feat: add QR scanner, improve UX, and simplify navigation

- Add live camera QR scanner for nsec/ncryptsec login
- Replace browser prompt() with proper password dialog for ncryptsec
- Add missing /notes/:id route for thread view navigation
- Remove explore section entirely (button, page, routes)
- Remove profile button from bottom nav, avatar now opens profile
- Remove "Notes" tab from feed, default to showing all posts/replies
- Add PasswordPromptProvider for secure password input
- Add SidebarDrawer for mobile navigation
- Add domain layer with value objects and adapters
- Various UI and navigation improvements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/components/AccountManager/BunkerLogin.tsx

@@ -1,56 +0,0 @@
-import { Button } from '@/components/ui/button'
-import { Input } from '@/components/ui/input'
-import { useNostr } from '@/providers/NostrProvider'
-import { Loader } from 'lucide-react'
-import { useState } from 'react'
-import { useTranslation } from 'react-i18next'
-
-export default function BunkerLogin({
-  back,
-  onLoginSuccess
-}: {
-  back: () => void
-  onLoginSuccess: () => void
-}) {
-  const { t } = useTranslation()
-  const { bunkerLogin } = useNostr()
-  const [pending, setPending] = useState(false)
-  const [bunkerInput, setBunkerInput] = useState('')
-  const [errMsg, setErrMsg] = useState<string | null>(null)
-
-  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    setBunkerInput(e.target.value)
-    setErrMsg(null)
-  }
-
-  const handleLogin = () => {
-    if (bunkerInput === '') return
-
-    setPending(true)
-    bunkerLogin(bunkerInput)
-      .then(() => onLoginSuccess())
-      .catch((err) => setErrMsg(err.message))
-      .finally(() => setPending(false))
-  }
-
-  return (
-    <>
-      <div className="space-y-1">
-        <Input
-          placeholder="bunker://..."
-          value={bunkerInput}
-          onChange={handleInputChange}
-          className={errMsg ? 'border-destructive' : ''}
-        />
-        {errMsg && <div className="text-xs text-destructive pl-3">{errMsg}</div>}
-      </div>
-      <Button onClick={handleLogin} disabled={pending}>
-        <Loader className={pending ? 'animate-spin' : 'hidden'} />
-        {t('Login')}
-      </Button>
-      <Button variant="secondary" onClick={back}>
-        {t('Back')}
-      </Button>
-    </>
-  )
-}