diff --git a/src/components/MainWalletPage.tsx b/src/components/MainWalletPage.tsx
index 093b6a75..76b61d4e 100644
--- a/src/components/MainWalletPage.tsx
+++ b/src/components/MainWalletPage.tsx
@@ -76,11 +76,11 @@ export default function MainWalletPage({ walletFileName }: MainWalletPageProps)
             )}
           </div>
           <div className="mt-2 flex w-full justify-center gap-4">
-            <Button size="xxl" className="flex-1" variant="default" onClick={() => navigate(routes.receive)}>
+            <Button size="xxl" className="flex-1" variant="default" onClick={() => void navigate(routes.receive)}>
               <DownloadIcon />
               {t('current_wallet.button_deposit')}
             </Button>
-            <Button size="xxl" className="flex-1" variant="outline" onClick={() => navigate(routes.send)}>
+            <Button size="xxl" className="flex-1" variant="outline" onClick={() => void navigate(routes.send)}>
               <UploadIcon />
               {t('current_wallet.button_withdraw')}
             </Button>
diff --git a/src/components/SwitchWalletPage.tsx b/src/components/SwitchWalletPage.tsx
index 319efd49..b3fb6984 100644
--- a/src/components/SwitchWalletPage.tsx
+++ b/src/components/SwitchWalletPage.tsx
@@ -105,7 +105,7 @@ const SwitchWalletPage = ({ walletFileName }: SwitchWalletPageProps) => {
             {listWalletsFetching ? (
               <Spinner className="size-6" />
             ) : (
-              <WalletIcon className="text-primary h-6 w-6" onClick={async () => await listWalletsRefetch()} />
+              <WalletIcon className="text-primary h-6 w-6" onClick={() => void listWalletsRefetch()} />
             )}
           </div>
           <CardTitle className="text-2xl font-bold">{t('settings.button_switch_wallet')}</CardTitle>
@@ -132,7 +132,7 @@ const SwitchWalletPage = ({ walletFileName }: SwitchWalletPageProps) => {
                   <AlertTitle>{listWalletsErrorAlert.message}</AlertTitle>
                   <AlertDescription>{listWalletsErrorAlert.error_description}</AlertDescription>
                 </Alert>
-                <Button variant="ghost" size="sm" onClick={async () => await listWalletsRefetch()}>
+                <Button variant="ghost" size="sm" onClick={() => void listWalletsRefetch()}>
                   <RefreshCwIcon className="h-4 w-4" /> {t('global.retry')}
                 </Button>
               </CardContent>
@@ -177,7 +177,7 @@ const SwitchWalletPage = ({ walletFileName }: SwitchWalletPageProps) => {
                               <Button
                                 variant="outline"
                                 size="sm"
-                                onClick={() => navigate(routes.home)}
+                                onClick={() => void navigate(routes.home)}
                                 className="flex-1"
                               >
                                 <WalletIcon className="mr-2 h-4 w-4" />
diff --git a/src/components/create/CreateStepConfirm.tsx b/src/components/create/CreateStepConfirm.tsx
index 7b526c30..e538f5c2 100644
--- a/src/components/create/CreateStepConfirm.tsx
+++ b/src/components/create/CreateStepConfirm.tsx
@@ -95,7 +95,7 @@ export const CreateStepConfirm = ({ walletFileName, password, seedphrase, onConf
       </div>
 
       <Button
-        onClick={async () => await onConfirm()}
+        onClick={() => void onConfirm()}
         className="w-full"
         size="xxl"
         disabled={!backupConfirmed || !revealSensitiveInfo.dirty}
diff --git a/src/components/create/CreateWalletForm.tsx b/src/components/create/CreateWalletForm.tsx
index 0b6a57b8..a408b341 100644
--- a/src/components/create/CreateWalletForm.tsx
+++ b/src/components/create/CreateWalletForm.tsx
@@ -83,8 +83,10 @@ export const CreateWalletForm = ({
     resolver: yupResolver(schema),
   })
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
-    <form onSubmit={handleSubmit(onSubmit)} className={cn('flex flex-col gap-4', className)} noValidate>
+    <form onSubmit={(event) => void doOnSubmit(event)} className={cn('flex flex-col gap-4', className)} noValidate>
       <div className="space-y-2">
         <Field data-invalid={errors.walletName !== undefined}>
           <FieldLabel htmlFor="create-wallet-name">{t('create_wallet.label_wallet_name')}</FieldLabel>
diff --git a/src/components/earn/EarnForm.tsx b/src/components/earn/EarnForm.tsx
index fd98b2db..d9bb6554 100644
--- a/src/components/earn/EarnForm.tsx
+++ b/src/components/earn/EarnForm.tsx
@@ -158,8 +158,10 @@ export function EarnForm({
   const values = useWatch({ control })
   const watchOfferType = useWatch({ control, name: 'offerType' })
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
-    <form onSubmit={handleSubmit(onSubmit)} className={cn('flex flex-col gap-4', className)} noValidate>
+    <form onSubmit={(event) => void doOnSubmit(event)} className={cn('flex flex-col gap-4', className)} noValidate>
       <OfferTypeInput
         disabled={disabled}
         defaultValue={FORM_INPUT_DEFAULT_VALUES.offerType}
diff --git a/src/components/error/ErrorPage.tsx b/src/components/error/ErrorPage.tsx
index 8ae8ab7e..abb139d0 100644
--- a/src/components/error/ErrorPage.tsx
+++ b/src/components/error/ErrorPage.tsx
@@ -49,16 +49,23 @@ function ErrorView({ title, subtitle, reason, stacktrace }: ErrorViewProps) {
   )
 }
 
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function UnknownError({ error }: { error: any }) {
+function UnknownError({ error }: { error: unknown }) {
   const { t } = useTranslation()
 
+  const title = t('error_page.unknown_error.title')
+  const subtitle = t('error_page.unknown_error.subtitle')
+  if (!error || typeof error !== 'object') {
+    return <ErrorView title={title} subtitle={subtitle} reason={t('global.errors.reason_unknown')} />
+  }
+
+  const reason = 'message' in error && error.message ? String(error.message) : undefined
+  const stacktrace = 'stack' in error && error.stack ? String(error.stack) : undefined
   return (
     <ErrorView
-      title={t('error_page.unknown_error.title')}
-      subtitle={t('error_page.unknown_error.subtitle')}
-      reason={error.message || t('global.errors.reason_unknown')}
-      stacktrace={error.stack}
+      title={title}
+      subtitle={subtitle}
+      reason={reason || t('global.errors.reason_unknown')}
+      stacktrace={stacktrace}
     />
   )
 }
diff --git a/src/components/layout/AppNavbar.tsx b/src/components/layout/AppNavbar.tsx
index 451239c4..b6a5ba95 100644
--- a/src/components/layout/AppNavbar.tsx
+++ b/src/components/layout/AppNavbar.tsx
@@ -201,7 +201,7 @@ export function AppNavbar({
             className="light:text-green-600 text-green-300"
             variant="ghost-navbar"
             size="icon"
-            onClick={() => navigate(rescanningRoute)}
+            onClick={() => void navigate(rescanningRoute)}
             aria-label={t('navbar.text_rescan_in_progress')}
             title={t('navbar.text_rescan_in_progress')}
           >
@@ -213,7 +213,7 @@ export function AppNavbar({
             className="light:text-green-600 text-green-300"
             variant="ghost-navbar"
             size="icon"
-            onClick={() => navigate(joiningRoute)}
+            onClick={() => void navigate(joiningRoute)}
             aria-label={t('navbar.joining_in_progress')}
             title={t('navbar.joining_in_progress')}
           >
@@ -224,7 +224,7 @@ export function AppNavbar({
         <Button
           variant="ghost-navbar"
           size="icon"
-          onClick={() => navigate(routes.settings)}
+          onClick={() => void navigate(routes.settings)}
           aria-label={t('navbar.menu_mobile_settings')}
           title={t('navbar.menu_mobile_settings')}
         >
@@ -234,7 +234,7 @@ export function AppNavbar({
           className="hidden sm:flex"
           variant="ghost-navbar"
           size="icon"
-          onClick={doOnLockWallet}
+          onClick={() => void doOnLockWallet()}
           aria-label={t('settings.button_lock_wallet')}
           title={t('settings.button_lock_wallet')}
           disabled={isLockingWallet}
@@ -245,7 +245,7 @@ export function AppNavbar({
           className="hidden sm:flex"
           variant="ghost-navbar"
           size="icon"
-          onClick={async () => await onLogout(navigate)}
+          onClick={() => void onLogout(navigate)}
           aria-label={/* TODO: i18n */ 'Logout'}
           title={/* TODO: i18n */ 'Logout'}
         >
diff --git a/src/components/layout/AppSidebar.tsx b/src/components/layout/AppSidebar.tsx
index 32dabeee..c662ecf6 100644
--- a/src/components/layout/AppSidebar.tsx
+++ b/src/components/layout/AppSidebar.tsx
@@ -47,7 +47,7 @@ export function AppSidebar({ side }: Pick<React.ComponentProps<typeof Sidebar>,
 
   const isDeveloperMode = useStore(jamSettingsStore, (state) => state.state.developerMode)
 
-  const { isLogsEnabled } = useFeatures()
+  const { isFeatureEnabled } = useFeatures()
   const mainItems = useMemo(
     () => [
       {
@@ -96,7 +96,7 @@ export function AppSidebar({ side }: Pick<React.ComponentProps<typeof Sidebar>,
         url: routes.rescan,
         icon: PackageSearchIcon,
       },
-      ...(!isLogsEnabled
+      ...(!isFeatureEnabled('logs')
         ? []
         : [
             {
@@ -106,7 +106,7 @@ export function AppSidebar({ side }: Pick<React.ComponentProps<typeof Sidebar>,
             },
           ]),
     ],
-    [t, isLogsEnabled],
+    [t, isFeatureEnabled],
   )
 
   const devItems = useMemo(
diff --git a/src/components/layout/Layout.tsx b/src/components/layout/Layout.tsx
index a22c86e5..41654023 100644
--- a/src/components/layout/Layout.tsx
+++ b/src/components/layout/Layout.tsx
@@ -52,7 +52,7 @@ export function LayoutInner({ onLogout, onLockWallet, children }: LayoutInnerPro
   const cheatsheet = useCheatsheet()
   const [isOrderbookOverlayOpen, setIsOrderbookOverlayOpen] = useState(false)
   const [isLogsOverlayOpen, setIsLogsOverlayOpen] = useState(false)
-  const { isLogsEnabled } = useFeatures()
+  const { isFeatureEnabled } = useFeatures()
 
   // Adds a keyboard shortcut to toggle the logs overlay.
   useEffect(() => {
@@ -91,7 +91,7 @@ export function LayoutInner({ onLogout, onLockWallet, children }: LayoutInnerPro
         joinmarketVersion={joinmarketVersion}
         onClickCheatsheet={() => cheatsheet.onOpenChange(true)}
         onClickOrderbook={() => setIsOrderbookOverlayOpen(true)}
-        onClickLogs={isLogsEnabled ? () => setIsLogsOverlayOpen(true) : undefined}
+        onClickLogs={isFeatureEnabled('logs') ? () => setIsLogsOverlayOpen(true) : undefined}
       />
 
       <Cheatsheet open={cheatsheet.open} onOpenChange={cheatsheet.onOpenChange} />
diff --git a/src/components/login/LoginForm.tsx b/src/components/login/LoginForm.tsx
index a65426fa..06b1eeb2 100644
--- a/src/components/login/LoginForm.tsx
+++ b/src/components/login/LoginForm.tsx
@@ -92,8 +92,10 @@ export const LoginFormComponent = ({
 
   const values = useWatch({ control })
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
-    <form onSubmit={handleSubmit(onSubmit)} className={cn('flex flex-col gap-4', className)} noValidate>
+    <form onSubmit={(event) => void doOnSubmit(event)} className={cn('flex flex-col gap-4', className)} noValidate>
       <div className="space-y-2">
         <Field data-invalid={errors.walletFileName !== undefined}>
           <FieldLabel>{/* TODO: i18n */}Wallet</FieldLabel>
diff --git a/src/components/login/LoginPage.tsx b/src/components/login/LoginPage.tsx
index a526b720..698855a9 100644
--- a/src/components/login/LoginPage.tsx
+++ b/src/components/login/LoginPage.tsx
@@ -113,7 +113,7 @@ const LoginPage = () => {
             {listWalletsFetching ? (
               <Spinner className="size-6" />
             ) : (
-              <WalletIcon className="text-primary" onClick={async () => await listWalletsRefetch()} />
+              <WalletIcon className="text-primary" onClick={() => void listWalletsRefetch()} />
             )}
           </div>
           <CardTitle className="text-2xl font-bold">{/*TODO: i18n */}Welcome to Jam</CardTitle>
@@ -137,7 +137,7 @@ const LoginPage = () => {
               <Button
                 variant="ghost"
                 size="sm"
-                onClick={async () => await listWalletsRefetch()}
+                onClick={() => void listWalletsRefetch()}
                 disabled={listWalletsFetching}
               >
                 <RefreshCwIcon className={cn({ 'motion-safe:animate-spin': listWalletsFetching })} />
@@ -172,10 +172,10 @@ const LoginPage = () => {
                   )}
 
                   <div className="flex flex-col gap-2">
-                    <Button variant="link" size="sm" onClick={async () => await navigate(routes.createWallet)}>
+                    <Button variant="link" size="sm" onClick={() => void navigate(routes.createWallet)}>
                       {t('wallets.button_new_wallet')}
                     </Button>
-                    <Button variant="link" size="sm" onClick={async () => await navigate('/import-wallet')} disabled>
+                    <Button variant="link" size="sm" onClick={() => void navigate('/import-wallet')} disabled>
                       {/* TODO: implement "import wallet" */}
                       {t('wallets.button_import_wallet')}
                       <Badge variant="destructive">Not yet implemented.</Badge>
diff --git a/src/components/receive/ReceivePage.tsx b/src/components/receive/ReceivePage.tsx
index 6573da96..6c19f8e1 100644
--- a/src/components/receive/ReceivePage.tsx
+++ b/src/components/receive/ReceivePage.tsx
@@ -188,7 +188,7 @@ export const ReceivePage = ({ walletFileName }: ReceivePageProps) => {
               <Button
                 variant="outline"
                 size="sm"
-                onClick={async () => await shareAddress(getAddressQuery.data!.address)}
+                onClick={() => void shareAddress(getAddressQuery.data!.address)}
                 disabled={getAddressQuery.isFetching || !getAddressQuery.data?.address}
               >
                 <ShareIcon />
diff --git a/src/components/send/SendForm.tsx b/src/components/send/SendForm.tsx
index 98eeb417..3585c0d4 100644
--- a/src/components/send/SendForm.tsx
+++ b/src/components/send/SendForm.tsx
@@ -1,7 +1,7 @@
 import { useMemo, useState, type ComponentProps } from 'react'
 import { yupResolver } from '@hookform/resolvers/yup'
 import { getaddress, type ErrorMessage } from '@joinmarket-webui/joinmarket-api-ts/jm'
-import { getAddressInfo, validate as isValidBitcoinAddress } from 'bitcoin-address-validation'
+import { getAddressInfo, validate as isValidBitcoinAddress, Network } from 'bitcoin-address-validation'
 import type { AddressInfo } from 'bitcoin-address-validation'
 import { BrushCleaningIcon, MilkIcon, XIcon } from 'lucide-react'
 import { useForm, useWatch } from 'react-hook-form'
@@ -36,8 +36,8 @@ import type { SendFormValues } from './types'
 
 type AddressFromJarSelectorDialog = Omit<ComponentProps<typeof JarSelectorDialog>, 'onConfirm'> & {
   walletFileName: WalletFileName
-  onError: (error: ErrorMessage) => Promise<void>
-  onConfirm: (jar: JarIndex, address: AddressInfo) => Promise<void>
+  onError: (error: ErrorMessage) => void
+  onConfirm: (jar: JarIndex, address: AddressInfo) => void
 }
 
 const AddressFromJarSelectorDialog = ({
@@ -62,12 +62,12 @@ const AddressFromJarSelectorDialog = ({
           }),
         )
         if (result.error) {
-          await onError(result.error)
+          onError(result.error)
         } else if (result.data?.address === undefined) {
-          await onError(new Error('Missing bitcoin address.'))
+          onError(new Error('Missing bitcoin address.'))
         } else {
           const addressInfo = getAddressInfo(result.data.address)
-          await onConfirm(selectedJarIndex, addressInfo)
+          onConfirm(selectedJarIndex, addressInfo)
         }
       }}
     />
@@ -255,6 +255,8 @@ export function SendForm({
     return jars.find((it) => it.jarIndex === destinationJarIndex)
   }, [jars, destinationJarIndex])
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
     <>
       <AddressFromJarSelectorDialog
@@ -265,20 +267,20 @@ export function SendForm({
         jars={jars}
         disabledJars={sourceJar === undefined ? [] : [sourceJar]}
         walletBalanceSummary={walletBalanceSummary}
-        onError={async (_ignoredOnPurpose) => {
+        onError={(_ignoredOnPurpose) => {
           // TODO: i18n own key `send.error_loading_address_failed`
           toast.error(t('receive.error_loading_address_failed'))
           setValue('destination.address', undefined, { shouldValidate: true })
           setValue('destination.fromJar', undefined, { shouldValidate: true })
         }}
-        onConfirm={async (jarIndex, addressInfo) => {
+        onConfirm={(jarIndex, addressInfo) => {
           setValue('destination.address', addressInfo.address, { shouldValidate: true })
           setValue('destination.fromJar', jarIndex, { shouldValidate: true })
 
           setShowAddressFromJarSelectorDialog(false)
         }}
       />
-      <form onSubmit={handleSubmit(onSubmit)} className={cn('flex flex-col gap-4', className)} noValidate>
+      <form onSubmit={(event) => void doOnSubmit(event)} className={cn('flex flex-col gap-4', className)} noValidate>
         <div className="space-y-2">
           <Field className="space-y-4" data-invalid={errors.source !== undefined}>
             <FieldLabel>{t('send.label_source_jar')}</FieldLabel>
@@ -317,7 +319,7 @@ export function SendForm({
           <Field data-invalid={errors.destination !== undefined}>
             <FieldLabel htmlFor="send-destination">
               {t('send.label_recipient')}
-              {destinationAddressInfo?.network && destinationAddressInfo.network !== 'mainnet' && (
+              {destinationAddressInfo?.network && destinationAddressInfo.network !== Network.mainnet && (
                 <Badge variant="outline">{destinationAddressInfo.network}</Badge>
               )}
             </FieldLabel>
diff --git a/src/components/send/SendPage.tsx b/src/components/send/SendPage.tsx
index 1792c01c..b9502834 100644
--- a/src/components/send/SendPage.tsx
+++ b/src/components/send/SendPage.tsx
@@ -135,7 +135,7 @@ export const SendPage = ({ walletFileName }: SendPageProps) => {
     }
   }
 
-  const onSubmit: SubmitHandler<SendFormValues> = async (data) => {
+  const onSubmit: SubmitHandler<SendFormValues> = (data) => {
     setSendFromValuesAwaitingConfirmation(data)
     setShowPaymentConfirmDialog(true)
   }
diff --git a/src/components/settings/FeeLimitDialog.tsx b/src/components/settings/FeeLimitDialog.tsx
index a7eae822..425f7e54 100644
--- a/src/components/settings/FeeLimitDialog.tsx
+++ b/src/components/settings/FeeLimitDialog.tsx
@@ -305,7 +305,7 @@ export const FeeLimitDialog = ({ open, onOpenChange, walletFileName }: FeeLimitD
               <DevBadge />
             </Button>
           )}
-          <Button onClick={handleSubmit} disabled={isSubmitting || isLoadingConfig}>
+          <Button onClick={() => void handleSubmit()} disabled={isSubmitting || isLoadingConfig}>
             {isSubmitting ? t('settings.fees.text_button_submitting') : t('settings.fees.text_button_submit')}
           </Button>
         </DialogFooter>
diff --git a/src/components/settings/LanguageSelector.tsx b/src/components/settings/LanguageSelector.tsx
index a4f916f9..958b58d6 100644
--- a/src/components/settings/LanguageSelector.tsx
+++ b/src/components/settings/LanguageSelector.tsx
@@ -6,8 +6,8 @@ import languages from '@/i18n/languages'
 export const LanguageSelector = () => {
   const { i18n, t } = useTranslation()
 
-  const handleLanguageChange = (languageKey: string) => {
-    i18n.changeLanguage(languageKey)
+  const handleLanguageChange = async (languageKey: string) => {
+    await i18n.changeLanguage(languageKey)
   }
 
   const getCurrentLanguageDescription = () => {
@@ -26,7 +26,7 @@ export const LanguageSelector = () => {
         </div>
       </div>
 
-      <Select value={i18n.resolvedLanguage} onValueChange={handleLanguageChange}>
+      <Select value={i18n.resolvedLanguage} onValueChange={(value) => void handleLanguageChange(value)}>
         <SelectTrigger className="h-7 w-38 text-xs" aria-label="Select language">
           <SelectValue placeholder={getCurrentLanguageDescription()} />
         </SelectTrigger>
diff --git a/src/components/settings/RescanChainPage.tsx b/src/components/settings/RescanChainPage.tsx
index 4da49b96..2bc15020 100644
--- a/src/components/settings/RescanChainPage.tsx
+++ b/src/components/settings/RescanChainPage.tsx
@@ -51,9 +51,10 @@ function RescanChainForm({ rescanInfo, onSubmit, disabled }: RescanChainFormProp
     resolver: yupResolver(schema),
   })
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
-    /* "handleSubmit" will validate your inputs before invoking "onSubmit" */
-    <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
+    <form onSubmit={(event) => void doOnSubmit(event)} className="space-y-4">
       {/* include validation with required or other standard HTML validation rules */}
       <div className="space-y-2">
         <Label htmlFor="rescanHeight" className="text-sm font-medium">
@@ -157,7 +158,7 @@ export const RescanChainPage = ({ walletFileName }: RescanChainProps) => {
   return (
     <div className="mx-auto max-w-4xl space-y-3 p-4">
       <div className="flex items-center gap-4">
-        <Button variant="ghost" onClick={() => navigate(routes.settings)} title={t('global.back')}>
+        <Button variant="ghost" onClick={() => void navigate(routes.settings)} title={t('global.back')}>
           <ArrowLeftIcon />
           <span className="sr-only">{t('global.back')}</span>
         </Button>
diff --git a/src/components/settings/SeedPhraseDialog.tsx b/src/components/settings/SeedPhraseDialog.tsx
index e6558796..d2f5999d 100644
--- a/src/components/settings/SeedPhraseDialog.tsx
+++ b/src/components/settings/SeedPhraseDialog.tsx
@@ -73,7 +73,7 @@ export const SeedPhraseDialog = ({
 
   useEffect(() => {
     if (open && isPasswordVerified && seedQuery.data === undefined) {
-      seedQuery.refetch()
+      void seedQuery.refetch()
     }
   }, [open, isPasswordVerified, seedQuery])
 
diff --git a/src/components/settings/SettingsItem.tsx b/src/components/settings/SettingsItem.tsx
index 3131be8f..bca0a66e 100644
--- a/src/components/settings/SettingsItem.tsx
+++ b/src/components/settings/SettingsItem.tsx
@@ -10,7 +10,7 @@ type SettingsItemProps = PropsWithChildren<{
   renderIcon?: ({ className }: { className: string }) => ReactNode
   title: string
   disabled?: boolean
-  action?: () => Promise<void>
+  action?: () => void | Promise<void>
 }>
 
 export const SettingItem = ({
@@ -27,7 +27,7 @@ export const SettingItem = ({
         'hover:bg-muted/50 -mx-2 cursor-pointer rounded-md px-2': !disabled,
         'cursor-not-allowed opacity-60': disabled,
       })}
-      onClick={!disabled ? action : undefined}
+      onClick={!disabled && action ? () => void action() : undefined}
     >
       <div className="flex items-center gap-2">
         <div className="bg-muted/50 flex h-7 w-7 items-center justify-center rounded-lg border">
@@ -76,7 +76,7 @@ type SettingsSwitchProps = Omit<SettingsItemProps, 'children' | 'action'> & {
 }
 export const SettingSwitch = ({ checked, onCheckedChange, displayToggle = true, ...props }: SettingsSwitchProps) => {
   return (
-    <SettingItem {...props} action={async () => onCheckedChange && onCheckedChange(!checked)}>
+    <SettingItem {...props} action={() => onCheckedChange && onCheckedChange(!checked)}>
       {displayToggle && <Switch checked={checked} onCheckedChange={onCheckedChange} disabled={props.disabled} />}
     </SettingItem>
   )
diff --git a/src/components/settings/SettingsPage.tsx b/src/components/settings/SettingsPage.tsx
index adc00aa4..b2b93e38 100644
--- a/src/components/settings/SettingsPage.tsx
+++ b/src/components/settings/SettingsPage.tsx
@@ -54,7 +54,7 @@ export const SettingsPage = ({ walletFileName, onLockWallet }: SettingPageProps)
   const [showXpubsDialog, setShowXpubsDialog] = useState(false)
   const [showFeeLimitDialog, setShowFeeLimitDialog] = useState(false)
   const hashedPassword = useStore(authStore, (state) => state.state?.hashed_password)
-  const { isLogsEnabled } = useFeatures()
+  const { isFeatureEnabled } = useFeatures()
 
   const [isLockingWallet, setIsLockingWallet] = useState(false)
   const doOnLockWallet = async () => {
@@ -115,9 +115,7 @@ export const SettingsPage = ({ walletFileName, onLockWallet }: SettingPageProps)
           <SettingItem
             icon={DollarSignIcon}
             title={t('settings.show_fee_config')}
-            action={async () => {
-              setShowFeeLimitDialog(true)
-            }}
+            action={() => setShowFeeLimitDialog(true)}
           />
         </CardContent>
       </Card>
@@ -131,14 +129,14 @@ export const SettingsPage = ({ walletFileName, onLockWallet }: SettingPageProps)
           <SettingItem
             icon={KeyRoundIcon}
             title={t('settings.show_seed')}
-            action={async () => setShowSeedDialog(true)}
+            action={() => setShowSeedDialog(true)}
             disabled={hashedPassword === undefined}
           />
           <Separator className="opacity-50" />
           <SettingItem
             icon={BookKeyIcon}
             title={t('settings.show_xpubs')}
-            action={async () => setShowXpubsDialog(true)}
+            action={() => setShowXpubsDialog(true)}
             disabled={hashedPassword === undefined}
           />
           <Separator className="opacity-50" />
@@ -157,7 +155,7 @@ export const SettingsPage = ({ walletFileName, onLockWallet }: SettingPageProps)
             icon={FileTextIcon}
             title={t('settings.show_logs')}
             to={routes.logs}
-            disabled={!isLogsEnabled}
+            disabled={!isFeatureEnabled('logs')}
           />
         </CardContent>
       </Card>
diff --git a/src/components/settings/TxFeeInputField.tsx b/src/components/settings/TxFeeInputField.tsx
index 3f1e3821..0263b76e 100644
--- a/src/components/settings/TxFeeInputField.tsx
+++ b/src/components/settings/TxFeeInputField.tsx
@@ -57,7 +57,7 @@ export const TxFeeInputField = ({
           <button
             key={tab.value}
             type="button"
-            onClick={() => handleUnitChange(tab.value as TxFeeUnit)}
+            onClick={() => handleUnitChange(tab.value)}
             className={cx('rounded-md px-4 py-2 text-sm font-medium transition-colors', {
               'bg-primary text-primary-foreground': unit === tab.value,
               'bg-muted text-muted-foreground hover:bg-muted/80': unit !== tab.value,
diff --git a/src/components/ui/jam/Balance.tsx b/src/components/ui/jam/Balance.tsx
index ddda4477..deb3cb30 100644
--- a/src/components/ui/jam/Balance.tsx
+++ b/src/components/ui/jam/Balance.tsx
@@ -1,19 +1,14 @@
 import { useMemo } from 'react'
 import { CurrencySymbol } from '@/components/ui/jam/CurrencySymbol'
 import { useJamDisplayContext } from '@/context/JamDisplayContext'
-import { cn, satsToBtc, btcToSats, isValidNumber, formatBtc, formatSats, SATS, BTC } from '@/lib/utils'
+import { cn, satsToBtc, btcToSats, isValidNumber, formatBtc, formatSats, SATS, BTC, type Unit } from '@/lib/utils'
 import type { Currency } from '@/types/global'
 
-const DISPLAY_MODE_BTC = 'btc'
-const DISPLAY_MODE_SATS = 'sats'
+const DISPLAY_MODE_BTC: Currency = 'btc'
+const DISPLAY_MODE_SATS: Currency = 'sats'
 const DISPLAY_MODE_HIDDEN = 'private'
 
-const getDisplayMode = (
-  unit: typeof SATS | typeof BTC | undefined,
-  currency: Currency,
-  isPrivate: boolean,
-  showBalance: boolean,
-) => {
+const getDisplayMode = (unit: Unit | undefined, currency: Currency, isPrivate: boolean, showBalance: boolean) => {
   if (!showBalance || isPrivate) return DISPLAY_MODE_HIDDEN
 
   // If convertToUnit is specified, respect it, otherwise use context
@@ -129,7 +124,7 @@ const SatsBalance = ({ value, colored = true, ...props }: SatsBalanceProps) => {
 
 interface BalanceProps extends Omit<BalanceComponentProps, 'symbol' | 'children'> {
   valueString: string
-  convertToUnit?: typeof SATS | typeof BTC
+  convertToUnit?: Unit
   showBalance?: boolean
 }
 
diff --git a/src/components/ui/jam/CopyButton.tsx b/src/components/ui/jam/CopyButton.tsx
index d37b1029..876cd559 100644
--- a/src/components/ui/jam/CopyButton.tsx
+++ b/src/components/ui/jam/CopyButton.tsx
@@ -62,7 +62,7 @@ function Copyable({
         type="button"
         className={className}
         disabled={disabled}
-        onClick={() => copyToClipboard(value, valueFallbackInputRef.current!).then(onSuccess, onError)}
+        onClick={() => void copyToClipboard(value, valueFallbackInputRef.current!).then(onSuccess, onError)}
       >
         {children}
       </button>
diff --git a/src/components/ui/jam/LockWalletConfirmDialog.tsx b/src/components/ui/jam/LockWalletConfirmDialog.tsx
index d850c282..70c2580f 100644
--- a/src/components/ui/jam/LockWalletConfirmDialog.tsx
+++ b/src/components/ui/jam/LockWalletConfirmDialog.tsx
@@ -52,7 +52,7 @@ export const LockWalletConfirmDialog = ({
           <Button variant="outline" onClick={() => onOpenChange(false)} disabled={isLocking}>
             {t('global.cancel')}
           </Button>
-          <Button variant="default" onClick={onConfirm} disabled={isLocking}>
+          <Button variant="default" onClick={() => void onConfirm()} disabled={isLocking}>
             {isLocking ? (
               <>
                 <Spinner className="motion-reduce:hidden" />
diff --git a/src/components/utils/PasswordVerificationForm.tsx b/src/components/utils/PasswordVerificationForm.tsx
index a8b7b580..0019a092 100644
--- a/src/components/utils/PasswordVerificationForm.tsx
+++ b/src/components/utils/PasswordVerificationForm.tsx
@@ -76,8 +76,10 @@ export const PasswordVerificationForm = ({
     resolver: yupResolver(schema),
   })
 
+  const doOnSubmit = handleSubmit(onSubmit)
+
   return (
-    <form onSubmit={handleSubmit(onSubmit)} className={cn('flex flex-col gap-4', className)} noValidate>
+    <form onSubmit={(event) => void doOnSubmit(event)} className={cn('flex flex-col gap-4', className)} noValidate>
       <div className="space-y-2">
         <Field data-invalid={errors.password !== undefined}>
           <FieldLabel htmlFor="password-verification-input-password">{t(/* TODO: i18n */ 'Password')}</FieldLabel>
@@ -111,7 +113,7 @@ export const PasswordVerificationForm = ({
 
       <Field orientation="horizontal" className="justify-end">
         {onCancel !== undefined && (
-          <Button type="button" variant="outline" onClick={onCancel}>
+          <Button type="button" variant="outline" onClick={() => void onCancel()}>
             {t('global.cancel')}
           </Button>
         )}
diff --git a/src/components/wallet/JarUtxosTable.tsx b/src/components/wallet/JarUtxosTable.tsx
index 1090a2b9..faeca89f 100644
--- a/src/components/wallet/JarUtxosTable.tsx
+++ b/src/components/wallet/JarUtxosTable.tsx
@@ -164,7 +164,7 @@ const utxoTableColumns = (t: TFunction): ColumnDef<UtxoTableEntry, any>[] => {
     }),
     columnHelper.accessor('confirmations', {
       header: () => t('jar_details.utxo_list.column_title_confirmations'),
-      cell: (info) => info.getValue(),
+      cell: (info) => <>{info.getValue()}</>,
       meta: {
         numeric: true,
         align: 'center',
diff --git a/src/components/wallet/WalletJarsDetailsContent.tsx b/src/components/wallet/WalletJarsDetailsContent.tsx
index 2248d749..0780b2b2 100644
--- a/src/components/wallet/WalletJarsDetailsContent.tsx
+++ b/src/components/wallet/WalletJarsDetailsContent.tsx
@@ -192,7 +192,11 @@ export const UtxosContent = ({ enabled, walletFileName, addressSummary, jar }: U
         </div>
       </div>
       <div className={cn('flex items-center gap-2', {})}>
-        <Button size="sm" disabled={!operationsEnabled || walletInfo.isFetching} onClick={() => walletInfo.refetch()}>
+        <Button
+          size="sm"
+          disabled={!operationsEnabled || walletInfo.isFetching}
+          onClick={() => void walletInfo.refetch()}
+        >
           <RefreshCwIcon className={cn({ 'motion-safe:animate-spin': walletInfo.isFetching })} />
           {t('global.refresh')}
         </Button>
@@ -201,7 +205,7 @@ export const UtxosContent = ({ enabled, walletFileName, addressSummary, jar }: U
             size="sm"
             variant={selectedUtxos.length === 0 ? 'outline' : undefined}
             disabled={!operationsEnabled || selectedUtxos.length === 0 || allSelectedUtxosFrozen}
-            onClick={onFreezeClick}
+            onClick={() => void onFreezeClick()}
           >
             {freezeUtxos.isPending ? <Spinner /> : <ThermometerSnowflakeIcon />}
             {t('jar_details.utxo_list.button_freeze')}
@@ -210,7 +214,7 @@ export const UtxosContent = ({ enabled, walletFileName, addressSummary, jar }: U
             size="sm"
             variant={selectedUtxos.length === 0 ? 'outline' : undefined}
             disabled={!operationsEnabled || selectedUtxos.length === 0 || allSelectedUtxosUnfrozen}
-            onClick={onUnfreezeClick}
+            onClick={() => void onUnfreezeClick()}
           >
             {unfreezeUtxos.isPending ? <Spinner /> : <ThermometerSunIcon />}
             {t('jar_details.utxo_list.button_unfreeze')}
diff --git a/src/constants/jam.ts b/src/constants/jam.ts
index ed2b562b..fa9a52f7 100644
--- a/src/constants/jam.ts
+++ b/src/constants/jam.ts
@@ -2,6 +2,7 @@ import { percentageToFactor, parseSemanticVersion } from '@/lib/utils'
 import type { AmountSats, Milliseconds } from '@/types/global'
 import { version as packageInfoVersion } from '../../package.json'
 import { JM_API_AUTH_TOKEN_EXPIRY, JM_DUST_THRESHOLD, JM_WALLET_FILE_EXTENSION } from './jm'
+import { parseAsIntOrDefault } from './meta-env-utils'
 
 export const APP_DISPLAY_VERSION = (() => {
   return parseSemanticVersion(packageInfoVersion)
@@ -41,7 +42,7 @@ export const OFFER_MINSIZE_DEFAULT: AmountSats = 100_000
 export const JAM_JM_SESSION_REFRESH_MIN_INTERVAL: Milliseconds = 5_000
 export const JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL: Milliseconds = 30_000
 export const JAM_JM_SESSION_REFRESH_INTERVAL: Milliseconds = Math.max(
-  import.meta.env.VITE_JAM_JM_SESSION_REFRESH_INTERVAL ?? JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL,
+  parseAsIntOrDefault(import.meta.env.VITE_JAM_JM_SESSION_REFRESH_INTERVAL, JAM_JM_SESSION_REFRESH_DEFAULT_INTERVAL),
   JAM_JM_SESSION_REFRESH_MIN_INTERVAL,
 )
 export const JAM_API_AUTH_TOKEN_RENEW_INTERVAL: Milliseconds = Math.round(JM_API_AUTH_TOKEN_EXPIRY * 0.75)
@@ -49,29 +50,31 @@ export const JAM_API_AUTH_TOKEN_RENEW_INTERVAL: Milliseconds = Math.round(JM_API
 export const JAM_RESCAN_PROGRESS_MIN_INTERVAL: Milliseconds = 5_000
 export const JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL: Milliseconds = 21_000
 export const JAM_RESCAN_PROGRESS_INTERVAL: Milliseconds = Math.max(
-  import.meta.env.VITE_JAM_RESCAN_PROGRESS_INTERVAL ?? JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL,
+  parseAsIntOrDefault(import.meta.env.VITE_JAM_RESCAN_PROGRESS_INTERVAL, JAM_RESCAN_PROGRESS_DEFAULT_INTERVAL),
   JAM_RESCAN_PROGRESS_MIN_INTERVAL,
 )
 
 const JAM_SEED_MODAL_MIN_TIMEOUT: Milliseconds = 5_000
 const JAM_SEED_MODAL_DEFAULT_TIMEOUT: Milliseconds = 30_000
 export const JAM_SEED_MODAL_TIMEOUT: Milliseconds = Math.max(
-  import.meta.env.VITE_JAM_SEED_MODAL_TIMEOUT ?? JAM_SEED_MODAL_DEFAULT_TIMEOUT,
+  parseAsIntOrDefault(import.meta.env.VITE_JAM_SEED_MODAL_TIMEOUT, JAM_SEED_MODAL_DEFAULT_TIMEOUT),
   JAM_SEED_MODAL_MIN_TIMEOUT,
 )
 
 // minimum amount of time in milliseconds the connection must stay open to be considered "healthy"
 const JAM_JM_WEBSOCKET_CONNECTION_HEALTHY_MIN_DURATION: Milliseconds = 1_000
 export const JAM_JM_WEBSOCKET_CONNECTION_HEALTHY_DURATION: Milliseconds = Math.max(
-  import.meta.env.VITE_JM_WEBSOCKET_CONNECTION_HEALTHY_DURATION ?? 0,
+  parseAsIntOrDefault(import.meta.env.VITE_JM_WEBSOCKET_CONNECTION_HEALTHY_DURATION, 0),
   JAM_JM_WEBSOCKET_CONNECTION_HEALTHY_MIN_DURATION,
 )
 
 const JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_MIN_DURATION: Milliseconds = 1_000
 const JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DEFAULT_DURATION: Milliseconds = 3_000
 export const JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DURATION: Milliseconds = Math.max(
-  import.meta.env.VITE_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DURATION ??
+  parseAsIntOrDefault(
+    import.meta.env.VITE_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DURATION,
     JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DEFAULT_DURATION,
+  ),
   JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_MIN_DURATION,
 )
 
@@ -80,16 +83,19 @@ export const JAM_JM_WEBSOCKET_CONNECTION_AUTHENTICATED_DURATION: Milliseconds =
 const JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_MIN_INTERVAL: Milliseconds = 5_000
 const JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_DEFAULT_INTERVAL: Milliseconds = 30_000
 export const JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_INTERVAL: Milliseconds = Math.max(
-  import.meta.env.VITE_JM_WEBSOCKET_KEEPALIVE_MESSAGE_INTERVAL ?? JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_DEFAULT_INTERVAL,
+  parseAsIntOrDefault(
+    import.meta.env.VITE_JM_WEBSOCKET_KEEPALIVE_MESSAGE_INTERVAL,
+    JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_DEFAULT_INTERVAL,
+  ),
   JAM_JM_WEBSOCKET_KEEPALIVE_MESSAGE_MIN_INTERVAL,
 )
 
 export const JAM_JM_WEBSOCKET_RECONNECT_INTERVAL_MIN: Milliseconds = Math.max(
-  import.meta.env.VITE_JM_WEBSOCKET_RECONNECT_INTERVAL_MIN ?? 0,
+  parseAsIntOrDefault(import.meta.env.VITE_JM_WEBSOCKET_RECONNECT_INTERVAL_MIN, 0),
   5_000,
 )
 
 export const JAM_JM_WEBSOCKET_RECONNECT_INTERVAL_MAX: Milliseconds = Math.max(
-  import.meta.env.VITE_JM_WEBSOCKET_RECONNECT_INTERVAL_MAX ?? 0,
+  parseAsIntOrDefault(import.meta.env.VITE_JM_WEBSOCKET_RECONNECT_INTERVAL_MAX, 0),
   60_000,
 )
diff --git a/src/constants/jm.ts b/src/constants/jm.ts
index 1be1686f..60762530 100644
--- a/src/constants/jm.ts
+++ b/src/constants/jm.ts
@@ -1,4 +1,5 @@
 import type { AmountSats, Milliseconds } from '@/types/global'
+import { parseAsIntOrDefault } from './meta-env-utils'
 
 export const JM_WALLET_FILE_EXTENSION = '.jmdat'
 
@@ -9,7 +10,10 @@ export const JM_API_AUTH_TOKEN_EXPIRY_MAX: Milliseconds = Math.round(JM_API_AUTH
 export const JM_API_AUTH_TOKEN_EXPIRY: Milliseconds = Math.max(
   JM_API_AUTH_TOKEN_EXPIRY_MIN,
   Math.min(
-    Number.parseInt(import.meta.env.VITE_JM_API_AUTH_TOKEN_EXPIRY_SECONDS, 10) * 1_000,
+    parseAsIntOrDefault(
+      import.meta.env.VITE_JM_API_AUTH_TOKEN_EXPIRY_SECONDS,
+      JM_API_AUTH_TOKEN_EXPIRY_DEFAULT / 1_000,
+    ) * 1_000,
     JM_API_AUTH_TOKEN_EXPIRY_MAX,
   ),
 )
diff --git a/src/constants/meta-env-utils.ts b/src/constants/meta-env-utils.ts
new file mode 100644
index 00000000..6f7971da
--- /dev/null
+++ b/src/constants/meta-env-utils.ts
@@ -0,0 +1,5 @@
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- okay when trying to parse arbitrary value on purpose
+export const parseAsIntOrDefault = (value: any, defaultValue: number) => {
+  const parsed = Number.parseInt(`${value ?? defaultValue}`, 10)
+  return Number.isSafeInteger(parsed) ? parsed : defaultValue
+}
diff --git a/src/context/JamWalletInfoContextProvider.tsx b/src/context/JamWalletInfoContextProvider.tsx
index 3a986832..46194f3b 100644
--- a/src/context/JamWalletInfoContextProvider.tsx
+++ b/src/context/JamWalletInfoContextProvider.tsx
@@ -12,7 +12,6 @@ import {
   type AccountMeta,
   type AccountSummary,
   type AddressMeta,
-  type AddressStatus,
   type AddressSummary,
   type FidelityBondSummary,
   type Jar,
@@ -35,7 +34,7 @@ const toAccountSummary = (walletInfo: WalletInfoApiObject): AccountSummary => {
       })
 
     const meta: AccountMeta = {
-      jarIndex: Number.parseInt(String(__raw.account), 10) as JarIndex,
+      jarIndex: Number.parseInt(String(__raw.account), 10),
       branches,
       __raw,
     }
@@ -58,7 +57,7 @@ const toAddressSummary = (accountSummary: AccountSummary): AddressSummary => {
 
       const meta: AddressMeta = {
         address: __raw.address,
-        status: __raw.status as AddressStatus,
+        status: __raw.status,
         info: {
           bech32: info.bech32,
           network: info.network,
@@ -131,9 +130,9 @@ export const JamWalletInfoContextProvider = ({
   const walletBalanceSummary = toBalanceSummary(utxos)
 
   const utxosByJarIndex = utxos.reduce((acc, utxo) => {
-    const key = utxo.mixdepth as JarIndex
+    const key: JarIndex = utxo.mixdepth
     acc[key] = acc[key] || []
-    acc[key].push(utxo as Utxo)
+    acc[key].push(utxo)
     return acc
   }, {} as UtxosByJarIndex)
 
diff --git a/src/hooks/useFeatures.ts b/src/hooks/useFeatures.ts
index c977cee0..cc91615a 100644
--- a/src/hooks/useFeatures.ts
+++ b/src/hooks/useFeatures.ts
@@ -4,15 +4,17 @@ import { isDevMode } from '@/constants/debugFeatures'
 import { fetchFeatures } from '@/lib/api/logs'
 import { authStore } from '@/store/authStore'
 
-export interface Features {
-  logs?: boolean
-}
+type SupportedFeature = 'logs' // add on demand
 
-export interface FeatureItem {
+type FeatureItem = {
   name: string
   enabled: boolean
 }
 
+type FeaturesApiResponse = {
+  features: Record<string, boolean> | FeatureItem[]
+}
+
 export const useFeatures = () => {
   const authState = useStore(authStore, (state) => state.state)
 
@@ -37,41 +39,41 @@ export const useFeatures = () => {
         throw new Error(`Features request failed with status ${response.status}`)
       }
 
-      const data = await response.json()
-      return data.features as Features
+      return (await response.json()) as FeaturesApiResponse
     },
     enabled: !!authState?.auth?.token,
     retry: false,
+    select: (data: FeaturesApiResponse): FeatureItem[] => {
+      if (!data.features) {
+        return []
+      }
+      // New format: { features: [{ name: 'logs', enabled: true }] }
+      else if (Array.isArray(data.features)) {
+        return data.features
+      }
+      // Old format: { features: { logs: true } }
+      else if (typeof data.features === 'object') {
+        return Object.entries(data.features).map(([name, enabled]) => ({ name, enabled }))
+      } else {
+        console.warn('Could not parse feature response. Disabling all optional features.')
+        return []
+      }
+    },
   })
 
-  const isLogsSupported = () => {
-    if (error) {
-      return false
-    }
-
-    if (features) {
-      // Old format: { features: { logs: true } }
-      if (typeof features.logs === 'boolean') {
-        return features.logs
-      }
-
-      // New format: { features: [{ name: 'logs', enabled: true }] }
-      if (Array.isArray(features)) {
-        return features.some((feature: FeatureItem) => feature.name === 'logs' && feature.enabled === true)
-      }
-    }
-    return false
+  const isFeatureSupported = (featureName: SupportedFeature) => {
+    return features?.some((feature) => feature.name === featureName && feature.enabled === true)
+  }
+  const isFeatureEnabled = (featureName: SupportedFeature) => {
+    return isFeatureSupported(featureName) || isDevMode()
   }
-
-  // Show logs UI in dev mode even when not supported, but with unsupported message
-  const isLogsEnabled = isLogsSupported() || (error && isDevMode())
 
   return {
     features,
     error,
     isLoading,
     isFetching,
-    isLogsEnabled,
-    isLogsSupported: isLogsSupported(),
+    isFeatureSupported: isFeatureSupported,
+    isFeatureEnabled: isFeatureEnabled,
   }
 }
diff --git a/src/hooks/useJmWebsocket.ts b/src/hooks/useJmWebsocket.ts
index cb27f848..df6a239b 100644
--- a/src/hooks/useJmWebsocket.ts
+++ b/src/hooks/useJmWebsocket.ts
@@ -20,7 +20,7 @@ const calcReconnectInterval = (attemptNumber: number): Milliseconds => {
   )
 }
 
-const basePath: string = import.meta.env.VITE_JM_WEBSOCKET_ENDPOINT_PATH
+const basePath: string = String(import.meta.env.VITE_JM_WEBSOCKET_ENDPOINT_PATH)
 const basePathWithoutLeadingSlash = basePath.replace(/^\//, '') // remove leading slash
 
 const { protocol, host } = window.location
diff --git a/src/i18n/config.ts b/src/i18n/config.ts
index 8aa8f9a9..ccf80479 100644
--- a/src/i18n/config.ts
+++ b/src/i18n/config.ts
@@ -10,7 +10,7 @@ const resources = languages.reduce((acc, lng) => {
   }
 }, {})
 
-i18n.use(LanguageDetector).use(initReactI18next).init({
+void i18n.use(LanguageDetector).use(initReactI18next).init({
   resources,
   fallbackLng: 'en',
 })
diff --git a/src/i18n/testConfig.ts b/src/i18n/testConfig.ts
index f1a75c5e..d9bfb5c4 100644
--- a/src/i18n/testConfig.ts
+++ b/src/i18n/testConfig.ts
@@ -1,7 +1,7 @@
 import i18n from 'i18next'
 import { initReactI18next } from 'react-i18next'
 
-i18n.use(initReactI18next).init({
+void i18n.use(initReactI18next).init({
   lng: 'en',
   fallbackLng: 'en',
   resources: { en: { translations: {} } },
diff --git a/src/lib/api/logs.ts b/src/lib/api/logs.ts
index 8a1e430c..2d059ede 100644
--- a/src/lib/api/logs.ts
+++ b/src/lib/api/logs.ts
@@ -10,7 +10,7 @@ const buildAuthHeader = (token: string) => {
 /**
  * Validate response content type
  */
-const withExpectedContentTypeOrThrow = async (response: Response, expectedContentType: string) => {
+const withExpectedContentTypeOrThrow = (response: Response, expectedContentType: string) => {
   if (!response.ok) {
     throw new Error(`Request failed with status ${response.status}`)
   }
diff --git a/src/lib/api/orderbook.ts b/src/lib/api/orderbook.ts
index 36a66895..5fe18b8d 100644
--- a/src/lib/api/orderbook.ts
+++ b/src/lib/api/orderbook.ts
@@ -30,14 +30,14 @@ export const fetchOrderbook = async (): Promise<OrderbookResponse> => {
     throw new Error(`Failed to fetch orderbook: ${response.status}`)
   }
 
-  const data = await response.json()
+  const data: unknown = await response.json()
 
-  if (!data || !Array.isArray(data.offers)) {
+  if (!data || typeof data !== 'object' || !('offers' in data) || !Array.isArray(data.offers)) {
     console.warn('Unexpected orderbook response structure:', data)
     return { offers: [], fidelitybonds: [] }
   }
 
-  return data
+  return data as OrderbookResponse
 }
 
 export const refreshOrderbook = async (): Promise<Response> => {
diff --git a/src/lib/balanceSummary.test.ts b/src/lib/balanceSummary.test.ts
index 6509eec9..d2ffaffa 100644
--- a/src/lib/balanceSummary.test.ts
+++ b/src/lib/balanceSummary.test.ts
@@ -28,7 +28,7 @@ describe('BalanceSummary', () => {
           frozen: true,
         } as Utxo,
         {
-          value: 4,
+          value: 5,
           mixdepth: 0,
           // unfrozen and expired
           frozen: false,
@@ -39,10 +39,9 @@ describe('BalanceSummary', () => {
       now,
     )
 
-    expect(balanceSummary).not.toBeNull()
-    expect(balanceSummary!.calculatedTotalBalanceInSats).toBe(10)
-    expect(balanceSummary!.calculatedAvailableBalanceInSats).toBe(5)
-    expect(balanceSummary!.calculatedFrozenOrLockedBalanceInSats).toBe(5)
+    expect(balanceSummary.calculatedTotalBalanceInSats).toBe(11)
+    expect(balanceSummary.calculatedAvailableBalanceInSats).toBe(6)
+    expect(balanceSummary.calculatedFrozenOrLockedBalanceInSats).toBe(5)
   })
 
   it('should populate account balance data', () => {
@@ -71,9 +70,8 @@ describe('BalanceSummary', () => {
       now,
     )
 
-    expect(balanceSummary).not.toBeNull()
-    expect(balanceSummary!.calculatedTotalBalanceInSats).toBe(677777777)
-    expect(balanceSummary!.calculatedAvailableBalanceInSats).toBe(333333333)
-    expect(balanceSummary!.calculatedFrozenOrLockedBalanceInSats).toBe(344444444)
+    expect(balanceSummary.calculatedTotalBalanceInSats).toBe(677777777)
+    expect(balanceSummary.calculatedAvailableBalanceInSats).toBe(333333333)
+    expect(balanceSummary.calculatedFrozenOrLockedBalanceInSats).toBe(344444444)
   })
 })
diff --git a/src/lib/balanceSummary.ts b/src/lib/balanceSummary.ts
index 65509cbb..9955c69d 100644
--- a/src/lib/balanceSummary.ts
+++ b/src/lib/balanceSummary.ts
@@ -26,37 +26,8 @@ const calculateFrozenOrLockedBalance = (utxos: Utxo[], refTime: Milliseconds = D
 export const toBalanceSummary = (utxos: Utxo[], now?: Milliseconds): BalanceSummary => {
   const refTime = now !== undefined ? now : Date.now()
 
-  const utxosByAccount = (utxos ?? []).reduce(
-    (acc, utxo) => {
-      const key = `${utxo.mixdepth}`
-      acc[key] = acc[key] || []
-      acc[key].push(utxo as Utxo)
-      return acc
-    },
-    {} as { [key: string]: Utxo[] },
-  )
-
-  const totalCalculatedByAccount = Object.fromEntries(
-    Object.entries(utxosByAccount).map(([account, utxos]) => {
-      return [account, utxos.reduce((acc, utxo) => acc + utxo.value, 0)]
-    }),
-  )
-  const frozenOrLockedCalculatedByAccount = Object.fromEntries(
-    Object.entries(utxosByAccount).map(([account, utxos]) => {
-      return [account, calculateFrozenOrLockedBalance(utxos, refTime)]
-    }),
-  )
-
-  const walletTotalCalculated: AmountSats = Object.values(totalCalculatedByAccount).reduce(
-    (acc, totalSats) => acc + totalSats,
-    0,
-  )
-
-  const walletFrozenOrLockedCalculated: AmountSats = Object.values(frozenOrLockedCalculatedByAccount).reduce(
-    (acc, frozenOrLockedSats) => acc + frozenOrLockedSats,
-    0,
-  )
-
+  const walletTotalCalculated: AmountSats = utxos.reduce((acc, utxo) => acc + utxo.value, 0)
+  const walletFrozenOrLockedCalculated: AmountSats = calculateFrozenOrLockedBalance(utxos, refTime)
   const walletAvailableCalculated = walletTotalCalculated - walletFrozenOrLockedCalculated
 
   return {
diff --git a/src/lib/config.ts b/src/lib/config.ts
index 47197b87..ee0b65b6 100644
--- a/src/lib/config.ts
+++ b/src/lib/config.ts
@@ -10,18 +10,18 @@ const buildAuthHeader = (token: ApiToken): [string, string] => {
   return ['x-jm-authorization', `Bearer ${token}`]
 }
 
-async function loggingRequestInterceptor(request: Request) {
+function loggingRequestInterceptor(request: Request) {
   console.debug('[onRequest]', request)
   return request
 }
-async function loggingResponseInterceptor(response: Response) {
+function loggingResponseInterceptor(response: Response) {
   console.debug('[onResponse]', response)
   return response
 }
 
 const createJamAuthenticationMiddleware = () => {
   // eslint-disable-next-line unicorn/consistent-function-scoping -- false positive
-  return async (request: Request) => {
+  return (request: Request) => {
     const authState = authStore.getState().state
     if (authState?.auth?.token) {
       const authHeader = buildAuthHeader(authState.auth.token)
@@ -32,7 +32,7 @@ const createJamAuthenticationMiddleware = () => {
 }
 
 export const createApiClient = (): Client => {
-  const baseUrl: string = import.meta.env.VITE_JM_API_BASE_URL
+  const baseUrl = String(import.meta.env.VITE_JM_API_BASE_URL)
   const clientOptions: ClientOptions = { baseUrl }
 
   console.debug('Setting up JM API client…', clientOptions)
diff --git a/src/lib/hash.test.ts b/src/lib/hash.test.ts
index ff4a4caa..cfe6a244 100644
--- a/src/lib/hash.test.ts
+++ b/src/lib/hash.test.ts
@@ -2,7 +2,7 @@ import { describe, it, expect } from 'vitest'
 import { DEFAULT_PBKDF_ITERATIONS, hashPassword } from './hash'
 
 describe('hash', () => {
-  it('DEFAULT_PBKDF_ITERATIONS', async () => {
+  it('DEFAULT_PBKDF_ITERATIONS', () => {
     expect(DEFAULT_PBKDF_ITERATIONS).toBe(210_000)
   })
 
diff --git a/src/lib/utils.test.ts b/src/lib/utils.test.ts
index dcaa0037..cd2e94ff 100644
--- a/src/lib/utils.test.ts
+++ b/src/lib/utils.test.ts
@@ -116,7 +116,9 @@ describe('setIntervalDebounced', () => {
     const error = new Error('Test error')
     const callback = vi.fn().mockRejectedValueOnce(error).mockResolvedValueOnce(undefined)
     const onTimerIdChanged = vi.fn()
-    const onError = vi.fn((_, loop) => loop())
+    const onError = vi.fn((_, loop) => {
+      loop()
+    })
 
     setIntervalDebounced(callback, 1000, onTimerIdChanged, onError)
 
@@ -406,7 +408,7 @@ describe('delayedPromise', () => {
 
     // Initially the promise should not be resolved
     let resolved = false
-    delayPromise.then(() => {
+    void delayPromise.then(() => {
       resolved = true
     })
 
@@ -417,13 +419,14 @@ describe('delayedPromise', () => {
 
     // Now the promise should be resolved
     await expect(delayPromise).resolves.toBeUndefined()
+    expect(resolved).toBe(true)
   })
 
   it('should not resolve before 500ms', async () => {
     const delayPromise = delayedPromise(500)
 
     let resolved = false
-    delayPromise.then(() => {
+    void delayPromise.then(() => {
       resolved = true
     })
 
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 7fd28158..cf221e4f 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -75,10 +75,11 @@ export function setIntervalDebounced(
 ) {
   ;(function loop() {
     onTimerIdChanged(
-      setTimeout(async () => {
+      setTimeout(() => {
         try {
-          await callback()
-          loop()
+          Promise.resolve(callback())
+            .then(() => loop())
+            .catch((error) => onError(error, loop))
         } catch (error: unknown) {
           onError(error, loop)
         }
@@ -100,7 +101,7 @@ export const percentageToFactor = (val: number, precision = 6) => {
   return Number((val / 100).toFixed(precision))
 }
 
-export const isValidNumber = (val: number | undefined | null): val is number => {
+export const isValidNumber = (val: unknown): val is number => {
   return val !== undefined && typeof val === 'number' && !Number.isNaN(val)
 }
 
diff --git a/vite.config.ts b/vite.config.ts
index 21be9e68..573553c5 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -21,7 +21,7 @@ const {
 // https://vite.dev/config/
 export default defineConfig((): UserConfig => {
   if (!SUPPORTED_BACKENDS.includes(JAM_BACKEND)) {
-    throw new Error(`Unsupported backend: Use one of ${SUPPORTED_BACKENDS}`)
+    throw new Error(`Unsupported backend: Use one of [${SUPPORTED_BACKENDS.join(', ')}]`)
   }
 
   if (JAM_BACKEND === BACKEND_STANDALONE && JAM_API_PORT === undefined) {