refactor: migrate DataExportSection to PlatformServiceMixin

- Use PlatformServiceMixin for platform and database access
- Replace manual PlatformService instantiation with mixin methods/properties
- Use $contacts() for contact export
- Use capabilities for platform checks in template and logic
- Remove unused imports and redundant code
- Lint clean

src/components/DataExportSection.vue

@@ -20,34 +20,33 @@ backup and database export, with platform-specific download instructions. * *
     </router-link>
 
     <button
-      :class="computedStartDownloadLinkClassNames()"
+      :class="{ hidden: isDownloadInProgress }"
       class="block w-full text-center text-md bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-1.5 py-2 rounded-md"
       @click="exportDatabase()"
     >
       Download Contacts
     </button>
     <a
+      v-if="isWebPlatform && downloadUrl"
       ref="downloadLink"
-      :class="computedDownloadLinkClassNames()"
+      :href="downloadUrl"
+      :download="fileName"
       class="block w-full text-center text-md bg-gradient-to-b from-green-500 to-green-800 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-1.5 py-2 rounded-md mb-6"
     >
       If no download happened yet, click again here to download now.
     </a>
-    <div v-if="platformCapabilities.needsFileHandlingInstructions" class="mt-4">
+    <div v-if="capabilities.needsFileHandlingInstructions" class="mt-4">
       <p>
         After the download, you can save the file in your preferred storage
         location.
       </p>
       <ul>
-        <li
-          v-if="platformCapabilities.isIOS"
-          class="list-disc list-outside ml-4"
-        >
+        <li v-if="capabilities.isIOS" class="list-disc list-outside ml-4">
           On iOS: You will be prompted to choose a location to save your backup
           file.
         </li>
         <li
-          v-if="platformCapabilities.isMobile && !platformCapabilities.isIOS"
+          v-if="capabilities.isMobile && !capabilities.isIOS"
           class="list-disc list-outside ml-4"
         >
           On Android: You will be prompted to choose a location to save your
@@ -62,23 +61,19 @@ backup and database export, with platform-specific download instructions. * *
 import { Component, Prop, Vue } from "vue-facing-decorator";
 import { AppString, NotificationIface } from "../constants/app";
 
-import { Contact } from "../db/tables/contacts";
-import * as databaseUtil from "../db/databaseUtil";
-
 import { logger } from "../utils/logger";
-import { PlatformServiceFactory } from "../services/PlatformServiceFactory";
-import {
-  PlatformService,
-  PlatformCapabilities,
-} from "../services/PlatformService";
 import { contactsToExportJson } from "../libs/util";
+import { createNotifyHelpers } from "@/utils/notify";
+import { PlatformServiceMixin } from "@/utils/PlatformServiceMixin";
 
 /**
  * @vue-component
  * Data Export Section Component
  * Handles database export and seed backup functionality with platform-specific behavior
  */
-@Component
+@Component({
+  mixins: [PlatformServiceMixin],
+})
 export default class DataExportSection extends Vue {
   /**
    * Notification function injected by Vue
@@ -101,16 +96,29 @@ export default class DataExportSection extends Vue {
   downloadUrl = "";
 
   /**
-   * Platform service instance for platform-specific operations
+   * Notification helper for consistent notification patterns
    */
-  private platformService: PlatformService =
-    PlatformServiceFactory.getInstance();
+  notify = createNotifyHelpers(this.$notify);
 
   /**
-   * Platform capabilities for the current platform
+   * Computed property to check if we're on web platform
    */
-  private get platformCapabilities(): PlatformCapabilities {
-    return this.platformService.getCapabilities();
+  private get isWebPlatform(): boolean {
+    return this.capabilities.hasFileDownload;
+  }
+
+  /**
+   * Computed property to check if download is in progress
+   */
+  private get isDownloadInProgress(): boolean {
+    return Boolean(this.downloadUrl && this.isWebPlatform);
+  }
+
+  /**
+   * Computed property for the export file name
+   */
+  private get fileName(): string {
+    return `${AppString.APP_NAME_NO_SPACES}-backup-contacts.json`;
   }
 
   /**
@@ -118,7 +126,7 @@ export default class DataExportSection extends Vue {
    * Revokes object URL when component is unmounted (web platform only)
    */
   beforeUnmount() {
-    if (this.downloadUrl && this.platformCapabilities.hasFileDownload) {
+    if (this.downloadUrl && this.isWebPlatform) {
       URL.revokeObjectURL(this.downloadUrl);
     }
   }
@@ -129,84 +137,56 @@ export default class DataExportSection extends Vue {
    * Shows success/error notifications to user
    *
    * @throws {Error} If export fails
-   * @emits {Notification} Success or error notification
    */
-  public async exportDatabase() {
+  public async exportDatabase(): Promise<void> {
     try {
-      let allContacts: Contact[] = [];
-      const platformService = PlatformServiceFactory.getInstance();
-      const result = await platformService.dbQuery(`SELECT * FROM contacts`);
-      if (result) {
-        allContacts = databaseUtil.mapQueryResultToValues(
-          result,
-        ) as unknown as Contact[];
-      }
+      // Fetch contacts from database using mixin's cached method
+      const allContacts = await this.$contacts();
 
       // Convert contacts to export format
       const exportData = contactsToExportJson(allContacts);
       const jsonStr = JSON.stringify(exportData, null, 2);
       const blob = new Blob([jsonStr], { type: "application/json" });
 
-      const fileName = `${AppString.APP_NAME_NO_SPACES}-backup-contacts.json`;
-
-      if (this.platformCapabilities.hasFileDownload) {
-        // Web platform: Use download link
-        this.downloadUrl = URL.createObjectURL(blob);
-        const downloadAnchor = this.$refs.downloadLink as HTMLAnchorElement;
-        downloadAnchor.href = this.downloadUrl;
-        downloadAnchor.download = fileName;
-        downloadAnchor.click();
-        setTimeout(() => URL.revokeObjectURL(this.downloadUrl), 1000);
-      } else if (this.platformCapabilities.hasFileSystem) {
-        // Native platform: Write to app directory
-        await this.platformService.writeAndShareFile(fileName, jsonStr);
+      // Handle export based on platform capabilities
+      if (this.isWebPlatform) {
+        await this.handleWebExport(blob);
+      } else if (this.capabilities.hasFileSystem) {
+        await this.handleNativeExport(jsonStr);
       } else {
         throw new Error("This platform does not support file downloads.");
       }
 
-      this.$notify(
-        {
-          group: "alert",
-          type: "success",
-          title: "Export Successful",
-          text: this.platformCapabilities.hasFileDownload
-            ? "See your downloads directory for the backup."
-            : "The backup file has been saved.",
-        },
-        3000,
+      this.notify.success(
+        this.isWebPlatform
+          ? "See your downloads directory for the backup."
+          : "The backup file has been saved.",
       );
     } catch (error) {
       logger.error("Export Error:", error);
-      this.$notify(
-        {
-          group: "alert",
-          type: "danger",
-          title: "Export Error",
-          text: "There was an error exporting the data.",
-        },
-        3000,
+      this.notify.error(
+        `There was an error exporting the data: ${error instanceof Error ? error.message : "Unknown error"}`,
       );
     }
   }
 
   /**
-   * Computes class names for the initial download button
-   * @returns Object with 'hidden' class when download is in progress (web platform only)
+   * Handles export for web platform using download link
+   * @param blob The blob to download
    */
-  public computedStartDownloadLinkClassNames() {
-    return {
-      hidden: this.downloadUrl && this.platformCapabilities.hasFileDownload,
-    };
+  private async handleWebExport(blob: Blob): Promise<void> {
+    this.downloadUrl = URL.createObjectURL(blob);
+    const downloadAnchor = this.$refs.downloadLink as HTMLAnchorElement;
+    downloadAnchor.click();
+    setTimeout(() => URL.revokeObjectURL(this.downloadUrl), 1000);
   }
 
   /**
-   * Computes class names for the secondary download link
-   * @returns Object with 'hidden' class when no download is available or not on web platform
+   * Handles export for native platforms using file system
+   * @param jsonStr The JSON string to save
    */
-  public computedDownloadLinkClassNames() {
-    return {
-      hidden: !this.downloadUrl || !this.platformCapabilities.hasFileDownload,
-    };
+  private async handleNativeExport(jsonStr: string): Promise<void> {
+    await this.platformService.writeAndShareFile(this.fileName, jsonStr);
   }
 }
 </script>

src/components/LocationSearchSection.vue

@@ -1,7 +1,7 @@
 <template>
   <section v-if="isRegistered" class="mt-4">
     <h2 class="text-lg font-semibold mb-2">Location for Searches</h2>
-    <div class="mb-2" v-if="searchAreaLabel">
+    <div v-if="searchAreaLabel" class="mb-2">
       <span class="text-slate-700">Current Area: </span>
       <span class="font-mono">{{ searchAreaLabel }}</span>
     </div>
@@ -15,14 +15,14 @@
 </template>
 
 <script lang="ts">
-import { Component, Vue, Prop, Emit } from 'vue-facing-decorator';
+import { Component, Vue, Prop, Emit } from "vue-facing-decorator";
 
-@Component({ name: 'LocationSearchSection' })
+@Component({ name: "LocationSearchSection" })
 export default class LocationSearchSection extends Vue {
   @Prop({ required: true }) isRegistered!: boolean;
   @Prop({ required: false }) searchAreaLabel?: string;
 
-  @Emit('set-search-area')
+  @Emit("set-search-area")
   setSearchArea() {}
 }
-</script> 
+</script>

src/components/RegistrationNotice.vue

@@ -7,7 +7,8 @@
     aria-live="polite"
   >
     <p class="mb-4">
-      Before you can publicly announce a new project or time commitment, a friend needs to register you.
+      Before you can publicly announce a new project or time commitment, a
+      friend needs to register you.
     </p>
     <button
       class="inline-block text-md bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-4 py-2 rounded-md"
@@ -19,14 +20,14 @@
 </template>
 
 <script lang="ts">
-import { Component, Vue, Prop, Emit } from 'vue-facing-decorator';
+import { Component, Vue, Prop, Emit } from "vue-facing-decorator";
 
-@Component({ name: 'RegistrationNotice' })
+@Component({ name: "RegistrationNotice" })
 export default class RegistrationNotice extends Vue {
   @Prop({ required: true }) isRegistered!: boolean;
   @Prop({ required: true }) show!: boolean;
 
-  @Emit('share-info')
+  @Emit("share-info")
   shareInfo() {}
 }
-</script> 
+</script>

src/components/UsageLimitsSection.vue

@@ -2,7 +2,9 @@
   <section class="mt-4">
     <h2 class="text-lg font-semibold mb-2">Usage Limits</h2>
     <div class="mb-2">
-      <span v-if="loadingLimits" class="text-slate-700">Checking... <span class="animate-spin">⏳</span></span>
+      <span v-if="loadingLimits" class="text-slate-700"
+        >Checking... <span class="animate-spin">⏳</span></span
+      >
       <span v-else class="text-slate-700">{{ limitsMessage }}</span>
     </div>
     <button
@@ -15,14 +17,14 @@
 </template>
 
 <script lang="ts">
-import { Component, Vue, Prop, Emit } from 'vue-facing-decorator';
+import { Component, Vue, Prop, Emit } from "vue-facing-decorator";
 
-@Component({ name: 'UsageLimitsSection' })
+@Component({ name: "UsageLimitsSection" })
 export default class UsageLimitsSection extends Vue {
   @Prop({ required: true }) loadingLimits!: boolean;
   @Prop({ required: true }) limitsMessage!: string;
 
-  @Emit('recheck-limits')
+  @Emit("recheck-limits")
   recheckLimits() {}
 }
-</script> 
+</script>

src/views/AccountViewView.vue

@@ -766,10 +766,10 @@ import QuickNav from "../components/QuickNav.vue";
 import TopMessage from "../components/TopMessage.vue";
 import UserNameDialog from "../components/UserNameDialog.vue";
 import DataExportSection from "../components/DataExportSection.vue";
-import IdentitySection from '@/components/IdentitySection.vue';
-import RegistrationNotice from '@/components/RegistrationNotice.vue';
-import LocationSearchSection from '@/components/LocationSearchSection.vue';
-import UsageLimitsSection from '@/components/UsageLimitsSection.vue';
+import IdentitySection from "@/components/IdentitySection.vue";
+import RegistrationNotice from "@/components/RegistrationNotice.vue";
+import LocationSearchSection from "@/components/LocationSearchSection.vue";
+import UsageLimitsSection from "@/components/UsageLimitsSection.vue";
 import {
   AppString,
   DEFAULT_IMAGE_API_SERVER,
@@ -1635,13 +1635,13 @@ export default class AccountViewView extends Vue {
   // Placeholder for share dialog logic
   openShareDialog() {
     // TODO: Implement share dialog logic
-    this.notify.info('Share dialog not yet implemented.');
+    this.notify.info("Share dialog not yet implemented.");
   }
 
   get searchAreaLabel(): string {
     // Return a string representing the current search area, or blank if not set
     // Example: return this.searchAreaName || '';
-    return this.isSearchAreasSet ? 'Custom Area Set' : '';
+    return this.isSearchAreasSet ? "Custom Area Set" : "";
   }
 
   onSetSearchArea() {
@@ -1651,7 +1651,7 @@ export default class AccountViewView extends Vue {
 
   openSearchAreaDialog() {
     // TODO: Implement search area dialog logic
-    this.notify.info('Search area dialog not yet implemented.');
+    this.notify.info("Search area dialog not yet implemented.");
   }
 
   onRecheckLimits() {