Hold the time apart from the title on any font (#219)

The medium-to-regular step is a no-op on Atkinson Hyperlegible, JetBrains
Mono and imported fonts, which ship no medium face — so the title takes
full ink against the time's 0.8 instead, and the four title sites share
the constant.

Also: the drag copy carries the time its source chip had rather than
deriving one with continuesLeft hardcoded false; the month grid takes
its zone from the state; times are formatted once per row and the chip
width measured once per grid; the chip geometry lives in one file; and
a screen reader hears the time whether or not the chip is wide enough
to draw it.

app/src/test/java/de/jeanlucmakiola/calendula/ui/common/EventTimeStyleTest.kt

@@ -0,0 +1,61 @@
+package de.jeanlucmakiola.calendula.ui.common
+
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextDecoration
+import androidx.compose.ui.unit.sp
+import com.google.common.truth.Truth.assertThat
+import org.junit.jupiter.api.Test
+
+/** How an event's time is set against its title (#219). */
+class EventTimeStyleTest {
+
+    @Test
+    fun `a time steps down to regular and closes its tracking up`() {
+        val label = TextStyle(fontWeight = FontWeight.Medium, letterSpacing = 0.5.sp)
+        val time = label.asEventTime()
+        assertThat(time.fontWeight).isEqualTo(FontWeight.Normal)
+        assertThat(time.letterSpacing).isEqualTo(0.sp)
+    }
+
+    @Test
+    fun `nothing else of the style is touched`() {
+        val label = TextStyle(
+            fontSize = 11.sp,
+            color = Color.Red,
+            textDecoration = TextDecoration.LineThrough,
+        )
+        val time = label.asEventTime()
+        assertThat(time.fontSize).isEqualTo(11.sp)
+        assertThat(time.color).isEqualTo(Color.Red)
+        assertThat(time.textDecoration).isEqualTo(TextDecoration.LineThrough)
+    }
+
+    @Test
+    fun `the title is inked above the time beside it`() {
+        assertThat(TITLE_INK_ALPHA).isGreaterThan(SECONDARY_INK_ALPHA)
+    }
+
+    @Test
+    fun `the time is set apart from the title it precedes`() {
+        val label = inlineTimeLabel("09:05", "Standup", Color.Black)
+        assertThat(label.text).isEqualTo("09:05 Standup")
+        // Only the time is restyled: the title keeps the surface's own label
+        // style, so the two read as separate things on one line (#219).
+        val spans = label.spanStyles
+        assertThat(spans).hasSize(1)
+        assertThat(spans.single().start).isEqualTo(0)
+        assertThat(spans.single().end).isEqualTo("09:05".length)
+        assertThat(spans.single().item.fontWeight).isEqualTo(FontWeight.Normal)
+        assertThat(spans.single().item.letterSpacing).isEqualTo(0.sp)
+        assertThat(spans.single().item.color).isEqualTo(Color.Black)
+    }
+
+    @Test
+    fun `a chip without a time is styled title and nothing else`() {
+        val label = inlineTimeLabel(null, "Standup", Color.Black)
+        assertThat(label.text).isEqualTo("Standup")
+        assertThat(label.spanStyles).isEmpty()
+    }
+}

app/src/test/java/de/jeanlucmakiola/calendula/ui/month/MonthChipTimeTest.kt

@@ -1,9 +1,6 @@
 package de.jeanlucmakiola.calendula.ui.month
 
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.text.font.FontWeight
 import com.google.common.truth.Truth.assertThat
-import de.jeanlucmakiola.calendula.ui.common.inlineTimeLabel
 import de.jeanlucmakiola.calendula.domain.EventInstance
 import kotlinx.datetime.DateTimeUnit
 import kotlinx.datetime.LocalDate
@@ -15,7 +12,8 @@ import kotlinx.datetime.toInstant
 import org.junit.jupiter.api.Test
 import java.util.Locale
 
-/** Which month chips carry a start time, and how it reads (#219). */
+/** Which month chips carry a start time, and how it reads (#219).
+ *  How it is *set* against the title lives in `EventTimeStyleTest`. */
 class MonthChipTimeTest {
 
     private val zone = TimeZone.UTC
@@ -58,26 +56,6 @@ class MonthChipTimeTest {
         assertThat(time).isEqualTo("2:30 pm")
     }
 
-    @Test
-    fun `the time is set apart from the title it precedes`() {
-        val label = inlineTimeLabel("09:05", "Standup", Color.Black)
-        assertThat(label.text).isEqualTo("09:05 Standup")
-        // Only the time is restyled: the title keeps labelSmall as the theme
-        // sets it, so the two read as separate things on one line (#219).
-        val spans = label.spanStyles
-        assertThat(spans).hasSize(1)
-        assertThat(spans.single().start).isEqualTo(0)
-        assertThat(spans.single().end).isEqualTo("09:05".length)
-        assertThat(spans.single().item.fontWeight).isEqualTo(FontWeight.Normal)
-    }
-
-    @Test
-    fun `a chip without a time is styled title and nothing else`() {
-        val label = inlineTimeLabel(null, "Standup", Color.Black)
-        assertThat(label.text).isEqualTo("Standup")
-        assertThat(label.spanStyles).isEmpty()
-    }
-
     @Test
     fun `an all-day chip never shows a time`() {
         val time = monthChipTime(allDay(), continuesLeft = false, zone, is24Hour = true, locale)