fix(prospecting): add missing pagination computed properties to JS components

The pagination() macro expects startIndex, endIndex, pageNumbers, totalPages,
nextPage(), and previousPage() to be defined in the Alpine.js component.
Added these to scan-jobs.js, prospects.js, and leads.js.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/prospecting/static/admin/js/scan-jobs.js

@@ -57,11 +57,47 @@ function scanJobs() {
             }
         },
 
+        get startIndex() {
+            if (this.pagination.total === 0) return 0;
+            return (this.pagination.page - 1) * this.pagination.per_page + 1;
+        },
+
+        get endIndex() {
+            const end = this.pagination.page * this.pagination.per_page;
+            return end > this.pagination.total ? this.pagination.total : end;
+        },
+
+        get totalPages() {
+            return this.pagination.pages;
+        },
+
+        get pageNumbers() {
+            const pages = [];
+            const total = this.totalPages;
+            const current = this.pagination.page;
+            if (total <= 7) { for (let i = 1; i <= total; i++) pages.push(i); return pages; }
+            pages.push(1);
+            if (current > 3) pages.push('...');
+            for (let i = Math.max(2, current - 1); i <= Math.min(total - 1, current + 1); i++) pages.push(i);
+            if (current < total - 2) pages.push('...');
+            pages.push(total);
+            return pages;
+        },
+
         goToPage(page) {
+            if (page === '...' || page < 1 || page > this.totalPages) return;
             this.pagination.page = page;
             this.loadJobs();
         },
 
+        nextPage() {
+            if (this.pagination.page < this.totalPages) { this.pagination.page++; this.loadJobs(); }
+        },
+
+        previousPage() {
+            if (this.pagination.page > 1) { this.pagination.page--; this.loadJobs(); }
+        },
+
         jobStatusClass(status) {
             const classes = {
                 pending: 'text-yellow-700 bg-yellow-100 dark:text-yellow-100 dark:bg-yellow-700',