style: standardizes capitalization and punctuation in English translations

Improves consistency across user-facing text by:

- Normalizing sentence case in error messages and labels (e.g., "Username is required" instead of "Username Is Required")
- Fixing inconsistent capitalization in feature descriptions and UI text
- Standardizing punctuation, particularly replacing semicolons where appropriate and ensuring consistent usage of "log in" vs "login"
- Correcting article usage ("the left side" instead of "left side")
- Updating terminology consistency (e.g., "tv shows" instead of "tv-shows", "optimized" instead of "optimize")

These changes enhance readability and professionalism throughout the application interface.

translations/en.json

@@ -1,6 +1,6 @@
 {
   "login": {
-    "username_required": "Username Is Required",
+    "username_required": "Username is required",
     "error_title": "Error",
     "login_title": "Log In",
     "login_to_title": "Log in to",
@@ -8,7 +8,7 @@
     "password_placeholder": "Password",
     "login_button": "Log In",
     "quick_connect": "Quick Connect",
-    "enter_code_to_login": "Enter code {{code}} to login",
+    "enter_code_to_login": "Enter code {{code}} to log in",
     "failed_to_initiate_quick_connect": "Failed to initiate Quick Connect",
     "got_it": "Got It",
     "connection_failed": "Connection Failed",
@@ -77,7 +77,7 @@
     "checking_server_connection": "Checking server connection...",
     "no_internet": "No Internet",
     "no_items": "No Items",
-    "no_internet_message": "No worries, you can still watch\ndownloaded content.",
+    "no_internet_message": "No worries, you can still watch\nDownloaded content.",
     "checking_server_connection_message": "Checking connection to server",
     "go_to_downloads": "Go to Downloads",
     "retry": "Retry",
@@ -88,18 +88,18 @@
     "continue_watching": "Continue Watching",
     "next_up": "Next Up",
     "continue_and_next_up": "Continue & Next Up",
-    "recently_added_in": "Recently Added in {{libraryName}}",
+    "recently_added_in": "Recently added in {{libraryName}}",
     "suggested_movies": "Suggested Movies",
     "suggested_episodes": "Suggested Episodes",
     "intro": {
       "welcome_to_streamyfin": "Welcome to Streamyfin",
       "a_free_and_open_source_client_for_jellyfin": "A Free and Open-Source Client for Jellyfin.",
       "features_title": "Features",
-      "features_description": "Streamyfin has a bunch of features and integrates with a wide array of software which you can find in the settings menu, these include:",
+      "features_description": "Streamyfin has a bunch of features and integrates with a wide array of software which you can find in the settings menu; these include:",
       "jellyseerr_feature_description": "Connect to your Seerr instance and request movies directly in the app.",
       "downloads_feature_title": "Downloads",
-      "downloads_feature_description": "Download movies and tv-shows to view offline. Use either the default method or install the optimize server to download files in the background.",
-      "chromecast_feature_description": "Cast movies and tv-shows to your Chromecast devices.",
+      "downloads_feature_description": "Download movies and tv shows to view offline. Use either the default method or install the optimized server to download files in the background.",
+      "chromecast_feature_description": "Cast movies and tv shows to your Chromecast devices.",
       "centralised_settings_plugin_title": "Centralised Settings Plugin",
       "centralised_settings_plugin_description": "Configure settings from a centralised location on your Jellyfin server. All client settings for all users will be synced automatically.",
       "done_button": "Done",
@@ -179,9 +179,9 @@
         "horizontal_swipe_skip": "Horizontal Swipe to Skip",
         "horizontal_swipe_skip_description": "Swipe left/right when controls are hidden to skip",
         "left_side_brightness": "Left Side Brightness Control",
-        "left_side_brightness_description": "Swipe up/down on left side to adjust brightness",
+        "left_side_brightness_description": "Swipe up/down on the left side to adjust brightness",
         "right_side_volume": "Right Side Volume Control",
-        "right_side_volume_description": "Swipe up/down on right side to adjust volume",
+        "right_side_volume_description": "Swipe up/down on the right side to adjust volume",
         "hide_volume_slider": "Hide Volume Slider",
         "hide_volume_slider_description": "Hide the volume slider in the video player",
         "hide_brightness_slider": "Hide Brightness Slider",
@@ -218,7 +218,7 @@
           "Smart": "Smart",
           "Always": "Always",
           "None": "None",
-          "OnlyForced": "OnlyForced"
+          "OnlyForced": "Only Forced"
         },
         "text_color": "Text Color",
         "background_color": "Background Color",
@@ -658,7 +658,7 @@
     "confirm": "Confirm",
     "cancel": "Cancel",
     "yes": "Yes",
-    "whats_wrong": "What's Wrong?",
+    "whats_wrong": "What's wrong?",
     "issue_type": "Issue Type",
     "select_an_issue": "Select an Issue",
     "types": "Types",
@@ -667,7 +667,7 @@
     "report_issue_button": "Report Issue",
     "request_button": "Request",
     "are_you_sure_you_want_to_request_all_seasons": "Are you sure you want to request all seasons?",
-    "failed_to_login": "Failed to Login",
+    "failed_to_login": "Failed to log in",
     "cast": "Cast",
     "details": "Details",
     "status": "Status",
@@ -700,15 +700,15 @@
     "toasts": {
       "jellyseer_does_not_meet_requirements": "Seerr server does not meet minimum version requirements! Please update to at least 2.0.0",
       "jellyseerr_test_failed": "Seerr test failed. Please try again.",
-      "failed_to_test_jellyseerr_server_url": "Failed to test Seerr server url",
+      "failed_to_test_jellyseerr_server_url": "Failed to test Seerr server URL",
       "issue_submitted": "Issue Submitted!",
       "requested_item": "Requested {{item}}!",
       "you_dont_have_permission_to_request": "You don't have permission to request!",
       "something_went_wrong_requesting_media": "Something went wrong requesting media!",
       "request_approved": "Request Approved!",
       "request_declined": "Request Declined!",
-      "failed_to_approve_request": "Failed to Approve Request",
-      "failed_to_decline_request": "Failed to Decline Request"
+      "failed_to_approve_request": "Failed to approve request",
+      "failed_to_decline_request": "Failed to decline request"
     }
   },
   "tabs": {