PWI improvements (#3489)

* Enable home and feeds on the PWI

* Add global SigninDialog to drive useRequireAuth()

* Tweak desktop styles

* Make the logo in leftnav PWI a clickable home link

* Add label

* Improve dialog on web

* Fix query key

* Go to home after signout from settings screen

* Filter out feeds from the discover listing for logged out users which are known to break without auth

* Update profile header follow/subscribe to give signin prompt

* Show profile feeds tabs on pwi

* Add language selector to account creation footer and pwi left nav desktop

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Co-authored-by: dan <dan.abramov@gmail.com>

src/screens/Signup/index.tsx

@@ -22,6 +22,7 @@ import {StepCaptcha} from '#/screens/Signup/StepCaptcha'
 import {StepHandle} from '#/screens/Signup/StepHandle'
 import {StepInfo} from '#/screens/Signup/StepInfo'
 import {atoms as a, useBreakpoints, useTheme} from '#/alf'
+import {AppLanguageDropdown} from '#/components/AppLanguageDropdown'
 import {Button, ButtonText} from '#/components/Button'
 import {Divider} from '#/components/Divider'
 import {InlineLinkText} from '#/components/Link'
@@ -212,10 +213,14 @@ export function Signup({onPressBack}: {onPressBack: () => void}) {
 
             <Divider />
 
-            <View style={[a.w_full, a.py_lg]}>
-              <Text style={[t.atoms.text_contrast_medium]}>
+            <View
+              style={[a.w_full, a.py_lg, a.flex_row, a.gap_lg, a.align_center]}>
+              <AppLanguageDropdown />
+              <Text style={[t.atoms.text, !gtMobile && a.text_md]}>
                 <Trans>Having trouble?</Trans>{' '}
-                <InlineLinkText to={FEEDBACK_FORM_URL({email: state.email})}>
+                <InlineLinkText
+                  to={FEEDBACK_FORM_URL({email: state.email})}
+                  style={[!gtMobile && a.text_md]}>
                   <Trans>Contact support</Trans>
                 </InlineLinkText>
               </Text>