Ensure uploaded images are permanently stored in object storage

Integrates Replit Object Storage for persistent file uploads, replacing ephemeral local storage and adding `google-cloud-storage` dependency.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: cd9a7d26-a4e5-4215-975c-c59f4ed1f06d
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 093bebfc-3b06-4716-8c6a-2dea6a89816d
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/d0a1d46d-d203-4308-bc6a-312ac7c0243b/cd9a7d26-a4e5-4215-975c-c59f4ed1f06d/D3TcT39

object_storage.py

@@ -0,0 +1,93 @@
+"""
+Object Storage Service for FTC Team Website
+Handles persistent file uploads using Google Cloud Storage (Replit Object Storage)
+"""
+
+from google.cloud import storage
+import os
+from uuid import uuid4
+from werkzeug.utils import secure_filename
+
+REPLIT_SIDECAR_ENDPOINT = "http://127.0.0.1:1106"
+
+
+class ObjectStorageService:
+    def __init__(self):
+        """Initialize the object storage client with Replit credentials"""
+        self.client = storage.Client(
+            credentials={
+                "audience": "replit",
+                "subject_token_type": "access_token",
+                "token_url": f"{REPLIT_SIDECAR_ENDPOINT}/token",
+                "type": "external_account",
+                "credential_source": {
+                    "url": f"{REPLIT_SIDECAR_ENDPOINT}/credential",
+                    "format": {
+                        "type": "json",
+                        "subject_token_field_name": "access_token",
+                    },
+                },
+                "universe_domain": "googleapis.com",
+            },
+            project="",
+        )
+        
+        # Get bucket name from environment variable
+        self.bucket_name = os.environ.get('OBJECT_STORAGE_BUCKET')
+        if not self.bucket_name:
+            raise ValueError(
+                "OBJECT_STORAGE_BUCKET environment variable not set. "
+                "Please create a bucket in the Object Storage pane and set this variable."
+            )
+        
+        self.bucket = self.client.bucket(self.bucket_name)
+    
+    def upload_file(self, file, folder='uploads'):
+        """
+        Upload a file to object storage
+        
+        Args:
+            file: Werkzeug FileStorage object
+            folder: Folder name in the bucket (default: 'uploads')
+        
+        Returns:
+            str: Public URL of the uploaded file
+        """
+        if not file or not file.filename:
+            return None
+        
+        # Generate unique filename
+        original_filename = secure_filename(file.filename)
+        file_extension = os.path.splitext(original_filename)[1]
+        unique_filename = f"{uuid4()}{file_extension}"
+        object_name = f"{folder}/{unique_filename}"
+        
+        # Upload to bucket
+        blob = self.bucket.blob(object_name)
+        blob.upload_from_file(
+            file.stream,
+            content_type=file.content_type or 'application/octet-stream'
+        )
+        
+        # Make the blob publicly accessible
+        blob.make_public()
+        
+        # Return the public URL
+        return blob.public_url
+    
+    def get_blob(self, url):
+        """Get a blob object from a URL"""
+        if not url or not url.startswith('https://storage.googleapis.com/'):
+            return None
+        
+        # Extract blob name from URL
+        parts = url.replace(f'https://storage.googleapis.com/{self.bucket_name}/', '')
+        return self.bucket.blob(parts)
+    
+    def delete_file(self, url):
+        """Delete a file from object storage"""
+        blob = self.get_blob(url)
+        if blob and blob.exists():
+            blob.delete()
+            return True
+        return False