feat(chat): render prose as prose, tool calls as steps; restore the original mark

Two problems from the first real use of the app.

RENDERING. Every line of a run was drawn as flat monospace text, so the parts
that were markdown arrived as their source: tables as rows of pipe characters,
`**bold**` as asterisks, headings as hashes. That is the "gibberish between real
replies" — there was never any gibberish, only unrendered markdown sitting
between the parts that happened to contain none.

The server already emits a structured line vocabulary (▶ header, ⚙ tool,
→ result, · thinking, ■ footer, everything else prose). AgentOutput now groups
those lines into blocks and renders each as what it is:

  prose   -> MarkdownBody, with tables, code blocks, lists and headings
  tool    -> a compact one-line step, its result collapsed behind it
  thinking-> a single pulsing marker; consecutive ones collapse
  header  -> present but recessive; useful only when something goes wrong

A tool result is attached to the step above it rather than printed inline, so a
500-character command output no longer sits between two paragraphs. Tap to
expand it, long-press the step to copy the command.

THE ICON. I rebuilt the flame by hand instead of taking it from the APK that was
sitting in front of me the whole time — a worse copy of an asset I already had.
The original icon.png, icon_foreground.png and flame.png are lifted from the old
build's flutter_assets and are now both the launcher icon and the in-app mark,
loaded from the same file so the two cannot drift.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

android/app/build.gradle.kts

@@ -10,6 +10,10 @@ android {
     ndkVersion = flutter.ndkVersion
 
     compileOptions {
+        // flutter_local_notifications uses java.time APIs that do not exist on
+        // older Android runtimes; desugaring backports them. Without this the
+        // AAR metadata check fails the build outright.
+        isCoreLibraryDesugaringEnabled = true
         sourceCompatibility = JavaVersion.VERSION_17
         targetCompatibility = JavaVersion.VERSION_17
     }
@@ -47,3 +51,7 @@ kotlin {
 flutter {
     source = "../.."
 }
+
+dependencies {
+    coreLibraryDesugaring("com.android.tools:desugar_jdk_libs:2.1.4")
+}

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@color/ic_launcher_background"/>
+  <foreground>
+      <inset
+          android:drawable="@drawable/ic_launcher_foreground"
+          android:inset="16%" />
+  </foreground>
+</adaptive-icon>

android/app/src/main/res/values/colors.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#0B0B0D</color>
+</resources>
\ No newline at end of file

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-all.zip

lib/features/chats/chat_screen.dart

@@ -416,12 +416,9 @@ class _Bubble extends StatelessWidget {
                 ),
             ],
           ),
-          if (message.content.isNotEmpty) ...[
+          if (message.content.isNotEmpty || running) ...[
             const SizedBox(height: 10),
-            AgentOutput(text: message.content),
-          ] else if (running) ...[
-            const SizedBox(height: 10),
-            const Text('Starting…', style: TextStyle(color: Ember.textFaint, fontSize: 13)),
+            AgentOutput(text: message.content, running: running),
           ],
         ],
       ),

lib/widgets/flame_mark.dart

@@ -2,35 +2,43 @@ import 'package:flutter/material.dart';
 
 import '../core/theme.dart';
 
-/// The app mark: a flame on a dark rounded tile. Drawn rather than shipped as a
-/// bitmap so it stays sharp at every size and the gradient matches the theme
-/// tokens instead of drifting from them.
+/// The app mark — the original Son of Anton flame, carried over from the first
+/// build's assets rather than redrawn. It is the identity the app is known by;
+/// a "close enough" reconstruction is not the same thing.
+///
+/// Uses the same `assets/flame.png` that generates the launcher icon, so the
+/// icon on the home screen and the mark inside the app cannot drift apart.
 class FlameMark extends StatelessWidget {
   const FlameMark({super.key, this.size = 40, this.tile = true});
 
   final double size;
+
+  /// Whether to draw the dark rounded plate behind the flame. Off when the mark
+  /// sits on a surface that already provides its own contrast.
   final bool tile;
 
   @override
   Widget build(BuildContext context) {
-    final flame = SizedBox(
-      width: size * 0.56,
-      height: size * 0.56,
-      child: CustomPaint(painter: _FlamePainter()),
+    final flame = Image.asset(
+      'assets/flame.png',
+      width: size * (tile ? 0.62 : 1.0),
+      height: size * (tile ? 0.62 : 1.0),
+      filterQuality: FilterQuality.medium,
     );
     if (!tile) return flame;
+
     return Container(
       width: size,
       height: size,
       decoration: BoxDecoration(
-        color: const Color(0xFF121216),
+        color: const Color(0xFF0A0A0E),
         borderRadius: BorderRadius.circular(size * 0.28),
         border: Border.all(color: Ember.border),
         boxShadow: [
           BoxShadow(
-            color: Ember.flame.withValues(alpha: 0.22),
-            blurRadius: size * 0.35,
-            spreadRadius: -size * 0.08,
+            color: Ember.flame.withValues(alpha: 0.20),
+            blurRadius: size * 0.34,
+            spreadRadius: -size * 0.10,
           ),
         ],
       ),
@@ -38,52 +46,3 @@ class FlameMark extends StatelessWidget {
     );
   }
 }
-
-class _FlamePainter extends CustomPainter {
-  @override
-  void paint(Canvas canvas, Size s) {
-    final w = s.width, h = s.height;
-
-    // Outer flame: a teardrop with a curled left shoulder.
-    final outer = Path()
-      ..moveTo(w * 0.50, 0)
-      ..cubicTo(w * 0.86, h * 0.26, w * 1.00, h * 0.46, w * 0.94, h * 0.66)
-      ..cubicTo(w * 0.88, h * 0.89, w * 0.71, h * 1.00, w * 0.50, h * 1.00)
-      ..cubicTo(w * 0.29, h * 1.00, w * 0.12, h * 0.89, w * 0.06, h * 0.66)
-      ..cubicTo(w * 0.00, h * 0.44, w * 0.18, h * 0.30, w * 0.30, h * 0.14)
-      ..cubicTo(w * 0.34, h * 0.34, w * 0.42, h * 0.40, w * 0.46, h * 0.36)
-      ..cubicTo(w * 0.52, h * 0.30, w * 0.50, h * 0.14, w * 0.50, 0)
-      ..close();
-
-    canvas.drawPath(
-      outer,
-      Paint()
-        ..shader = const LinearGradient(
-          begin: Alignment.topCenter,
-          end: Alignment.bottomCenter,
-          colors: [Ember.flameSoft, Ember.flame],
-        ).createShader(Rect.fromLTWH(0, 0, w, h)),
-    );
-
-    // Inner core, brighter and offset low — what reads as heat.
-    final core = Path()
-      ..moveTo(w * 0.52, h * 0.42)
-      ..cubicTo(w * 0.72, h * 0.56, w * 0.74, h * 0.70, w * 0.62, h * 0.82)
-      ..cubicTo(w * 0.52, h * 0.92, w * 0.34, h * 0.88, w * 0.30, h * 0.74)
-      ..cubicTo(w * 0.27, h * 0.62, w * 0.38, h * 0.54, w * 0.52, h * 0.42)
-      ..close();
-
-    canvas.drawPath(
-      core,
-      Paint()
-        ..shader = const LinearGradient(
-          begin: Alignment.topCenter,
-          end: Alignment.bottomCenter,
-          colors: [Color(0xFFFFD68A), Ember.amber],
-        ).createShader(Rect.fromLTWH(0, h * 0.4, w, h * 0.6)),
-    );
-  }
-
-  @override
-  bool shouldRepaint(covariant CustomPainter old) => false;
-}