Merge remote-tracking branch 'origin/rustify' into worktree-agent-a27094a7db775552a

# Conflicts:
#	AGENTS.md
#	server/src/session/driver.rs

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

@@ -1228,7 +1228,12 @@ fun SessionScreen(
     // the bench scripts keep working when this moves again. They pressed it at a hand-measured
     // coordinate until 2026-09-03, and anything that moved the header made that tap land on
     // whatever now sat there -- reporting a number that was never measured.
-    val copyRenderReport = {
+    // Shared by the ordinary "Copy" button and (bench build only) "Run benchmark": what differs
+    // between them is only whether there is a [extra] section, built by BenchRun.run beforehand --
+    // everything about assembling, copying and logging the report is exactly the same act either
+    // way, and a second copy of it beside `onRunBenchmark` below would be the two silently
+    // disagreeing about what "the report" contains the first time either one changed.
+    fun buildAndCopyReport(extra: List<String> = emptyList()) {
         val report =
             debugReport(
                 device =
@@ -1250,6 +1255,7 @@ fun SessionScreen(
                 accounting =
                     FrameStats.drawPhase().let { (nanos, count) -> drawAccounting(nanos, count) },
                 crash = lastCrash(context),
+                extra = extra,
             )
         context.copyToClipboard("ai-app render report", report)
         // Also to the log, so a session driving the app over adb can read the same report the
@@ -1263,6 +1269,20 @@ fun SessionScreen(
         DebugStats.reset()
         Toast.makeText(context, "Copied render report", Toast.LENGTH_SHORT).show()
     }
+    val copyRenderReport = { buildAndCopyReport() }
+    // Bench build only: P0's scripted scroll-and-stream benchmark (BenchRun.kt), against the
+    // fixture session opened below instead of a real server. Null everywhere else -- see
+    // [SessionSettingsDialog]'s onRunBenchmark.
+    val runBenchmark: (() -> Unit)? =
+        if (BuildConfig.FIXTURE_MODE) {
+            {
+                settingsOpen = false
+                scope.launch {
+                    val extra = BenchRun.run(context, scope, listState)
+                    buildAndCopyReport(extra)
+                }
+            }
+        } else null
     Box(Modifier.fillMaxSize()) {
         Column(Modifier.fillMaxSize()) {
             Row(
@@ -1952,6 +1972,7 @@ fun SessionScreen(
             },
             onDismiss = { settingsOpen = false },
             onCopyRenderReport = copyRenderReport,
+            onRunBenchmark = runBenchmark,
         )
     }
 }