WIP: restore database migration system and improve error handling

- Restore runMigrations functionality for database schema migrations
- Remove indexedDBMigrationService.ts (was for IndexedDB to SQLite migration)
- Recreate migrationService.ts and db-sql/migration.ts for schema management
- Add proper TypeScript error handling with type guards in AccountViewView
- Fix CreateAndSubmitClaimResult property access in QuickActionBvcBeginView
- Remove LeafletMouseEvent from Vue components array (it's a type, not component)
- Add null check for UserNameDialog callback to prevent undefined assignment
- Implement extractErrorMessage helper function for consistent error handling
- Update router to remove database-migration route

The migration system now properly handles database schema evolution
across app versions, while the IndexedDB to SQLite migration service
has been removed as it was specific to that one-time migration.

src/views/NewActivityView.vue

@@ -153,15 +153,9 @@ import { Component, Vue } from "vue-facing-decorator";
 import GiftedDialog from "../components/GiftedDialog.vue";
 import QuickNav from "../components/QuickNav.vue";
 import EntityIcon from "../components/EntityIcon.vue";
-import { NotificationIface, USE_DEXIE_DB } from "../constants/app";
-import {
-  db,
-  retrieveSettingsForActiveAccount,
-  updateAccountSettings,
-} from "../db/index";
+import { NotificationIface } from "../constants/app";
 import { Contact } from "../db/tables/contacts";
 import { Router } from "vue-router";
-import { OfferSummaryRecord, OfferToPlanSummaryRecord } from "../interfaces";
 import {
   didInfo,
   displayAmount,
@@ -197,10 +191,7 @@ export default class NewActivityView extends Vue {
 
   async created() {
     try {
-      let settings = await databaseUtil.retrieveSettingsForActiveAccount();
-      if (USE_DEXIE_DB) {
-        settings = await retrieveSettingsForActiveAccount();
-      }
+      const settings = await databaseUtil.retrieveSettingsForActiveAccount();
       this.apiServer = settings.apiServer || "";
       this.activeDid = settings.activeDid || "";
       this.lastAckedOfferToUserJwtId = settings.lastAckedOfferToUserJwtId || "";
@@ -214,10 +205,6 @@ export default class NewActivityView extends Vue {
       this.allContacts = databaseUtil.mapQueryResultToValues(
         queryResult,
       ) as unknown as Contact[];
-      if (USE_DEXIE_DB) {
-        await db.open();
-        this.allContacts = await db.contacts.toArray();
-      }
 
       this.allMyDids = await retrieveAccountDids();
 
@@ -260,11 +247,6 @@ export default class NewActivityView extends Vue {
       await databaseUtil.updateDidSpecificSettings(this.activeDid, {
         lastAckedOfferToUserJwtId: this.newOffersToUser[0].jwtId,
       });
-      if (USE_DEXIE_DB) {
-        await updateAccountSettings(this.activeDid, {
-          lastAckedOfferToUserJwtId: this.newOffersToUser[0].jwtId,
-        });
-      }
       // note that we don't update this.lastAckedOfferToUserJwtId in case they
       // later choose the last one to keep the offers as new
       this.$notify(
@@ -288,21 +270,11 @@ export default class NewActivityView extends Vue {
       await databaseUtil.updateDidSpecificSettings(this.activeDid, {
         lastAckedOfferToUserJwtId: this.newOffersToUser[index + 1].jwtId,
       });
-      if (USE_DEXIE_DB) {
-        await db.settings.update(this.activeDid, {
-          lastAckedOfferToUserJwtId: this.newOffersToUser[index + 1].jwtId,
-        });
-      }
     } else {
       // it's the last entry (or not found), so just keep it the same
       await databaseUtil.updateDidSpecificSettings(this.activeDid, {
         lastAckedOfferToUserJwtId: this.lastAckedOfferToUserJwtId,
       });
-      if (USE_DEXIE_DB) {
-        await db.settings.update(this.activeDid, {
-          lastAckedOfferToUserJwtId: this.lastAckedOfferToUserJwtId,
-        });
-      }
     }
     this.$notify(
       {
@@ -323,12 +295,6 @@ export default class NewActivityView extends Vue {
         lastAckedOfferToUserProjectsJwtId:
           this.newOffersToUserProjects[0].jwtId,
       });
-      if (USE_DEXIE_DB) {
-        await db.settings.update(this.activeDid, {
-          lastAckedOfferToUserProjectsJwtId:
-            this.newOffersToUserProjects[0].jwtId,
-        });
-      }
       // note that we don't update this.lastAckedOfferToUserProjectsJwtId in case
       // they later choose the last one to keep the offers as new
       this.$notify(
@@ -353,24 +319,12 @@ export default class NewActivityView extends Vue {
         lastAckedOfferToUserProjectsJwtId:
           this.newOffersToUserProjects[index + 1].jwtId,
       });
-      if (USE_DEXIE_DB) {
-        await db.settings.update(this.activeDid, {
-          lastAckedOfferToUserProjectsJwtId:
-            this.newOffersToUserProjects[index + 1].jwtId,
-        });
-      }
     } else {
       // it's the last entry (or not found), so just keep it the same
       await databaseUtil.updateDidSpecificSettings(this.activeDid, {
         lastAckedOfferToUserProjectsJwtId:
           this.lastAckedOfferToUserProjectsJwtId,
       });
-      if (USE_DEXIE_DB) {
-        await db.settings.update(this.activeDid, {
-          lastAckedOfferToUserProjectsJwtId:
-            this.lastAckedOfferToUserProjectsJwtId,
-        });
-      }
     }
     this.$notify(
       {