feat: Add build date functionality and enhance documentation pages

- Added a script to save the build date during Docker image build.
- Introduced a build_date property in the Settings class to retrieve the build date from the environment or file.
- Enhanced the homepage to display system statistics including processed files and active integrations.
- Updated the about page with a comprehensive list of features.
- Added new privacy, imprint, cookies, and terms pages with relevant content.
- Improved the license page with related information links.
- Refactored the base template for better mobile responsiveness and footer links.

app/views/general.py

@@ -4,21 +4,55 @@ General routes for the application homepage and basic pages.
 from fastapi import Request, HTTPException
 from fastapi.responses import FileResponse
 from pathlib import Path
+from datetime import date
 
 from app.views.base import APIRouter, templates, require_login
+from app.utils.config_validator import get_provider_status, validate_storage_configs
 
 router = APIRouter()
 
 @router.get("/", include_in_schema=False)
 async def serve_index(request: Request):
     """Serve the index/home page."""
-    return templates.TemplateResponse("index.html", {"request": request})
+    # Get provider information from config validator
+    providers = get_provider_status()
+    
+    # Count configured providers
+    configured_providers = sum(1 for provider in providers.values() if provider['configured'])
+    
+    # Count different types of storage targets
+    storage_issues = validate_storage_configs()
+    configured_storage_targets = sum(1 for provider, issues in storage_issues.items() 
+                                     if not issues and provider in ['dropbox', 'nextcloud', 'sftp', 
+                                                                    's3', 'ftp', 'webdav', 
+                                                                    'google_drive', 'onedrive'])
+    
+    # Create stats object to pass to the template
+    stats = {
+        "processed_files": 0,  # Placeholder - would need actual DB query
+        "active_integrations": configured_providers,
+        "storage_targets": configured_storage_targets
+    }
+    
+    return templates.TemplateResponse("index.html", {"request": request, "stats": stats})
 
 @router.get("/about", include_in_schema=False)
 async def serve_about(request: Request):
     """Serve the about page."""
     return templates.TemplateResponse("about.html", {"request": request})
 
+@router.get("/privacy", include_in_schema=False)
+async def serve_privacy(request: Request):
+    """Serve the privacy policy page."""
+    # Pass the current date for the "Last Updated" field
+    current_date = date.today().strftime("%B %d, %Y")
+    return templates.TemplateResponse("privacy.html", {"request": request, "current_date": current_date})
+
+@router.get("/imprint", include_in_schema=False)
+async def serve_imprint(request: Request):
+    """Serve the imprint/impressum page."""
+    return templates.TemplateResponse("imprint.html", {"request": request})
+
 @router.get("/upload", include_in_schema=False)
 @require_login
 async def serve_upload(request: Request):
@@ -43,7 +77,7 @@ async def serve_license(request: Request):
         Path("/app/LICENSE"),  # Docker container path
         Path.home() / "LICENSE",  # Home directory (fallback)
     ]
-    
+
     license_text = None
     
     # Try to read from any of the possible locations
@@ -66,7 +100,7 @@ This software is licensed under the Apache License 2.0.
 The full license text could not be located on this system.
 Please visit http://www.apache.org/licenses/LICENSE-2.0 for the complete license text.
 """
-    
+
     return templates.TemplateResponse(
         "license.html", 
         {
@@ -74,3 +108,15 @@ Please visit http://www.apache.org/licenses/LICENSE-2.0 for the complete license
             "license_text": license_text
         }
     )
+
+@router.get("/cookies", include_in_schema=False)
+async def serve_cookies(request: Request):
+    """Serve the cookie policy page."""
+    current_date = date.today().strftime("%B %d, %Y")
+    return templates.TemplateResponse("cookies.html", {"request": request, "current_date": current_date})
+
+@router.get("/terms", include_in_schema=False)
+async def serve_terms(request: Request):
+    """Serve the terms of service page."""
+    current_date = date.today().strftime("%B %d, %Y")
+    return templates.TemplateResponse("terms.html", {"request": request, "current_date": current_date})