diff --git a/frontend/src/components/FloatingTranscriptDebug.vue b/frontend/src/components/FloatingTranscriptDebug.vue
index 4c5bb11..479cfe4 100644
--- a/frontend/src/components/FloatingTranscriptDebug.vue
+++ b/frontend/src/components/FloatingTranscriptDebug.vue
@@ -1,7 +1,7 @@
 <script setup lang="ts">
 import { ref, computed, watch, onMounted, onBeforeUnmount, nextTick } from 'vue'
 import { useTranscriptDebug } from '@/composables/transcript-debug'
-import { ChatContainer, AquaticBackground } from '@/components/transcript-debug'
+import { ChatContainer, AquaticBackground, AgentBadge } from '@/components/transcript-debug'
 import type { AgentName } from '@/types/transcript-debug'
 
 const props = defineProps<{
@@ -56,7 +56,7 @@ const isFocusWithin = ref(false)
 
 const showChrome = computed(() =>
   isHovered.value || isFocusWithin.value || isDragging.value ||
-  isResizing.value || showSelector.value || isDraggingSheet.value
+  isResizing.value || showSelector.value
 )
 
 // ============================================================================
@@ -78,21 +78,41 @@ const zoom = ref(1)
 
 // Size mode: pin (small, anchored to FAB), medium (default), large
 type SizeMode = 'pin' | 'medium' | 'large'
-const sizeMode = ref<SizeMode>('medium')
+const savedSize = localStorage.getItem('transcript-size-mode') as SizeMode | null
+const sizeMode = ref<SizeMode>(savedSize && ['pin', 'medium', 'large'].includes(savedSize) ? savedSize : 'medium')
+
+// Force mobile (bottom sheet) mode on desktop
+const forceMobile = ref(false)
+const effectiveMobile = computed(() => isMobile.value || forceMobile.value)
+
+function toggleForceMobile() {
+  if (isMobile.value) return // already native mobile
+  forceMobile.value = !forceMobile.value
+  if (forceMobile.value) {
+    // Enter mobile: set sheet height based on current sizeMode
+    const mobileSnaps: Record<SizeMode, number> = { pin: 20, medium: 55, large: 100 }
+    sheetHeight.value = mobileSnaps[sizeMode.value]
+    hasCustomPosition.value = false
+  }
+}
 
 function cycleSizeMode() {
   const modes: SizeMode[] = ['pin', 'medium', 'large']
   const i = modes.indexOf(sizeMode.value)
   sizeMode.value = modes[(i + 1) % modes.length]
+  localStorage.setItem('transcript-size-mode', sizeMode.value)
   hasCustomPosition.value = false
+
+  // In mobile mode, also update sheet height
+  if (effectiveMobile.value) {
+    const mobileSnaps: Record<SizeMode, number> = { pin: 20, medium: 55, large: 100 }
+    sheetHeight.value = mobileSnaps[sizeMode.value]
+  }
 }
 
 // Mobile bottom sheet state
 const isMobile = ref(false)
 const sheetHeight = ref(55)
-const isDraggingSheet = ref(false)
-const sheetDragStart = ref({ y: 0, height: 0 })
-const snapPoints = [20, 55, 85]
 
 // ============================================================================
 // MOBILE DETECTION
@@ -104,78 +124,29 @@ function checkMobile() {
   isMobile.value = isTouchDevice && isSmallScreen
 }
 
-function findNearestSnap(height: number): number {
-  return snapPoints.reduce((prev, curr) =>
-    Math.abs(curr - height) < Math.abs(prev - height) ? curr : prev
-  )
-}
-
-// ============================================================================
-// MOBILE SHEET DRAG
-// ============================================================================
-
-function startSheetDrag(e: TouchEvent) {
-  if (!isMobile.value) return
-  const touch = e.touches[0]
-  if (!touch) return
-  isDraggingSheet.value = true
-  sheetDragStart.value = { y: touch.clientY, height: sheetHeight.value }
-}
-
-function onSheetDrag(e: TouchEvent) {
-  if (!isDraggingSheet.value || !isMobile.value) return
-  const touch = e.touches[0]
-  if (!touch) return
-  const deltaY = sheetDragStart.value.y - touch.clientY
-  const deltaPercent = (deltaY / window.innerHeight) * 100
-  sheetHeight.value = Math.max(15, Math.min(90, sheetDragStart.value.height + deltaPercent))
-}
-
-function stopSheetDrag() {
-  if (!isDraggingSheet.value) return
-  isDraggingSheet.value = false
-  sheetHeight.value = findNearestSnap(sheetHeight.value)
-}
 
 // ============================================================================
 // WINDOW DRAG
 // ============================================================================
 
-function startDrag(e: MouseEvent | TouchEvent) {
-  if ((e.target as HTMLElement).closest('.window-controls')) return
-  if ((e.target as HTMLElement).closest('.header-selector')) return
-
-  if (isMobile.value) {
-    if (e instanceof TouchEvent) startSheetDrag(e)
-    return
-  }
+function startDrag(e: MouseEvent) {
+  if (effectiveMobile.value) return
 
   isDragging.value = true
   const rect = windowRef.value?.getBoundingClientRect()
-  const touch = e instanceof TouchEvent ? e.touches[0] : null
-  const clientX = e instanceof MouseEvent ? e.clientX : (touch?.clientX ?? 0)
-  const clientY = e instanceof MouseEvent ? e.clientY : (touch?.clientY ?? 0)
-
   if (rect) {
     if (!hasCustomPosition.value) {
       position.value = { x: rect.left, y: rect.top }
     }
-    dragOffset.value = { x: clientX - rect.left, y: clientY - rect.top }
+    dragOffset.value = { x: e.clientX - rect.left, y: e.clientY - rect.top }
   }
 
   document.addEventListener('mousemove', onDrag)
   document.addEventListener('mouseup', stopDrag)
-  document.addEventListener('touchmove', onDrag, { passive: false })
-  document.addEventListener('touchend', stopDrag)
 }
 
-function onDrag(e: MouseEvent | TouchEvent) {
+function onDrag(e: MouseEvent) {
   if (!isDragging.value) return
-  if (e instanceof TouchEvent) e.preventDefault()
-
-  const touch = e instanceof TouchEvent ? e.touches[0] : null
-  const clientX = e instanceof MouseEvent ? e.clientX : (touch?.clientX ?? 0)
-  const clientY = e instanceof MouseEvent ? e.clientY : (touch?.clientY ?? 0)
 
   const w = windowRef.value?.offsetWidth || 480
   const h = windowRef.value?.offsetHeight || 600
@@ -185,8 +156,8 @@ function onDrag(e: MouseEvent | TouchEvent) {
   const maxY = window.innerHeight - h * 0.25
 
   position.value = {
-    x: Math.max(minX, Math.min(clientX - dragOffset.value.x, maxX)),
-    y: Math.max(minY, Math.min(clientY - dragOffset.value.y, maxY))
+    x: Math.max(minX, Math.min(e.clientX - dragOffset.value.x, maxX)),
+    y: Math.max(minY, Math.min(e.clientY - dragOffset.value.y, maxY))
   }
 }
 
@@ -195,8 +166,6 @@ function stopDrag() {
   hasCustomPosition.value = true
   document.removeEventListener('mousemove', onDrag)
   document.removeEventListener('mouseup', stopDrag)
-  document.removeEventListener('touchmove', onDrag)
-  document.removeEventListener('touchend', stopDrag)
 }
 
 // ============================================================================
@@ -239,16 +208,25 @@ const sizeModePresets: Record<SizeMode, { w: number; h: number }> = {
 }
 
 const windowStyle = computed((): Record<string, string> => {
-  if (isMobile.value) {
-    return {
+  if (effectiveMobile.value) {
+    const isFullScreen = sheetHeight.value >= 100
+    const style: Record<string, string> = {
       position: 'fixed',
       left: '0',
       right: '0',
       bottom: '0',
       width: '100%',
-      height: `${sheetHeight.value}vh`,
-      maxHeight: '90vh'
     }
+    if (isFullScreen) {
+      // Full height but respect app header
+      const headerEl = document.querySelector('.app-header') as HTMLElement | null
+      const headerH = headerEl ? headerEl.offsetHeight : 40
+      style.top = `${headerH}px`
+      style.height = 'auto'
+    } else {
+      style.height = `${sheetHeight.value}dvh`
+    }
+    return style
   }
 
   const preset = sizeModePresets[sizeMode.value]
@@ -306,7 +284,7 @@ function close() {
 }
 
 function openAtCursor(x: number, y: number) {
-  if (isMobile.value) {
+  if (effectiveMobile.value) {
     isOpen.value = !isOpen.value
     return
   }
@@ -399,8 +377,6 @@ onBeforeUnmount(() => {
   document.removeEventListener('keydown', handleZoomKey)
   document.removeEventListener('mousemove', onDrag)
   document.removeEventListener('mouseup', stopDrag)
-  document.removeEventListener('touchmove', onDrag)
-  document.removeEventListener('touchend', stopDrag)
   document.removeEventListener('mousemove', onResize)
   document.removeEventListener('mouseup', stopResize)
   window.removeEventListener('resize', checkMobile)
@@ -417,8 +393,7 @@ onBeforeUnmount(() => {
         :class="{
           dragging: isDragging,
           resizing: isResizing,
-          mobile: isMobile,
-          'sheet-dragging': isDraggingSheet,
+          mobile: effectiveMobile,
           'chrome-visible': showChrome,
           'selector-open': showSelector
         }"
@@ -429,34 +404,33 @@ onBeforeUnmount(() => {
         @focusout="isFocusWithin = false"
       >
         <div class="glass" :style="{ zoom: zoom !== 1 ? zoom : undefined }">
-          <!-- Mobile drag handle -->
+          <!-- Thin drag edge (replaces full titlebar drag) -->
           <div
-            v-if="isMobile"
-            class="sheet-handle"
-            @touchstart.passive="startSheetDrag"
-            @touchmove.prevent="onSheetDrag"
-            @touchend="stopSheetDrag"
-          >
-            <div class="handle-bar"></div>
-          </div>
+            v-if="!effectiveMobile"
+            class="drag-edge"
+            @mousedown="startDrag"
+          ></div>
 
           <!-- Titlebar -->
-          <div
-            class="titlebar"
-            @mousedown="startDrag"
-            @touchstart.passive="startDrag"
-            @touchmove="onSheetDrag"
-            @touchend="stopSheetDrag"
-          >
+          <div class="titlebar">
             <div class="left">
-              <svg class="title-icon" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
-                <path d="M21 15a2 2 0 0 1-2 2H7l-4 4V5a2 2 0 0 1 2-2h14a2 2 0 0 1 2 2z"/>
-              </svg>
-              <span class="title-label">Transcript</span>
-              <i class="dot" :class="{ on: isRealtime }"></i>
-              <span v-if="selectedAgent" class="agent-badge">{{ selectedAgent }}</span>
+              <AgentBadge v-if="selectedAgent" :agent="selectedAgent" :connected="isRealtime" />
             </div>
             <div class="window-controls">
+              <button
+                v-if="!isMobile"
+                @click.stop="toggleForceMobile"
+                class="mobile-btn"
+                :class="{ active: forceMobile }"
+                title="Toggle mobile panel"
+              >
+                <!-- Phone/panel-from-bottom icon -->
+                <svg width="10" height="10" viewBox="0 0 10 10" shape-rendering="crispEdges">
+                  <rect x="2" y="0" width="6" height="10" fill="currentColor" opacity="0.25"/>
+                  <rect x="3" y="1" width="4" height="7" fill="currentColor"/>
+                  <rect x="4" y="9" width="2" height="1" fill="currentColor" opacity="0.5"/>
+                </svg>
+              </button>
               <button @click.stop="cycleSizeMode" class="size-btn" :title="`Size: ${sizeMode}`">
                 <!-- Pin icon: small square bottom-left -->
                 <svg v-if="sizeMode === 'pin'" width="10" height="10" viewBox="0 0 10 10" shape-rendering="crispEdges">
@@ -531,7 +505,7 @@ onBeforeUnmount(() => {
           </div>
 
           <!-- Resize handle -->
-          <div v-if="!isMobile" class="resize-handle" @mousedown="startResize"></div>
+          <div v-if="!effectiveMobile" class="resize-handle" @mousedown="startResize"></div>
         </div>
       </div>
     </Transition>
@@ -615,6 +589,11 @@ onBeforeUnmount(() => {
   transition: opacity 0.35s ease, max-height 0.35s ease, padding 0.35s ease;
 }
 
+/* Idle: hide drag edge */
+.aero-win:not(.chrome-visible) .drag-edge {
+  pointer-events: none;
+}
+
 /* Idle: slide titlebar up and fade out */
 .aero-win:not(.chrome-visible) .titlebar {
   opacity: 0;
@@ -704,6 +683,25 @@ onBeforeUnmount(() => {
   transition: opacity 0.35s ease, transform 0.35s ease !important;
 }
 
+/* ── Drag edge: thin strip at top for window dragging ── */
+.drag-edge {
+  position: absolute;
+  top: 0;
+  left: 0;
+  right: 0;
+  height: 5px;
+  z-index: 11;
+  cursor: grab;
+}
+
+.drag-edge:active {
+  cursor: grabbing;
+}
+
+.aero-win.dragging .drag-edge {
+  cursor: grabbing;
+}
+
 /* ── Titlebar: absolute overlay at top of .glass ── */
 .titlebar {
   position: absolute;
@@ -723,13 +721,10 @@ onBeforeUnmount(() => {
   backdrop-filter: blur(8px);
   -webkit-backdrop-filter: blur(8px);
   border-bottom: 1px solid rgba(255,255,255,0.04);
-  cursor: grab;
   user-select: none;
   transition: opacity 0.35s ease, transform 0.35s ease;
 }
 
-.aero-win.dragging .titlebar { cursor: grabbing; }
-
 .left {
   display: flex;
   align-items: center;
@@ -738,48 +733,6 @@ onBeforeUnmount(() => {
   font: 500 10px/1 'Courier New', monospace;
 }
 
-.title-icon {
-  opacity: 0.4;
-  flex-shrink: 0;
-  color: rgba(255,255,255,0.4);
-}
-
-.title-label {
-  font-weight: 700;
-  font-size: 10px;
-  color: #818cf8;
-  letter-spacing: 1px;
-  text-transform: uppercase;
-  font-family: 'Courier New', monospace;
-  /* No gradient - pixel art aesthetic = flat color */
-  -webkit-text-fill-color: #818cf8;
-}
-
-.dot {
-  width: 4px;
-  height: 4px;
-  border-radius: 0;
-  background: #444;
-}
-
-.dot.on {
-  background: #22c55e;
-  box-shadow: 0 0 6px #22c55e;
-}
-
-.agent-badge {
-  font-size: 8px;
-  font-weight: 700;
-  font-family: 'Courier New', monospace;
-  padding: 1px 4px;
-  border-radius: 0;
-  border: 1px solid rgba(99, 102, 241, 0.3);
-  background: rgba(99, 102, 241, 0.12);
-  color: #a5b4fc;
-  text-transform: uppercase;
-  letter-spacing: 0.5px;
-}
-
 .window-controls {
   display: flex;
   gap: 2px;
@@ -810,6 +763,22 @@ onBeforeUnmount(() => {
   color: #a5b4fc;
 }
 
+.window-controls .mobile-btn {
+  color: #a78bfa;
+}
+
+.window-controls .mobile-btn:hover {
+  color: #c4b5fd;
+  background: rgba(167, 139, 250, 0.15);
+  border-color: rgba(167, 139, 250, 0.25);
+}
+
+.window-controls .mobile-btn.active {
+  background: rgba(167, 139, 250, 0.2);
+  border-color: rgba(167, 139, 250, 0.3);
+  color: #c4b5fd;
+}
+
 .window-controls .size-btn {
   color: #0ea5e9;
 }
@@ -1181,40 +1150,11 @@ onBeforeUnmount(() => {
   transition: height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
-.aero-win.mobile.sheet-dragging {
-  transition: none;
-}
-
 .aero-win.mobile .glass {
   border-radius: 16px 16px 0 0;
   padding-bottom: env(safe-area-inset-bottom, 0);
 }
 
-.sheet-handle {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  height: 24px;
-  cursor: grab;
-  touch-action: none;
-  background: rgba(255,255,255,0.02);
-}
-
-.sheet-handle:active {
-  cursor: grabbing;
-}
-
-.handle-bar {
-  width: 36px;
-  height: 4px;
-  background: rgba(255,255,255,0.12);
-  border-radius: 0;
-}
-
-.aero-win.mobile .titlebar {
-  cursor: grab;
-  touch-action: none;
-}
 
 .aero-win.mobile .resize-handle {
   display: none;
@@ -1227,9 +1167,17 @@ onBeforeUnmount(() => {
   overflow: hidden;
 }
 
+.aero-win.mobile.win-slide-enter-active {
+  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
+}
+
+.aero-win.mobile.win-slide-leave-active {
+  transition: transform 0.25s cubic-bezier(0.4, 0, 1, 1) !important;
+}
+
 .aero-win.mobile.win-slide-enter-from,
 .aero-win.mobile.win-slide-leave-to {
-  transform: translateY(100%);
-  opacity: 1;
+  transform: translateY(100%) !important;
+  opacity: 1 !important;
 }
 </style>
diff --git a/frontend/src/components/transcript-debug/AgentBadge.vue b/frontend/src/components/transcript-debug/AgentBadge.vue
new file mode 100644
index 0000000..b179b17
--- /dev/null
+++ b/frontend/src/components/transcript-debug/AgentBadge.vue
@@ -0,0 +1,141 @@
+<script setup lang="ts">
+import { ref, onMounted, onBeforeUnmount } from 'vue'
+
+defineProps<{
+  agent: string
+  connected: boolean
+}>()
+
+const isOpen = ref(false)
+const wrapperRef = ref<HTMLElement | null>(null)
+
+function toggle(e: Event) {
+  e.stopPropagation()
+  isOpen.value = !isOpen.value
+}
+
+function onClickOutside(e: MouseEvent) {
+  if (!isOpen.value) return
+  if (wrapperRef.value && !wrapperRef.value.contains(e.target as Node)) {
+    isOpen.value = false
+  }
+}
+
+onMounted(() => document.addEventListener('mousedown', onClickOutside))
+onBeforeUnmount(() => document.removeEventListener('mousedown', onClickOutside))
+</script>
+
+<template>
+  <div ref="wrapperRef" class="agent-badge-wrapper" :class="{ connected }" @click="toggle">
+    <span class="agent-label">{{ agent }}</span>
+    <svg class="caret" :class="{ open: isOpen }" width="6" height="6" viewBox="0 0 6 6" shape-rendering="crispEdges">
+      <rect x="2" y="4" width="2" height="2" fill="currentColor"/>
+      <rect x="0" y="2" width="2" height="2" fill="currentColor"/>
+      <rect x="4" y="2" width="2" height="2" fill="currentColor"/>
+    </svg>
+    <Transition name="dropdown">
+      <div v-if="isOpen" class="dropdown">
+        <div class="dropdown-item todo">TODO</div>
+      </div>
+    </Transition>
+  </div>
+</template>
+
+<style scoped>
+.agent-badge-wrapper {
+  position: relative;
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+  cursor: pointer;
+  user-select: none;
+  padding: 3px 7px;
+  border: 1px solid rgba(99, 102, 241, 0.3);
+  background: rgba(99, 102, 241, 0.12);
+  transition: background 0.15s, border-color 0.15s, box-shadow 0.2s;
+}
+
+.agent-badge-wrapper:hover {
+  background: rgba(99, 102, 241, 0.2);
+  border-color: rgba(99, 102, 241, 0.4);
+}
+
+.agent-badge-wrapper.connected {
+  border-color: rgba(34, 197, 94, 0.35);
+  background: rgba(34, 197, 94, 0.08);
+  box-shadow: 0 0 8px rgba(34, 197, 94, 0.15);
+}
+
+.agent-badge-wrapper.connected:hover {
+  background: rgba(34, 197, 94, 0.15);
+  border-color: rgba(34, 197, 94, 0.5);
+}
+
+.agent-label {
+  font-size: 10px;
+  font-weight: 700;
+  font-family: 'Courier New', monospace;
+  color: #a5b4fc;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+}
+
+.connected .agent-label {
+  color: #86efac;
+}
+
+.caret {
+  color: rgba(165, 180, 252, 0.5);
+  transition: transform 0.2s ease;
+}
+
+.connected .caret {
+  color: rgba(134, 239, 172, 0.5);
+}
+
+.caret.open {
+  transform: rotate(180deg);
+}
+
+.dropdown {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  min-width: 120px;
+  background: rgba(8, 8, 18, 0.95);
+  backdrop-filter: blur(12px);
+  -webkit-backdrop-filter: blur(12px);
+  border: 1px solid rgba(99, 102, 241, 0.2);
+  z-index: 100;
+  padding: 4px 0;
+}
+
+.dropdown-item {
+  padding: 5px 10px;
+  font-size: 9px;
+  font-family: 'Courier New', monospace;
+  color: rgba(255, 255, 255, 0.5);
+  letter-spacing: 0.5px;
+  text-transform: uppercase;
+}
+
+.dropdown-item.todo {
+  color: rgba(255, 255, 255, 0.25);
+  font-style: italic;
+}
+
+/* Transition */
+.dropdown-enter-active {
+  transition: opacity 0.15s ease, transform 0.15s ease;
+}
+
+.dropdown-leave-active {
+  transition: opacity 0.1s ease, transform 0.1s ease;
+}
+
+.dropdown-enter-from,
+.dropdown-leave-to {
+  opacity: 0;
+  transform: translateY(-4px);
+}
+</style>
diff --git a/frontend/src/components/transcript-debug/index.ts b/frontend/src/components/transcript-debug/index.ts
index be12e57..39a3bb2 100644
--- a/frontend/src/components/transcript-debug/index.ts
+++ b/frontend/src/components/transcript-debug/index.ts
@@ -12,4 +12,5 @@ export { default as UserInput } from './UserInput.vue'
 export { default as PermissionApproval } from './PermissionApproval.vue'
 export { default as PlanApproval } from './PlanApproval.vue'
 export { default as CodeBlock } from './CodeBlock.vue'
+export { default as AgentBadge } from './AgentBadge.vue'
 export { AquaticBackground } from './aquaticBackground'