Allow PDF data export when AI is unavailable on Reports screen

Users without Apple Intelligence can now export their mood data as a
visual PDF with charts and statistics instead of seeing a disabled
Generate button. The existing ExportService.exportPDF is reused for
the non-AI path, gated behind the same privacy confirmation dialog.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Shared/Views/InsightsView/ReportsViewModel.swift

@@ -55,6 +55,10 @@ class ReportsViewModel: ObservableObject {
         validEntryCount >= 3 && isAIAvailable
     }
 
+    var canExportData: Bool {
+        validEntryCount >= 1
+    }
+
     var daySpan: Int {
         let components = Calendar.current.dateComponents([.day], from: startDate, to: endDate)
         return (components.day ?? 0) + 1
@@ -139,6 +143,22 @@ class ReportsViewModel: ObservableObject {
 
     // MARK: - PDF Export
 
+    func exportDataPDF() {
+        let entries = entriesInRange
+        guard !entries.isEmpty else { return }
+
+        let url = ExportService.shared.exportPDF(entries: entries)
+        if let url {
+            exportedPDFURL = url
+            showShareSheet = true
+
+            AnalyticsManager.shared.track(.reportExported(
+                type: "data_export",
+                entryCount: entries.count
+            ))
+        }
+    }
+
     func exportPDF() {
         guard let report = generatedReport else { return }