Remove obsolete 'Connect with Nostr' message from presentation page

**Motivations :**
* Remove outdated message that appears after account creation/import
* Clean up dead code and unused translation keys
* Simplify presentation page UX now that key creation/import is available

**Root causes :**
* Message 'Connectez-vous avec Nostr pour créer votre article de présentation' was displayed even when account exists
* NotConnected component and translation keys were no longer needed after implementing key creation/import

**Correctifs :**
* Removed NotConnected component and its message
* Removed presentation.notConnected translation keys from all locale files
* Simplified display to show ConnectButton directly when no pubkey is available
* Added auto-loading of pubkey when account exists but pubkey not yet loaded

**Evolutions :**
* Presentation form now displays immediately when account exists (even if not unlocked)
* Better UX: users can see the form and will get error message if they try to publish without unlocking

**Page affectées :**
* components/AuthorPresentationEditor.tsx
* locales/fr.txt
* locales/en.txt
* public/locales/fr.txt
* public/locales/en.txt

components/AuthorPresentationEditor.tsx

@@ -1,4 +1,4 @@
-import { useState, useCallback } from 'react'
+import { useState, useCallback, useEffect, type FormEvent } from 'react'
 import { useNostrAuth } from '@/hooks/useNostrAuth'
 import { useAuthorPresentation } from '@/hooks/useAuthorPresentation'
 import { ArticleField } from './ArticleField'
@@ -17,19 +17,6 @@ interface AuthorPresentationDraft {
 
 const ADDRESS_PATTERN = /^(1|3|bc1)[a-zA-Z0-9]{25,62}$/
 
-function NotConnected() {
-  return (
-    <div className="border border-neon-cyan/20 rounded-lg p-6 bg-cyber-dark/50">
-      <div className="flex flex-col items-center gap-4">
-        <p className="text-center text-cyber-accent">
-          {t('presentation.notConnected')}
-        </p>
-        <ConnectButton />
-      </div>
-    </div>
-  )
-}
-
 function SuccessNotice() {
   return (
     <div className="border border-neon-green/50 rounded-lg p-6 bg-neon-green/10">
@@ -162,12 +149,12 @@ function PresentationForm({
   validationError: string | null
   error: string | null
   loading: boolean
-  handleSubmit: (e: React.FormEvent) => Promise<void>
+  handleSubmit: (e: FormEvent<HTMLFormElement>) => Promise<void>
   userName: string
 }) {
   return (
     <form
-      onSubmit={(e) => {
+      onSubmit={(e: FormEvent<HTMLFormElement>) => {
         void handleSubmit(e)
       }}
       className="border border-neon-cyan/20 rounded-lg p-6 bg-cyber-dark space-y-4"
@@ -190,7 +177,7 @@ function useAuthorPresentationState(pubkey: string | null) {
   const [validationError, setValidationError] = useState<string | null>(null)
 
   const handleSubmit = useCallback(
-    async (e: React.FormEvent) => {
+    async (e: FormEvent<HTMLFormElement>) => {
       e.preventDefault()
       const address = draft.mainnetAddress.trim()
       if (!ADDRESS_PATTERN.test(address)) {
@@ -217,8 +204,14 @@ function AuthorPresentationFormView({
 }) {
   const state = useAuthorPresentationState(pubkey)
 
-  if (!connected || !pubkey) {
-    return <NotConnected />
+  if (!pubkey) {
+    return (
+      <div className="border border-neon-cyan/20 rounded-lg p-6 bg-cyber-dark/50">
+        <div className="flex flex-col items-center gap-4">
+          <ConnectButton />
+        </div>
+      </div>
+    )
   }
   if (state.success) {
     return <SuccessNotice />
@@ -240,7 +233,16 @@ function AuthorPresentationFormView({
   )
 }
 
+function useAutoLoadPubkey(accountExists: boolean | null, pubkey: string | null, connect: () => Promise<void>) {
+  useEffect(() => {
+    if (accountExists === true && !pubkey) {
+      void connect()
+    }
+  }, [accountExists, pubkey, connect])
+}
+
 export function AuthorPresentationEditor() {
-  const { connected, pubkey, profile } = useNostrAuth()
+  const { connected, pubkey, profile, accountExists, connect } = useNostrAuth()
+  useAutoLoadPubkey(accountExists, pubkey ?? null, connect)
   return <AuthorPresentationFormView pubkey={pubkey ?? null} connected={connected} profile={profile} />
 }

locales/en.txt

@@ -59,7 +59,6 @@ presentation.title=Create your presentation article
 presentation.description=This article is required to publish on zapwall.fr. It allows readers to know you and sponsor you.
 presentation.success=Presentation article created!
 presentation.successMessage=Your presentation article has been created successfully. You can now publish articles.
-presentation.notConnected=Connect with Nostr to create your presentation article
 presentation.profileNote=This profile data is specific to zapwall.fr and may differ from your Nostr profile.
 presentation.field.picture=Profile picture
 presentation.field.picture.help=Profile image for your author page (max 5MB, formats: PNG, JPG, WebP)

locales/fr.txt

@@ -60,7 +60,6 @@ presentation.description=Cet article est obligatoire pour publier sur zapwall.fr
 presentation.profileNote=Les données de ce profil sont spécifiques à zapwall.fr et peuvent différer de votre profil Nostr.
 presentation.success=Article de présentation créé !
 presentation.successMessage=Votre article de présentation a été créé avec succès. Vous pouvez maintenant publier des articles.
-presentation.notConnected=Connectez-vous avec Nostr pour créer votre article de présentation
 
 # Filters
 filters.clear=Effacer tout

public/locales/en.txt

@@ -59,7 +59,6 @@ presentation.title=Create your presentation article
 presentation.description=This article is required to publish on zapwall.fr. It allows readers to know you and sponsor you.
 presentation.success=Presentation article created!
 presentation.successMessage=Your presentation article has been created successfully. You can now publish articles.
-presentation.notConnected=Connect with Nostr to create your presentation article
 presentation.profileNote=This profile data is specific to zapwall.fr and may differ from your Nostr profile.
 presentation.field.picture=Profile picture
 presentation.field.picture.help=Profile image for your author page (max 5MB, formats: PNG, JPG, WebP)

public/locales/fr.txt

@@ -59,7 +59,6 @@ presentation.title=Créer votre article de présentation
 presentation.description=Cet article est obligatoire pour publier sur zapwall.fr. Il permet aux lecteurs de vous connaître et de vous sponsoriser.
 presentation.success=Article de présentation créé !
 presentation.successMessage=Votre article de présentation a été créé avec succès. Vous pouvez maintenant publier des articles.
-presentation.notConnected=Connectez-vous avec Nostr pour créer votre article de présentation
 presentation.profileNote=Les données de ce profil sont spécifiques à zapwall.fr et peuvent différer de votre profil Nostr.
 presentation.field.picture=Photo de profil
 presentation.field.picture.help=Image de profil pour votre page auteur (max 5Mo, formats: PNG, JPG, WebP)