Thin the app's comments

The same pass the server had, on the Kotlin side: comments restating what
the code says are gone, and the ones recording a measurement, a constraint
or an incident are kept but cut to a few lines each. 6540 comment lines to
5674, and 920 lines off the app.

Two doc comments had drifted onto the item above the one they describe --
`contextAfter`'s onto `sessionWorking` in Events.kt, and `UsageMonitor`'s
equivalent on the server was fixed in the previous commit. Each is back on
its own item, which is the only non-comment line this diff moves.

The comments are reflowed to the column limit at their own indentation:
several were written wide, and ktfmt re-wrapped them into lines holding a
single orphan word. `/tmp` script, not kept -- ktfmt is idempotent over the
result, which is the check.

Left alone deliberately: this codebase's remaining comment density is high
because the comments carry things the code cannot say -- what a null means,
what a number was measured against, which bug a guard exists for. Of the
238 one-line doc comments in the app, five were pure restatement of the
name and were removed; the rest each say something the signature does not.

ktfmtFormat, compileDebugKotlin, lintDebug and testDebugUnitTest pass;
cargo test (127), clippy --all-targets and fmt still clean.

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

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

@@ -25,8 +25,7 @@ import androidx.compose.ui.unit.dp
  * These are the two this app understands, and understanding them is what lets it show them: a
  * suggestion while one is being typed, a name in the settings screen that sends one, and a bubble
  * that stays up while the session is too busy to run it. Anything else beginning with "/" is passed
- * through to whatever runs the session, because a dialect's own vocabulary is its own and grows
- * without this list -- it just arrives unannounced and unexplained.
+ * through, because a dialect's own vocabulary grows without this list.
  */
 data class SessionCommand(
     /** With the slash, as it is typed and as it is sent. */
@@ -90,8 +89,8 @@ fun CommandSuggestions(
                     verticalAlignment = Alignment.CenterVertically,
                 ) {
                     Text(
-                        // The command in the colour commands are, so the suggestion and the
-                        // bubble it becomes are visibly the same thing.
+                        // The command in the colour commands are, so the suggestion and the bubble
+                        // it becomes are visibly the same thing.
                         if (command.argument == null) command.name
                         else "${command.name} <${command.argument}>",
                         style = MaterialTheme.typography.titleSmall,
@@ -117,8 +116,7 @@ fun CommandSuggestions(
  * anything appearing here.
  *
  * [waiting] is a command the session is too busy to run yet, which is a state with a spinner and a
- * reason: pressing Compact in the middle of a long turn otherwise does nothing visible for minutes
- * and reads as having been missed.
+ * reason: pressing Compact in the middle of a long turn otherwise does nothing visible for minutes.
  */
 @Composable
 fun CommandBubble(text: String, waiting: Boolean = false) {
@@ -128,8 +126,8 @@ fun CommandBubble(text: String, waiting: Boolean = false) {
             modifier = Modifier.align(Alignment.CenterEnd).padding(start = 48.dp),
         ) {
             Column(Modifier.padding(12.dp)) {
-                // Stated beside the fill rather than inherited: a semantic colour has to carry
-                // its own contrast, because the surface under it will not change to rescue it.
+                // Stated beside the fill rather than inherited: a semantic colour has to carry its
+                // own contrast, because the surface under it will not change to rescue it.
                 Text(text, color = MaterialTheme.colorScheme.inverseOnSurface)
                 if (waiting) {
                     Spacer(Modifier.height(6.dp))