feat: implement multi-step mood logging wizard

Adds sleep/energy/positivity/self-worth tracking columns to the database
(schema v2 migration), a new 5-option StepScale widget, per-answer chips
at the top of the screen, a 2×2 activity grid chip, and a full step-by-step
wizard flow: mood → sleep (first entry today only) → energy → positivity →
self-worth → activities → review+save.

lib/features/log_mood/widgets/activities_chip.dart

@@ -0,0 +1,85 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import '../../../core/database/app_database.dart';
+import '../../../core/providers/activity_provider.dart';
+
+/// 60 px chip showing selected activities:
+///  - 0 selected : nothing (caller should not render)
+///  - 1 selected : single Material icon centred
+///  - 2–4 selected: 2×2 mini grid of 16 px icons
+///  - 5+ selected : icon + count badge
+class ActivitiesChip extends ConsumerWidget {
+  final Color backgroundColor;
+  final VoidCallback? onTap;
+
+  const ActivitiesChip({
+    super.key,
+    required this.backgroundColor,
+    this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final activitiesAsync = ref.watch(activitiesProvider);
+    final selected = ref.watch(selectedActivitiesProvider);
+
+    return activitiesAsync.when(
+      loading: () => _shell(backgroundColor, onTap,
+          const CircularProgressIndicator(strokeWidth: 2)),
+      error: (_, __) => const SizedBox.shrink(),
+      data: (all) {
+        final picked =
+            all.where((a) => selected.contains(a.id)).toList();
+        if (picked.isEmpty) return const SizedBox(width: 60, height: 60);
+        return _shell(
+          backgroundColor,
+          onTap,
+          _iconContent(picked),
+        );
+      },
+    );
+  }
+
+  Widget _shell(Color bg, VoidCallback? tap, Widget child) {
+    return GestureDetector(
+      onTap: tap,
+      child: Container(
+        width: 60,
+        height: 60,
+        decoration: BoxDecoration(color: bg, shape: BoxShape.circle),
+        child: Center(child: child),
+      ),
+    );
+  }
+
+  Widget _iconContent(List<Activity> picked) {
+    if (picked.length == 1) {
+      return Text(
+        String.fromCharCode(picked[0].iconCodepoint),
+        style: const TextStyle(
+          fontFamily: 'MaterialIcons',
+          fontSize: 24,
+          color: Colors.white,
+        ),
+      );
+    }
+
+    final show = picked.take(4).toList();
+    return Wrap(
+      spacing: 2,
+      runSpacing: 2,
+      children: show
+          .map(
+            (a) => Text(
+              String.fromCharCode(a.iconCodepoint),
+              style: const TextStyle(
+                fontFamily: 'MaterialIcons',
+                fontSize: 16,
+                color: Colors.white,
+              ),
+            ),
+          )
+          .toList(),
+    );
+  }
+}

lib/features/log_mood/widgets/answer_chip.dart

@@ -0,0 +1,48 @@
+import 'package:flutter/material.dart';
+
+/// A single 60 px circular answer chip showing either an emoji or short text.
+class AnswerChip extends StatelessWidget {
+  final String label;
+  final Color backgroundColor;
+  final VoidCallback? onTap;
+
+  const AnswerChip({
+    super.key,
+    required this.label,
+    required this.backgroundColor,
+    this.onTap,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: onTap,
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 250),
+        curve: Curves.easeOut,
+        width: 60,
+        height: 60,
+        decoration: BoxDecoration(
+          color: backgroundColor,
+          shape: BoxShape.circle,
+          boxShadow: onTap != null
+              ? [
+                  BoxShadow(
+                    color: backgroundColor.withValues(alpha: 0.4),
+                    blurRadius: 8,
+                    offset: const Offset(0, 2),
+                  )
+                ]
+              : null,
+        ),
+        child: Center(
+          child: Text(
+            label,
+            style: const TextStyle(fontSize: 22),
+            textAlign: TextAlign.center,
+          ),
+        ),
+      ),
+    );
+  }
+}

lib/features/log_mood/widgets/step_scale.dart

@@ -0,0 +1,72 @@
+import 'package:flutter/material.dart';
+
+/// Reusable 5-option emoji scale used for Energy, Positivity, Self-worth steps.
+/// Tapping an option immediately calls [onSelected].
+class StepScale extends StatelessWidget {
+  final List<String> emojis;
+  final List<String> labels;
+  final List<Color> colors;
+  final int? selected; // 1–5, null = nothing selected yet
+  final ValueChanged<int> onSelected;
+
+  const StepScale({
+    super.key,
+    required this.emojis,
+    required this.labels,
+    required this.colors,
+    required this.selected,
+    required this.onSelected,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
+      children: List.generate(5, (i) {
+        final level = i + 1;
+        final isSelected = selected == level;
+        final color = colors[i];
+        return GestureDetector(
+          onTap: () => onSelected(level),
+          child: AnimatedContainer(
+            duration: const Duration(milliseconds: 200),
+            curve: Curves.easeOut,
+            width: isSelected ? 64 : 52,
+            height: isSelected ? 64 : 52,
+            decoration: BoxDecoration(
+              color: isSelected
+                  ? color.withValues(alpha: 0.15)
+                  : Colors.transparent,
+              shape: BoxShape.circle,
+              border: Border.all(
+                color: isSelected ? color : Colors.transparent,
+                width: 2,
+              ),
+            ),
+            child: Center(
+              child: Column(
+                mainAxisSize: MainAxisSize.min,
+                children: [
+                  Text(
+                    emojis[i],
+                    style: TextStyle(fontSize: isSelected ? 30 : 24),
+                  ),
+                  if (isSelected)
+                    Text(
+                      labels[i],
+                      style: TextStyle(
+                        fontSize: 9,
+                        color: color,
+                        fontWeight: FontWeight.w600,
+                      ),
+                      overflow: TextOverflow.ellipsis,
+                    ),
+                ],
+              ),
+            ),
+          ),
+        );
+      }),
+    );
+  }
+}