fix(studio): resolve outstanding Sentry issues (#44106)

## Summary

Fixes several high-impact Sentry errors reported in production.

### Fixed Issues

- **[SUPABASE-APP-EJ3](https://supabase.sentry.io/issues/7356937474/)**
— `TypeError: Cannot read properties of undefined (reading 'direct')`.
`connectionStringPooler` could be `undefined` when the connection source
doesn't match any key in the connection strings map. Added an early
return guard in `resolveConnectionString`.

- **[SUPABASE-APP-B17](https://supabase.sentry.io/issues/7117468199/)**
— `RangeError: Invalid time zone specified: Etc/Unknown`.
`dayjs.tz.guess()` returns `"Etc/Unknown"` for some users with
misconfigured browser/OS timezones. Added a shared
`guessLocalTimezone()` helper that validates the guessed timezone via
`Intl.DateTimeFormat` and falls back to UTC. Applied across all 4 call
sites.

- **[SUPABASE-APP-BCM](https://supabase.sentry.io/issues/7192934901/)**
— `TypeError: Cannot convert undefined or null to object`.
`Object.entries(definition.properties)` crashed when a JSON schema
definition existed but had no `properties` field. Updated the guard to
check `definition?.properties` instead of just `definition`.
- https://supabase.sentry.io/issues/7357780302/?project=5459134
- https://supabase.sentry.io/issues/7358344652/?project=5459134
- https://supabase.sentry.io/issues/7096737077/?project=5459134

## Test plan

- [ ] Verify connect dialog renders without errors when connection data
is still loading
- [ ] Verify API docs Entity view handles schema definitions without
properties
- [ ] Verify charts/tooltips display correct timezone labels

---------

Co-authored-by: Ivan Vasilov <vasilov.ivan@gmail.com>

apps/studio/components/interfaces/Auth/OAuthApps/OAuthAppsList.tsx

@@ -132,7 +132,7 @@ export const OAuthAppsList = () => {
 
     return filtered.sort((a, b) => {
       if (sortCol === 'name') {
-        return a.client_name.localeCompare(b.client_name) * orderMultiplier
+        return (a.client_name || '').localeCompare(b.client_name || '') * orderMultiplier
       }
       if (sortCol === 'client_type') {
         return a.client_type.localeCompare(b.client_type) * orderMultiplier

apps/studio/components/interfaces/ConnectSheet/ConnectionString.utils.ts

@@ -18,8 +18,10 @@ export const resolveConnectionString = ({
 }: {
   connectionMethod: ConnectionStringMethod
   useSharedPooler: boolean
-  connectionStringPooler: ConnectionStringPooler
+  connectionStringPooler: ConnectionStringPooler | undefined
 }) => {
+  if (!connectionStringPooler) return ''
+
   if (connectionMethod === 'direct') {
     return connectionStringPooler.direct ?? ''
   }

apps/studio/components/interfaces/Database/Backups/PITR/PITR.utils.ts

@@ -1,4 +1,5 @@
 import dayjs from 'dayjs'
+import { guessLocalTimezone } from 'lib/dayjs'
 import { ALL_TIMEZONES } from './PITR.constants'
 import type { Time } from './PITR.types'
 import type { ProjectSelectedAddon } from 'data/subscriptions/types'
@@ -17,7 +18,7 @@ export const getDatesBetweenRange = (startDate: dayjs.Dayjs, endDate: dayjs.Dayj
 }
 
 export const getClientTimezone = () => {
-  const defaultTz = dayjs.tz.guess()
+  const defaultTz = guessLocalTimezone()
   const utcTz = ALL_TIMEZONES.find((option) => option.value === 'UTC')
   const timezone = ALL_TIMEZONES.find((option) => {
     if (option.utc.includes(defaultTz)) return option

apps/studio/components/interfaces/ProjectAPIDocs/Content/Entity.tsx

@@ -39,7 +39,7 @@ export const Entity = ({ language, apikey = '', endpoint = '' }: ContentProps) =
 
   const definition = jsonSchema?.definitions?.[resource]
   const columns =
-    definition !== undefined
+    definition?.properties !== undefined
       ? Object.entries(definition.properties).map(([id, val]: any) => ({
           ...val,
           id,

apps/studio/components/interfaces/QueryInsights/QueryInsightsChart/QueryInsightsChartTooltip.tsx

@@ -1,4 +1,5 @@
 import dayjs from 'dayjs'
+import { guessLocalTimezone } from 'lib/dayjs'
 import type { TooltipProps } from 'recharts'
 import { formatDuration } from '../QueryInsightsTable/QueryInsightsTable.utils'
 import { isTimeMetric } from './QueryInsightsChart.utils'
@@ -7,7 +8,7 @@ export const QueryInsightsChartTooltip = ({ active, payload }: TooltipProps<numb
   if (!active || !payload?.length) return null
 
   const time = payload[0]?.payload?.time
-  const localTimeZone = dayjs.tz.guess()
+  const localTimeZone = guessLocalTimezone()
 
   return (
     <div className="grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg px-2.5 py-1.5 text-xs shadow-xl">

apps/studio/components/ui/Charts/ComposedChart.utils.tsx

@@ -1,6 +1,7 @@
 'use client'
 
 import dayjs from 'dayjs'
+import { guessLocalTimezone } from 'lib/dayjs'
 import { formatBytes } from 'lib/helpers'
 import { useState } from 'react'
 import { cn, Tooltip, TooltipContent, TooltipProvider, TooltipTrigger } from 'ui'
@@ -193,7 +194,7 @@ export const CustomTooltip = ({
       ...(maxValueAttribute?.attribute ? [maxValueAttribute.attribute] : []),
     ]
 
-    const localTimeZone = dayjs.tz.guess()
+    const localTimeZone = guessLocalTimezone()
 
     const rawPayload = payload.map((entry: any) => ({
       ...entry,

apps/studio/components/ui/ProjectUpgradeFailedBanner.tsx

@@ -1,5 +1,6 @@
 import { DatabaseUpgradeStatus } from '@supabase/shared-types/out/events'
 import dayjs from 'dayjs'
+import { guessLocalTimezone } from 'lib/dayjs'
 import { X } from 'lucide-react'
 import { useEffect, useState } from 'react'
 
@@ -28,7 +29,7 @@ export const ProjectUpgradeFailedBanner = () => {
   const isFailed = status === DatabaseUpgradeStatus.Failed
   const initiatedAt = dayjs
     .utc(initiated_at ?? 0)
-    .tz(dayjs.tz.guess())
+    .tz(guessLocalTimezone())
     .format('DD MMM YYYY HH:mm:ss')
 
   const subject = 'Upgrade%20failed%20for%20project'

apps/studio/lib/dayjs.ts

@@ -0,0 +1,11 @@
+import dayjs from 'dayjs'
+
+export function guessLocalTimezone(): string {
+  const guess = dayjs.tz.guess()
+  try {
+    Intl.DateTimeFormat(undefined, { timeZone: guess })
+    return guess
+  } catch {
+    return 'UTC'
+  }
+}