diff --git a/src/App.vue b/src/App.vue
index 40da2e2a8..46fa6784a 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -28,7 +28,7 @@ const handleKey = (e: KeyboardEvent) => {
 useEventListener(window, 'keydown', handleKey)
 useEventListener(window, 'keyup', handleKey)
 
-const showContextMenu = (event: PointerEvent) => {
+const showContextMenu = (event: MouseEvent) => {
   const { target } = event
   switch (true) {
     case target instanceof HTMLTextAreaElement:
diff --git a/src/components/actionbar/ComfyQueueButton.vue b/src/components/actionbar/ComfyQueueButton.vue
index 35aa8f3ae..e23243c13 100644
--- a/src/components/actionbar/ComfyQueueButton.vue
+++ b/src/components/actionbar/ComfyQueueButton.vue
@@ -135,8 +135,11 @@ const hasPendingTasks = computed(
 )
 
 const commandStore = useCommandStore()
-const queuePrompt = (e: MouseEvent) => {
-  const commandId = e.shiftKey ? 'Comfy.QueuePromptFront' : 'Comfy.QueuePrompt'
+const queuePrompt = (e: Event) => {
+  const commandId =
+    'shiftKey' in e && e.shiftKey
+      ? 'Comfy.QueuePromptFront'
+      : 'Comfy.QueuePrompt'
   commandStore.execute(commandId)
 }
 </script>
diff --git a/src/components/bottomPanel/tabs/terminal/BaseTerminal.vue b/src/components/bottomPanel/tabs/terminal/BaseTerminal.vue
index 0dd2b5985..b92dcc7ac 100644
--- a/src/components/bottomPanel/tabs/terminal/BaseTerminal.vue
+++ b/src/components/bottomPanel/tabs/terminal/BaseTerminal.vue
@@ -12,11 +12,11 @@ import { Ref, onUnmounted, ref } from 'vue'
 import { useTerminal } from '@/composables/bottomPanelTabs/useTerminal'
 
 const emit = defineEmits<{
-  created: [ReturnType<typeof useTerminal>, Ref<HTMLElement>]
+  created: [ReturnType<typeof useTerminal>, Ref<HTMLElement | undefined>]
   unmounted: []
 }>()
-const terminalEl = ref<HTMLElement>()
-const rootEl = ref<HTMLElement>()
+const terminalEl = ref<HTMLElement | undefined>()
+const rootEl = ref<HTMLElement | undefined>()
 emit('created', useTerminal(terminalEl), rootEl)
 
 onUnmounted(() => emit('unmounted'))
diff --git a/src/components/bottomPanel/tabs/terminal/CommandTerminal.vue b/src/components/bottomPanel/tabs/terminal/CommandTerminal.vue
index 527c5d40b..6950ca892 100644
--- a/src/components/bottomPanel/tabs/terminal/CommandTerminal.vue
+++ b/src/components/bottomPanel/tabs/terminal/CommandTerminal.vue
@@ -13,7 +13,7 @@ import BaseTerminal from './BaseTerminal.vue'
 
 const terminalCreated = (
   { terminal, useAutoSize }: ReturnType<typeof useTerminal>,
-  root: Ref<HTMLElement>
+  root: Ref<HTMLElement | undefined>
 ) => {
   const terminalApi = electronAPI().Terminal
 
diff --git a/src/components/bottomPanel/tabs/terminal/LogsTerminal.vue b/src/components/bottomPanel/tabs/terminal/LogsTerminal.vue
index f8fe342c2..5d17ec326 100644
--- a/src/components/bottomPanel/tabs/terminal/LogsTerminal.vue
+++ b/src/components/bottomPanel/tabs/terminal/LogsTerminal.vue
@@ -27,7 +27,7 @@ const loading = ref(true)
 
 const terminalCreated = (
   { terminal, useAutoSize }: ReturnType<typeof useTerminal>,
-  root: Ref<HTMLElement>
+  root: Ref<HTMLElement | undefined>
 ) => {
   // `autoCols` is false because we don't want the progress bar in the terminal
   // to render incorrectly as the progress bar is rendered based on the
diff --git a/src/components/common/DeviceInfo.vue b/src/components/common/DeviceInfo.vue
index 5f81cefaf..c4164a9a5 100644
--- a/src/components/common/DeviceInfo.vue
+++ b/src/components/common/DeviceInfo.vue
@@ -2,7 +2,9 @@
   <div class="grid grid-cols-2 gap-2">
     <template v-for="col in deviceColumns" :key="col.field">
       <div class="font-medium">{{ col.header }}</div>
-      <div>{{ formatValue(props.device[col.field], col.field) }}</div>
+      <div>
+        {{ formatValue(props.device[col.field], col.field) }}
+      </div>
     </template>
   </div>
 </template>
@@ -15,7 +17,7 @@ const props = defineProps<{
   device: DeviceStats
 }>()
 
-const deviceColumns = [
+const deviceColumns: { field: keyof DeviceStats; header: string }[] = [
   { field: 'name', header: 'Name' },
   { field: 'type', header: 'Type' },
   { field: 'vram_total', header: 'VRAM Total' },
diff --git a/src/components/common/EditableText.vue b/src/components/common/EditableText.vue
index affdd22f7..2f253a945 100644
--- a/src/components/common/EditableText.vue
+++ b/src/components/common/EditableText.vue
@@ -38,9 +38,10 @@ const props = withDefaults(defineProps<EditableTextProps>(), {
 
 const emit = defineEmits(['update:modelValue', 'edit'])
 const inputValue = ref<string>(props.modelValue)
-const inputRef = ref(null)
+const inputRef = ref<InstanceType<typeof InputText> | undefined>()
 
 const blurInputElement = () => {
+  // @ts-expect-error - $el is an internal property of the InputText component
   inputRef.value?.$el.blur()
 }
 const finishEditing = () => {
@@ -58,6 +59,7 @@ watch(
           : inputValue.value
         const start = 0
         const end = fileName.length
+        // @ts-expect-error - $el is an internal property of the InputText component
         const inputElement = inputRef.value.$el
         inputElement.setSelectionRange?.(start, end)
       })
diff --git a/src/components/common/FormItem.vue b/src/components/common/FormItem.vue
index 7acca557a..724c2a15c 100644
--- a/src/components/common/FormItem.vue
+++ b/src/components/common/FormItem.vue
@@ -72,7 +72,7 @@ function getFormAttrs(item: FormItem) {
             item.options(formValue.value)
           : item.options
 
-      if (typeof item.options[0] !== 'string') {
+      if (typeof item.options?.[0] !== 'string') {
         attrs['optionLabel'] = 'text'
         attrs['optionValue'] = 'value'
       }
diff --git a/src/components/common/InputKnob.vue b/src/components/common/InputKnob.vue
index 60d0ce0cc..eecb9e957 100644
--- a/src/components/common/InputKnob.vue
+++ b/src/components/common/InputKnob.vue
@@ -76,7 +76,7 @@ const updateValue = (newValue: number | null) => {
 
 const displayValue = (value: number): string => {
   updateValue(value)
-  const stepString = props.step.toString()
+  const stepString = (props.step ?? 1).toString()
   const resolution = stepString.includes('.')
     ? stepString.split('.')[1].length
     : 0
diff --git a/src/components/common/InputSlider.vue b/src/components/common/InputSlider.vue
index 4a1284967..face9bcc1 100644
--- a/src/components/common/InputSlider.vue
+++ b/src/components/common/InputSlider.vue
@@ -2,7 +2,7 @@
   <div class="input-slider flex flex-row items-center gap-2">
     <Slider
       :modelValue="modelValue"
-      @update:modelValue="updateValue"
+      @update:modelValue="(value) => updateValue(value as number)"
       class="slider-part"
       :class="sliderClass"
       :min="min"
diff --git a/src/components/common/SystemStatsPanel.vue b/src/components/common/SystemStatsPanel.vue
index 2973dc940..480da90f3 100644
--- a/src/components/common/SystemStatsPanel.vue
+++ b/src/components/common/SystemStatsPanel.vue
@@ -48,15 +48,16 @@ const systemInfo = computed(() => ({
   argv: props.stats.system.argv.join(' ')
 }))
 
-const systemColumns = [
-  { field: 'os', header: 'OS' },
-  { field: 'python_version', header: 'Python Version' },
-  { field: 'embedded_python', header: 'Embedded Python' },
-  { field: 'pytorch_version', header: 'Pytorch Version' },
-  { field: 'argv', header: 'Arguments' },
-  { field: 'ram_total', header: 'RAM Total' },
-  { field: 'ram_free', header: 'RAM Free' }
-]
+const systemColumns: { field: keyof SystemStats['system']; header: string }[] =
+  [
+    { field: 'os', header: 'OS' },
+    { field: 'python_version', header: 'Python Version' },
+    { field: 'embedded_python', header: 'Embedded Python' },
+    { field: 'pytorch_version', header: 'Pytorch Version' },
+    { field: 'argv', header: 'Arguments' },
+    { field: 'ram_total', header: 'RAM Total' },
+    { field: 'ram_free', header: 'RAM Free' }
+  ]
 
 const formatValue = (value: any, field: string) => {
   if (['ram_total', 'ram_free'].includes(field)) {
diff --git a/src/components/common/TreeExplorer.vue b/src/components/common/TreeExplorer.vue
index 8e34a05c6..5ef0f891e 100644
--- a/src/components/common/TreeExplorer.vue
+++ b/src/components/common/TreeExplorer.vue
@@ -53,7 +53,9 @@ import {
 } from '@/types/treeExplorerTypes'
 import { combineTrees, findNodeByKey } from '@/utils/treeUtil'
 
-const expandedKeys = defineModel<Record<string, boolean>>('expandedKeys')
+const expandedKeys = defineModel<Record<string, boolean>>('expandedKeys', {
+  required: true
+})
 provide(InjectKeyExpandedKeys, expandedKeys)
 const selectionKeys = defineModel<Record<string, boolean>>('selectionKeys')
 // Tracks whether the caller has set the selectionKeys model.
@@ -103,7 +105,7 @@ const getTreeNodeIcon = (node: TreeExplorerNode) => {
   return isExpanded ? 'pi pi-folder-open' : 'pi pi-folder'
 }
 const fillNodeInfo = (node: TreeExplorerNode): RenderedTreeExplorerNode => {
-  const children = node.children?.map(fillNodeInfo)
+  const children = node.children?.map(fillNodeInfo) ?? []
   const totalLeaves = node.leaf
     ? 1
     : children.reduce((acc, child) => acc + child.totalLeaves, 0)
@@ -113,7 +115,7 @@ const fillNodeInfo = (node: TreeExplorerNode): RenderedTreeExplorerNode => {
     children,
     type: node.leaf ? 'node' : 'folder',
     totalLeaves,
-    badgeText: node.getBadgeText ? node.getBadgeText() : null,
+    badgeText: node.getBadgeText ? node.getBadgeText() : undefined,
     isEditingLabel: node.key === renameEditingNode.value?.key
   }
 }
@@ -149,7 +151,7 @@ const handleNodeLabelEdit = async (
       if (node.key === newFolderNode.value?.key) {
         await handleFolderCreation(newName)
       } else {
-        await node.handleRename(newName)
+        await node.handleRename?.(newName)
       }
     },
     node.handleError,
diff --git a/src/components/common/TreeExplorerTreeNode.vue b/src/components/common/TreeExplorerTreeNode.vue
index 4da9a0d34..a8987c566 100644
--- a/src/components/common/TreeExplorerTreeNode.vue
+++ b/src/components/common/TreeExplorerTreeNode.vue
@@ -76,10 +76,10 @@ const nodeBadgeText = computed<string>(() => {
 })
 const showNodeBadgeText = computed<boolean>(() => nodeBadgeText.value !== '')
 
-const isEditing = computed<boolean>(() => props.node.isEditingLabel)
+const isEditing = computed<boolean>(() => props.node.isEditingLabel ?? false)
 const handleEditLabel = inject(InjectKeyHandleEditLabelFunction)
 const handleRename = (newName: string) => {
-  handleEditLabel(props.node, newName)
+  handleEditLabel?.(props.node, newName)
 }
 
 const container = ref<HTMLElement | null>(null)
@@ -102,7 +102,7 @@ if (props.node.draggable) {
       ? ({ nativeSetDragImage }) => {
           setCustomNativeDragPreview({
             render: ({ container }) => {
-              return props.node.renderDragPreview(container)
+              return props.node.renderDragPreview?.(container)
             },
             nativeSetDragImage
           })
diff --git a/src/components/sidebar/tabs/WorkflowsSidebarTab.vue b/src/components/sidebar/tabs/WorkflowsSidebarTab.vue
index 428c113a7..c019e4afc 100644
--- a/src/components/sidebar/tabs/WorkflowsSidebarTab.vue
+++ b/src/components/sidebar/tabs/WorkflowsSidebarTab.vue
@@ -34,6 +34,7 @@
           <TreeExplorer
             :root="renderTreeNode(openWorkflowsTree, WorkflowTreeType.Open)"
             :selectionKeys="selectionKeys"
+            v-model:expandedKeys="dummyExpandedKeys"
           >
             <template #node="{ node }">
               <TreeExplorerTreeNode :node="node">
@@ -75,6 +76,7 @@
               )
             "
             :selectionKeys="selectionKeys"
+            v-model:expandedKeys="dummyExpandedKeys"
           >
             <template #node="{ node }">
               <WorkflowTreeLeaf :node="node" />
@@ -179,6 +181,7 @@ const workspaceStore = useWorkspaceStore()
 const { t } = useI18n()
 const expandedKeys = ref<Record<string, boolean>>({})
 const { expandNode, toggleNodeOnEvent } = useTreeExpansion(expandedKeys)
+const dummyExpandedKeys = ref<Record<string, boolean>>({})
 
 const handleCloseWorkflow = (workflow?: ComfyWorkflow) => {
   if (workflow) {
diff --git a/src/composables/bottomPanelTabs/useTerminal.ts b/src/composables/bottomPanelTabs/useTerminal.ts
index 7cf95d501..fa9772da7 100644
--- a/src/composables/bottomPanelTabs/useTerminal.ts
+++ b/src/composables/bottomPanelTabs/useTerminal.ts
@@ -4,7 +4,7 @@ import '@xterm/xterm/css/xterm.css'
 import { debounce } from 'lodash'
 import { Ref, markRaw, onMounted, onUnmounted } from 'vue'
 
-export function useTerminal(element: Ref<HTMLElement>) {
+export function useTerminal(element: Ref<HTMLElement | undefined>) {
   const fitAddon = new FitAddon()
   const terminal = markRaw(
     new Terminal({
@@ -27,7 +27,9 @@ export function useTerminal(element: Ref<HTMLElement>) {
   })
 
   onMounted(async () => {
-    terminal.open(element.value)
+    if (element.value) {
+      terminal.open(element.value)
+    }
   })
 
   onUnmounted(() => {
@@ -44,16 +46,16 @@ export function useTerminal(element: Ref<HTMLElement>) {
       minRows = Number.NEGATIVE_INFINITY,
       onResize
     }: {
-      root: Ref<HTMLElement>
+      root: Ref<HTMLElement | undefined>
       autoRows?: boolean
       autoCols?: boolean
       minCols?: number
       minRows?: number
       onResize?: () => void
     }) {
-      const ensureValidRows = (rows: number | undefined) => {
+      const ensureValidRows = (rows: number | undefined): number => {
         if (rows == null || isNaN(rows)) {
-          return root.value?.clientHeight / 20
+          return (root.value?.clientHeight ?? 80) / 20
         }
         return rows
       }
@@ -61,7 +63,7 @@ export function useTerminal(element: Ref<HTMLElement>) {
       const ensureValidCols = (cols: number | undefined): number => {
         if (cols == null || isNaN(cols)) {
           // Sometimes this is NaN if so, estimate.
-          return root.value?.clientWidth / 8
+          return (root.value?.clientWidth ?? 80) / 8
         }
         return cols
       }
@@ -85,8 +87,10 @@ export function useTerminal(element: Ref<HTMLElement>) {
       const resizeObserver = new ResizeObserver(debounce(resize, 25))
 
       onMounted(async () => {
-        resizeObserver.observe(root.value)
-        resize()
+        if (root.value) {
+          resizeObserver.observe(root.value)
+          resize()
+        }
       })
 
       onUnmounted(() => {
diff --git a/src/stores/workspace/bottomPanelStore.ts b/src/stores/workspace/bottomPanelStore.ts
index 66bbfc7c4..7b02e6df1 100644
--- a/src/stores/workspace/bottomPanelStore.ts
+++ b/src/stores/workspace/bottomPanelStore.ts
@@ -21,7 +21,7 @@ export const useBottomPanelStore = defineStore('bottomPanel', () => {
   }
 
   const bottomPanelTabs = ref<BottomPanelExtension[]>([])
-  const activeBottomPanelTabId = ref<string | null>(null)
+  const activeBottomPanelTabId = ref<string>('')
   const activeBottomPanelTab = computed<BottomPanelExtension | null>(() => {
     return (
       bottomPanelTabs.value.find(
diff --git a/src/types/treeExplorerTypes.ts b/src/types/treeExplorerTypes.ts
index 360f8e2d7..c2d5c1a78 100644
--- a/src/types/treeExplorerTypes.ts
+++ b/src/types/treeExplorerTypes.ts
@@ -1,5 +1,5 @@
 import type { MenuItem } from 'primevue/menuitem'
-import type { InjectionKey, Ref } from 'vue'
+import type { InjectionKey, ModelRef } from 'vue'
 
 export interface TreeExplorerNode<T = any> {
   key: string
@@ -72,5 +72,6 @@ export const InjectKeyHandleEditLabelFunction: InjectionKey<
   (node: RenderedTreeExplorerNode, newName: string) => void
 > = Symbol()
 
-export const InjectKeyExpandedKeys: InjectionKey<Ref<Record<string, boolean>>> =
-  Symbol()
+export const InjectKeyExpandedKeys: InjectionKey<
+  ModelRef<Record<string, boolean>>
+> = Symbol()