feat(app): add maestro tests, download progress, and task hierarchy

Add Maestro E2E test flows for app launch and sidebar interactions. Implement download progress tracking with speed/ETA display in file explorer. Extend task CLI with parent-child hierarchy, body content from stdin, and ancestor context in task show. Fix explorer sidebar gesture to allow horizontal scrolling while preserving close swipe. Replace hardcoded monospace font with Fonts.mono constant. Fix RefreshControl to only show spinner on manual pull-to-refresh.

packages/app/maestro/flows/launch.yaml

@@ -0,0 +1,26 @@
+appId: com.moboudra.paseo
+---
+# Reusable flow to handle dev client screens after launchApp
+# Works with both release builds (no-ops) and dev builds
+
+# Handle dev launcher - tap localhost server (dev builds only)
+- tapOn:
+    text: ".*localhost.*"
+    optional: true
+
+# Dismiss dev menu intro modal
+- runFlow:
+    when:
+      visible: "Continue"
+    commands:
+      - tapOn: "Continue"
+
+# Dismiss dev menu if it opens
+- runFlow:
+    when:
+      visible: "Go home"
+    commands:
+      - tapOn:
+          point: "50%,20%"
+
+- assertVisible: "New Agent"

packages/app/maestro/poc.yaml

@@ -0,0 +1,11 @@
+appId: com.moboudra.paseo
+---
+- launchApp:
+    clearState: true
+- runFlow: flows/launch.yaml
+- takeScreenshot: app-launched
+- swipe:
+    direction: RIGHT
+    duration: 300
+- assertVisible: "Settings"
+- tapOn: "Settings"

packages/app/maestro/sidebar-swipe-bug.yaml

@@ -0,0 +1,74 @@
+appId: com.moboudra.paseo
+---
+- launchApp:
+    clearState: true
+- runFlow: flows/launch.yaml
+
+# Open left sidebar
+- swipe:
+    direction: RIGHT
+    duration: 300
+
+# Tap on an agent conversation
+- assertVisible:
+    text: ".*Build Production APK.*"
+- tapOn:
+    text: ".*Build Production APK.*"
+
+# Wait for chat to load
+- assertVisible: "Message agent..."
+
+# Swipe right-to-left to reveal git diff sidebar
+- swipe:
+    direction: LEFT
+    duration: 300
+
+# Assert diff sidebar is visible
+- assertVisible: "Changes"
+- assertVisible: "Files"
+- takeScreenshot: 01-diff-sidebar-open
+
+# TEST 1: Scroll diff vertically down (should work)
+# Tap on Files tab to switch, then back to Changes - proves interaction works
+- tapOn: "Files"
+- assertVisible: "Files"
+- tapOn: "Changes"
+- assertVisible: "Changes"
+- takeScreenshot: 02-tabs-work
+
+# TEST 2: Scroll diff content vertically (should work)
+- swipe:
+    start: "50%,70%"
+    end: "50%,30%"
+    duration: 300
+- assertVisible: "Changes"
+- takeScreenshot: 03-after-vertical-scroll
+
+# TEST 3: Scroll diff horizontally to the right (should work)
+- swipe:
+    start: "80%,50%"
+    end: "20%,50%"
+    duration: 300
+- assertVisible: "Changes"
+- takeScreenshot: 04-after-horizontal-scroll-right
+
+# TEST 4: Scroll diff back to left edge (scrollLeft = 0)
+- swipe:
+    start: "20%,50%"
+    end: "80%,50%"
+    duration: 300
+- swipe:
+    start: "20%,50%"
+    end: "80%,50%"
+    duration: 300
+- assertVisible: "Changes"
+- takeScreenshot: 05-back-at-left-edge
+
+# TEST 5 (BUG): At scrollLeft 0, swipe right should close sidebar
+# Currently fails - the gesture bounces the scrollview instead
+- swipe:
+    start: "10%,50%"
+    end: "90%,50%"
+    duration: 300
+- assertVisible: "Message agent..."
+- takeScreenshot: 06-sidebar-closed