Implement automatic share link creation and logging for file sharing; make org_id nullable in file_share_links

b0esche_cloud/lib/widgets/share_file_dialog.dart

@@ -51,12 +51,30 @@ class _ShareFileDialogState extends State<ShareFileDialog> {
         _isLoading = false;
       });
     } catch (e) {
-      // If 404 -> no share link yet. Otherwise surface error.
       if (e is ApiError && e.status == 404) {
+        // No link exists, create one automatically
         setState(() {
-          _shareUrl = null;
-          _isLoading = false;
+          _isLoading = true; // Keep loading for creation
         });
+        try {
+          final apiClient = getIt<ApiClient>();
+          final path = widget.orgId.isEmpty || widget.orgId == 'personal'
+              ? '/orgs/files/${widget.fileId}/share'
+              : '/orgs/${widget.orgId}/files/${widget.fileId}/share';
+          final response = await apiClient.postRaw(path, data: {});
+
+          setState(() {
+            _shareUrl = response['shareUrl'];
+            _isLoading = false;
+          });
+        } catch (createError) {
+          setState(() {
+            _error = createError is ApiError
+                ? createError.message
+                : 'Failed to create share link';
+            _isLoading = false;
+          });
+        }
         return;
       }
       setState(() {

go_cloud/internal/http/routes.go

@@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log"
 	"mime/multipart"
 	"net/http"
 	"net/url"
@@ -2822,6 +2823,8 @@ func createFileShareLinkHandler(w http.ResponseWriter, r *http.Request, db *data
 		return
 	}
 
+	log.Printf("Share link created: user_id=%s, file_id=%s, org_id=%v", userID, fileUUID, link.OrgID)
+
 	// Build full URL
 	scheme := "https"
 	if proto := r.Header.Get("X-Forwarded-Proto"); proto != "" {
@@ -3154,6 +3157,8 @@ func createUserFileShareLinkHandler(w http.ResponseWriter, r *http.Request, db *
 		return
 	}
 
+	log.Printf("Share link created: user_id=%s, file_id=%s, org_id=%v", userID, fileUUID, link.OrgID)
+
 	// Build full URL
 	scheme := "https"
 	if proto := r.Header.Get("X-Forwarded-Proto"); proto != "" {

go_cloud/migrations/0009_file_share_links_org_id_nullable.sql

@@ -0,0 +1,3 @@
+-- Make org_id nullable in file_share_links for personal file sharing
+
+ALTER TABLE file_share_links ALTER COLUMN org_id DROP NOT NULL;

go_cloud/migrations/0009_file_share_links_org_id_nullable_down.sql

@@ -0,0 +1,3 @@
+-- Revert: Make org_id not nullable in file_share_links
+
+ALTER TABLE file_share_links ALTER COLUMN org_id SET NOT NULL;