Migrate OfferDetailsView.vue to PlatformServiceMixin, notification constants, and template streamlining

- Replaced all databaseUtil and direct PlatformServiceFactory usage with PlatformServiceMixin methods
- Abstracted all notification messages to src/constants/notifications.ts and migrated to notify helper
- Added computed properties for assignment labels to streamline template logic
- Removed unused imports and resolved all linter errors
- Updated migration documentation and ensured security audit compliance
- All changes validated with lint-fix and ready for human testing

src/constants/notifications.ts

@@ -200,6 +200,92 @@ export const NOTIFY_REGISTER_NOT_AVAILABLE = {
   message: "You must get registered before you can create invites.",
 };
 
+// OfferDetailsView.vue specific constants
+// Used in: OfferDetailsView.vue (mounted method - error loading offer details)
+export const NOTIFY_OFFER_ERROR_LOADING = {
+  title: "Error",
+  message: "There was an error loading the offer details.",
+};
+
+// Used in: OfferDetailsView.vue (loadPreviousOffer method - previous record error)
+export const NOTIFY_OFFER_ERROR_PREVIOUS_RECORD = {
+  title: "Retrieval Error",
+  message:
+    "The previous record isn't available for editing. If you submit, you'll create a new record.",
+};
+
+// Used in: OfferDetailsView.vue (confirm method - no identifier error)
+export const NOTIFY_OFFER_ERROR_NO_IDENTIFIER = {
+  title: "Error",
+  message: "You must select an identifier before you can record a offer.",
+};
+
+// Used in: OfferDetailsView.vue (confirm method - negative amount error)
+export const NOTIFY_OFFER_ERROR_NEGATIVE_AMOUNT = {
+  title: "",
+  message: "You may not send a negative number.",
+};
+
+// Used in: OfferDetailsView.vue (confirm method - no description error)
+export const NOTIFY_OFFER_ERROR_NO_DESCRIPTION = {
+  title: "Error",
+  message: "You must enter a description or some number of {unit}.",
+};
+
+// Used in: OfferDetailsView.vue (confirm method - processing status)
+export const NOTIFY_OFFER_PROCESSING = {
+  title: "",
+  message: "Recording the offer...",
+};
+
+// Used in: OfferDetailsView.vue (notifyUserOfProject method - no project error)
+export const NOTIFY_OFFER_ERROR_PROJECT_ASSIGNMENT = {
+  title: "Error",
+  message: "To assign to a project, you must open this page through a project.",
+};
+
+// Used in: OfferDetailsView.vue (notifyUserOfProject method - conflict error)
+export const NOTIFY_OFFER_ERROR_PROJECT_RECIPIENT_CONFLICT = {
+  title: "Error",
+  message: "You cannot assign both to a project and to a recipient.",
+};
+
+// Used in: OfferDetailsView.vue (notifyUserOfRecipient method - no recipient error)
+export const NOTIFY_OFFER_ERROR_RECIPIENT_ASSIGNMENT = {
+  title: "Error",
+  message: "To assign to a recipient, you must open this page from a contact.",
+};
+
+// Used in: OfferDetailsView.vue (notifyUserOfRecipient method - conflict error)
+export const NOTIFY_OFFER_ERROR_RECIPIENT_PROJECT_CONFLICT = {
+  title: "Error",
+  message: "You cannot assign both to a recipient and to a project.",
+};
+
+// Used in: OfferDetailsView.vue (recordOffer method - creation error)
+export const NOTIFY_OFFER_ERROR_CREATION = {
+  title: "Error",
+  message: "There was an error creating the offer.",
+};
+
+// Used in: OfferDetailsView.vue (recordOffer method - success)
+export const NOTIFY_OFFER_SUCCESS_RECORDED = {
+  title: "Success",
+  message: "That offer was recorded.",
+};
+
+// Used in: OfferDetailsView.vue (recordOffer method - recordation error)
+export const NOTIFY_OFFER_ERROR_RECORDATION = {
+  title: "Error",
+  message: "There was an error recording the offer.",
+};
+
+// Used in: OfferDetailsView.vue (explainData method - privacy info)
+export const NOTIFY_OFFER_PRIVACY_INFO = {
+  title: "Data Sharing",
+  message: "Your data is shared with the world when you sign and send.",
+};
+
 // Used in: [Component usage not yet documented]
 export const NOTIFY_REGISTER_PROCESSING = {
   title: "Processing",