store"));
     }
 
+    @Test
+    void aStoredTypeThatIsNotAMediaTypeStillServesAsPngRatherThanA500() throws Exception {
+        // Nothing writes this today, but parsing the column back would turn a bad row into a 500.
+        when(profilePictureService.findImage(1L))
+                .thenReturn(Optional.of(new StoredImage(new byte[] {1, 2, 3}, "not a media type")));
+
+        mockMvc.perform(get("/api/v1/user/profile-picture").principal(VIEWER))
+                .andExpect(status().isOk())
+                .andExpect(content().contentType(MediaType.IMAGE_PNG));
+    }
+
     @Test
     void anUnknownPrincipalGetsA401RatherThanAnEmptyRoster() throws Exception {
         when(userService.findByUsernameIgnoreCase("ghost")).thenReturn(Optional.empty());

app/saas/src/main/java/stirling/software/saas/config/SaasSchemaOwnership.java

@@ -106,6 +106,7 @@ public final class SaasSchemaOwnership {
                     "stored_file_blobs",
                     "stored_files",
                     "user_license_settings",
+                    "user_profile_pictures",
                     "user_server_certificates",
                     "workflow_participants",
                     "workflow_sessions");