Add QuillSense support with settings and integration

- Introduced new "QuillSense" feature for AI-assisted book creation.
- Added QuillSense settings panel with advanced options and disable/enable functionality.
- Updated GhostWriter and TextEditor components to respect QuillSense settings.
- Extended models and repositories to track and manage QuillSense state per book.
- Localized new strings for English and French.

lib/locales/en.json

@@ -450,6 +450,7 @@
     "characters": "Characters",
     "objectsList": "Objects list",
     "bookGoals": "Book goals",
+    "quillsense": "QuillSense Settings",
     "save": "Save",
     "notAvailable": "Option not available"
   },
@@ -489,6 +490,7 @@
     "title": "Ghost Writer",
     "description": "Turn your ideas into captivating prose",
     "subscriptionRequired": "You must be subscribed to Quill Sense to use Ghost Writer.",
+    "quillsenseDisabled": "QuillSense is disabled for this book. You can enable it in the book settings.",
     "subscribe": "Subscribe",
     "length": "Text length",
     "minimum": "Minimum",
@@ -768,7 +770,8 @@
     "locations": "Locations",
     "characters": "Characters",
     "objects": "Objects",
-    "goals": "Goals"
+    "goals": "Goals",
+    "quillsense": "QuillSense"
   },
   "basicInformationSetting": {
     "error": {
@@ -829,7 +832,8 @@
   "common": {
     "cancel": "Cancel",
     "confirm": "Confirm",
-    "unknownError": "An unknown error occurred"
+    "unknownError": "An unknown error occurred",
+    "loading": "Loading..."
   },
   "editor": {
     "error": {
@@ -993,5 +997,22 @@
     "deleteLocalToo": "Also delete local version",
     "deleteLocalWarning": "Warning: This action will delete the book from the server AND your device. This action is irreversible.",
     "errorUnknown": "An unknown error occurred while deleting the book."
+  },
+  "quillSenseSetting": {
+    "title": "QuillSense Settings",
+    "description": "Manage AI features for this book.",
+    "enableSection": "Enable/Disable QuillSense",
+    "enableLabel": "QuillSense enabled",
+    "enableDescription": "When enabled, AI features like Ghost Writer and QuillSense will be available for this book.",
+    "advancedSection": "Advanced Settings",
+    "advancedPromptLabel": "Advanced Prompt",
+    "advancedPromptPlaceholder": "Enter custom instructions for the AI...",
+    "advancedPromptHint": "These instructions will be included in every text generation for this book.",
+    "disabledWarning": "QuillSense is disabled. AI features will not be available for this book.",
+    "errorFetch": "Error fetching QuillSense settings.",
+    "errorSave": "Error saving settings.",
+    "errorUnknown": "An unknown error occurred.",
+    "successSave": "QuillSense settings saved successfully.",
+    "noBookSelected": "No book selected."
   }
 }