Read a timeout in units, share one usage answer, and let a tilde mean home

The composer's settings row is outlined bubbles opening round menus, and
the message box is a TextFieldValue so anything put into it without being
typed -- a draft, a share, a slash command -- leaves the cursor at the end.

A tap that puts a text selection away no longer also collapses the card the
text was drawn in: every open and close on the session screen goes through
one guard that spends such a press on the selection.

The usage bar and the usage dialog were two polls of one measurement and
disagreed for up to a minute at a time; they are one feed now, and the
countdown rounds up to the minute in the one place both read.

A working directory typed as ~/repos/ai-app was four literal characters on
the local transport and as an argument on both, so the existence check
refused every home-relative path. It is checked by entering the directory
now, expanded for a local spawn the way the remote shell expands it, and
stored short so the phone draws what somebody would write.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/androidApp/src/main/kotlin/com/example/aiapp/ResetCountdown.kt

@@ -7,13 +7,23 @@ import java.time.OffsetDateTime
 // arithmetic is the same in both and only the sentence around it differs, so everything here
 // returns the span or the state on its own and leaves the wording to the caller.
 
-/** "1d 4h", "3h 12m", "12m" -- the span alone, with no leading or trailing words. */
-fun formatSpan(until: Duration): String =
-    when {
-        until.toHours() >= 24 -> "${until.toDays()}d ${until.toHours() % 24}h"
-        until.toHours() > 0 -> "${until.toHours()}h ${until.toMinutes() % 60}m"
-        else -> "${until.toMinutes()}m"
+/**
+ * "1d 4h", "3h 12m", "12m" -- the span alone, with no leading or trailing words.
+ *
+ * Rounded **up** to the whole minute, rather than truncated as it was. A window with 3h 12m 50s
+ * left is nearer four minutes past the twelve than it is to twelve, and truncating also parks the
+ * figure on a minute it has already spent -- so the reader watching the number decide whether to
+ * start something was consistently told less headroom than they had. One rule, so the session bar
+ * and the usage dialog cannot round a shared measurement two different ways.
+ */
+fun formatSpan(until: Duration): String {
+    val up = if (until.seconds % 60 == 0L && until.nano == 0) until else until.plusMinutes(1)
+    return when {
+        up.toHours() >= 24 -> "${up.toDays()}d ${up.toHours() % 24}h"
+        up.toHours() > 0 -> "${up.toHours()}h ${up.toMinutes() % 60}m"
+        else -> "${up.toMinutes()}m"
     }
+}
 
 /**
  * What is known about when a usage window ends.