Add guided reflection flow with mood-adaptive CBT/ACT questions

Walks users through 3-4 guided questions based on mood category:
positive (great/good) gets gratitude-oriented questions, neutral
(average) gets exploratory questions, and negative (bad/horrible)
gets empathetic questions. Stored as JSON in MoodEntryModel,
integrated into PDF reports, AI summaries, and CSV export.

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

Shared/Services/ReportPDFGenerator.swift

@@ -213,6 +213,18 @@ final class ReportPDFGenerator {
                 <td>\(escapeHTML(weatherStr))</td>
             </tr>
             """
+
+            if let reflection = entry.reflection, reflection.answeredCount > 0 {
+                rows += """
+                <tr class="reflection-row">
+                    <td colspan="4">
+                        <div class="reflection-block">
+                            \(formatReflectionHTML(reflection))
+                        </div>
+                    </td>
+                </tr>
+                """
+            }
         }
 
         return """
@@ -261,6 +273,13 @@ final class ReportPDFGenerator {
         }
     }
 
+    private func formatReflectionHTML(_ reflection: GuidedReflection) -> String {
+        reflection.responses
+            .filter { !$0.answer.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty }
+            .map { "<p class=\"reflection-q\">\(escapeHTML($0.question))</p><p class=\"reflection-a\">\(escapeHTML($0.answer))</p>" }
+            .joined()
+    }
+
     private func escapeHTML(_ string: String) -> String {
         string
             .replacingOccurrences(of: "&", with: "&amp;")
@@ -396,6 +415,10 @@ final class ReportPDFGenerator {
             page-break-inside: avoid;
         }
         .stats { font-size: 10pt; color: #666; margin-bottom: 6px; }
+        .reflection-row td { border-bottom: none; padding-top: 0; }
+        .reflection-block { background: #f9f7ff; padding: 8px 12px; margin: 4px 0 8px 0; border-radius: 4px; }
+        .reflection-q { font-style: italic; font-size: 9pt; color: #666; margin-bottom: 2px; }
+        .reflection-a { font-size: 10pt; color: #333; margin-bottom: 6px; }
         .page-break { page-break-before: always; }
         .no-page-break { page-break-inside: avoid; }
         .footer {