Make light theme default theme on epub reader

Fix csp Header for reader and google drive (#3108)
Testrun

cps/helper.py

@@ -463,8 +463,8 @@ def rename_author_path(first_author, old_author_dir, renamed_author, calibre_pat
             except OSError as ex:
                 log.error("Rename author from: %s to %s: %s", old_author_path, new_author_path, ex)
                 log.debug(ex, exc_info=True)
-                return _("Rename author from: '%(src)s' to '%(dest)s' failed with error: %(error)s",
-                         src=old_author_path, dest=new_author_path, error=str(ex))
+                raise Exception(_("Rename author from: '%(src)s' to '%(dest)s' failed with error: %(error)s",
+                         src=old_author_path, dest=new_author_path, error=str(ex)))
     return new_authordir
 
 # Moves files in file storage during author/title rename, or from temp dir to file storage

cps/static/js/reading/epub.js

@@ -79,6 +79,6 @@ var reader;
     }
 
     // Default settings load
-    const theme = localStorage.getItem("calibre.reader.theme") ?? Object.keys(themes)[0];
+    const theme = localStorage.getItem("calibre.reader.theme") ?? "lightTheme";
     selectTheme(theme);
 })();

cps/web.py

@@ -89,21 +89,21 @@
 def add_security_headers(resp):
     default_src = ([host.strip() for host in config.config_trustedhosts.split(',') if host] +
                    ["'self'", "'unsafe-inline'", "'unsafe-eval'"])
-    csp = "default-src " + ' '.join(default_src) + "; "
-    csp += "font-src 'self' data:"
+    csp = "default-src " + ' '.join(default_src)
+    if request.endpoint == "web.read_book" and config.config_use_google_drive:
+        csp +=" blob: "
+    csp += "; font-src 'self' data:"
     if request.endpoint == "web.read_book":
-        csp += " blob:"
+        csp += " blob: "
     csp += "; img-src 'self'"
     if request.path.startswith("/author/") and config.config_use_goodreads:
         csp += " images.gr-assets.com i.gr-assets.com s.gr-assets.com"
     csp += " data:"
     if request.endpoint == "edit-book.show_edit_book" or config.config_use_google_drive:
-        csp += " *;"
-    elif request.endpoint == "web.read_book":
-        csp += " blob:; style-src-elem 'self' blob: 'unsafe-inline';"
-    else:
-        csp += ";"
-    csp += " object-src 'none';"
+        csp += " *"
+    if request.endpoint == "web.read_book":
+        csp += " blob: ; style-src-elem 'self' blob: 'unsafe-inline'"
+    csp += "; object-src 'none';"
     resp.headers['Content-Security-Policy'] = csp
     resp.headers['X-Content-Type-Options'] = 'nosniff'
     resp.headers['X-Frame-Options'] = 'SAMEORIGIN'