page_params: Remove duplicate debug_mode field.

This had the same value as development_environment, I believe in a way
likely to persist long term, and was less clear about its meaning.

static/js/blueslip.js

@@ -81,7 +81,7 @@ function report_error(
     stack = "No stacktrace available",
     {show_ui_msg = false, more_info} = {},
 ) {
-    if (page_params.debug_mode) {
+    if (page_params.development_environment) {
         // In development, we display blueslip errors in the web UI,
         // to make them hard to miss.
         blueslip_stacktrace.display_stacktrace(msg, stack);
@@ -228,7 +228,7 @@ export function info(msg, more_info) {
 export function warn(msg, more_info) {
     const args = build_arg_list(msg, more_info);
     logger.warn(...args);
-    if (page_params.debug_mode) {
+    if (page_params.development_environment) {
         console.trace();
     }
 }
@@ -238,7 +238,7 @@ export function error(msg, more_info, stack = new Error("dummy").stack) {
     logger.error(...args);
     report_error(msg, stack, {more_info});
 
-    if (page_params.debug_mode) {
+    if (page_params.development_environment) {
         throw new BlueslipError(msg, more_info);
     }
 

zerver/context_processors.py

@@ -30,7 +30,7 @@ from zproject.backends import (
 )
 
 DEFAULT_PAGE_PARAMS = {
-    "debug_mode": settings.DEBUG,
+    "development_environment": settings.DEVELOPMENT,
     "webpack_public_path": staticfiles_storage.url(settings.WEBPACK_BUNDLES),
 }
 

zerver/lib/home.py

@@ -220,8 +220,7 @@ def build_page_params_for_home_page_load(
     # Pass parameters to the client-side JavaScript code.
     # These end up in a JavaScript Object named 'page_params'.
     page_params = dict(
-        # Server settings.
-        debug_mode=settings.DEBUG,
+        ## Server settings.
         test_suite=settings.TEST_SUITE,
         poll_timeout=settings.POLL_TIMEOUT,
         insecure_desktop_app=insecure_desktop_app,
@@ -232,7 +231,7 @@ def build_page_params_for_home_page_load(
         search_pills_enabled=settings.SEARCH_PILLS_ENABLED,
         # Only show marketing email settings if on Zulip Cloud
         enable_marketing_emails_enabled=settings.CORPORATE_ENABLED,
-        # Misc. extra data.
+        ## Misc. extra data.
         default_language_name=get_language_name(register_ret["default_language"]),
         language_list_dbl_col=get_language_list_for_templates(register_ret["default_language"]),
         language_list=get_language_list(),

zerver/tests/test_home.py

@@ -57,7 +57,6 @@ class HomeTest(ZulipTestCase):
         "cross_realm_bots",
         "custom_profile_field_types",
         "custom_profile_fields",
-        "debug_mode",
         "default_language",
         "default_language_name",
         "default_view",