feat(android): add TimerWidget for home screen

android/app/src/main/java/com/chronomind/app/widget/TimerWidget.kt

@@ -0,0 +1,181 @@
+package com.chronomind.app.widget
+
+import android.content.Context
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.glance.*
+import androidx.glance.action.actionStartActivity
+import androidx.glance.appwidget.GlanceAppWidget
+import androidx.glance.appwidget.GlanceAppWidgetReceiver
+import androidx.glance.appwidget.provideContent
+import androidx.glance.layout.*
+import androidx.glance.text.FontWeight
+import androidx.glance.text.Text
+import androidx.glance.text.TextStyle
+import com.chronomind.app.MainActivity
+
+// ── Small Widget: Next Timer Countdown ────────────────────────
+
+class TimerWidgetSmall : GlanceAppWidget() {
+    override suspend fun provideGlance(context: Context, id: GlanceId) {
+        provideContent {
+            SmallTimerContent()
+        }
+    }
+}
+
+class TimerWidgetSmallReceiver : GlanceAppWidgetReceiver() {
+    override val glanceAppWidget: GlanceAppWidget = TimerWidgetSmall()
+}
+
+@Composable
+private fun SmallTimerContent() {
+    Box(
+        modifier = GlanceModifier
+            .fillMaxSize()
+            .background(Color(0xFF14141F))
+            .padding(12.dp)
+            .clickable(actionStartActivity<MainActivity>()),
+        contentAlignment = Alignment.Center
+    ) {
+        Column(
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = "⏱",
+                style = TextStyle(fontSize = 24.sp)
+            )
+            Spacer(modifier = GlanceModifier.height(4.dp))
+            Text(
+                text = "No active timers",
+                style = TextStyle(
+                    color = ColorProvider(Color(0xFFAAAACC)),
+                    fontSize = 12.sp
+                )
+            )
+        }
+    }
+}
+
+// ── Medium Widget: Next 3 Timers ──────────────────────────────
+
+class TimerWidgetMedium : GlanceAppWidget() {
+    override suspend fun provideGlance(context: Context, id: GlanceId) {
+        provideContent {
+            MediumTimerContent()
+        }
+    }
+}
+
+class TimerWidgetMediumReceiver : GlanceAppWidgetReceiver() {
+    override val glanceAppWidget: GlanceAppWidget = TimerWidgetMedium()
+}
+
+@Composable
+private fun MediumTimerContent() {
+    Column(
+        modifier = GlanceModifier
+            .fillMaxSize()
+            .background(Color(0xFF14141F))
+            .padding(12.dp)
+            .clickable(actionStartActivity<MainActivity>())
+    ) {
+        Text(
+            text = "ChronoMind",
+            style = TextStyle(
+                color = ColorProvider(Color(0xFFEEEEFF)),
+                fontSize = 14.sp,
+                fontWeight = FontWeight.Bold
+            )
+        )
+        Spacer(modifier = GlanceModifier.height(8.dp))
+        Text(
+            text = "No active timers",
+            style = TextStyle(
+                color = ColorProvider(Color(0xFF666688)),
+                fontSize = 12.sp
+            )
+        )
+        Spacer(modifier = GlanceModifier.height(4.dp))
+        Text(
+            text = "Tap to create one",
+            style = TextStyle(
+                color = ColorProvider(Color(0xFF6C5CE7)),
+                fontSize = 11.sp
+            )
+        )
+    }
+}
+
+// ── Large Widget: Mini Timeline ───────────────────────────────
+
+class TimerWidgetLarge : GlanceAppWidget() {
+    override suspend fun provideGlance(context: Context, id: GlanceId) {
+        provideContent {
+            LargeTimerContent()
+        }
+    }
+}
+
+class TimerWidgetLargeReceiver : GlanceAppWidgetReceiver() {
+    override val glanceAppWidget: GlanceAppWidget = TimerWidgetLarge()
+}
+
+@Composable
+private fun LargeTimerContent() {
+    Column(
+        modifier = GlanceModifier
+            .fillMaxSize()
+            .background(Color(0xFF14141F))
+            .padding(16.dp)
+            .clickable(actionStartActivity<MainActivity>())
+    ) {
+        Row(verticalAlignment = Alignment.CenterVertically) {
+            Text(
+                text = "ChronoMind",
+                style = TextStyle(
+                    color = ColorProvider(Color(0xFFEEEEFF)),
+                    fontSize = 16.sp,
+                    fontWeight = FontWeight.Bold
+                )
+            )
+            Spacer(modifier = GlanceModifier.defaultWeight())
+            Text(
+                text = "Timeline",
+                style = TextStyle(
+                    color = ColorProvider(Color(0xFF6C5CE7)),
+                    fontSize = 12.sp
+                )
+            )
+        }
+
+        Spacer(modifier = GlanceModifier.height(12.dp))
+
+        // Empty state
+        Box(
+            modifier = GlanceModifier.fillMaxSize(),
+            contentAlignment = Alignment.Center
+        ) {
+            Column(horizontalAlignment = Alignment.CenterHorizontally) {
+                Text(
+                    text = "No active timers",
+                    style = TextStyle(
+                        color = ColorProvider(Color(0xFF666688)),
+                        fontSize = 14.sp
+                    )
+                )
+                Spacer(modifier = GlanceModifier.height(4.dp))
+                Text(
+                    text = "Tap to open ChronoMind",
+                    style = TextStyle(
+                        color = ColorProvider(Color(0xFF6C5CE7)),
+                        fontSize = 12.sp
+                    )
+                )
+            }
+        }
+    }
+}