v3.0.1: qualité & stabilité — tests, sécurité, UX consolidée

🧪 Tests: 73 → 130 (+57 tests)
- Upload API, labels sync, commit history (401/400/502/cached)
- File create/update (sha=null, sha=abc)
- Admin delete cascade (12 tests: oauth, tags, workspaces, pages…)
- Gitea status (linked/unlinked/disconnect)
- OAuth link mode (session, redirect, callback)

🔒 Sécurité
- ContentSecurityPolicyMiddleware (CSP headers)
- RateLimitMiddleware (100 req/min/IP)
- Pydantic models: ErrorResponse, SuccessResponse
- Input validation upload (10MB, allowed extensions)
- Pydantic request models

🎨 UX
- static/css/design-tokens.css (500 lines, thèmes + skeletons)
- Toast system: 16 alert() remplacés par toast()
- 59 lignes CSS dupliquées retirées (6 templates)
- Skeletons cohérents sur toutes les vues

⚡ Performance
- Cache TTL sur get_file_commits (consistant avec les autres méthodes)

app/templates/page_editor.html

@@ -660,9 +660,9 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
         invitePerson(){if(!this.inviteEmail.trim())return;this.accessList.push({email:this.inviteEmail,permission:this.invitePermission,permOpen:false});this.inviteEmail='';},
         removeAccess(email){this.accessList=this.accessList.filter(a=>a.email!==email);},
         exportPage(){this.moreOpen=false;},
-        duplicatePage(){this.moreOpen=false;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages?title=${encodeURIComponent(this.pageTitle+' copy')}&section=Private&project=${encodeURIComponent('{{ workspace_key }}')}`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(r=>r.json()).then(d=>{window.location.href=`/pages/${d.id}`;}).catch(()=>{alert('Duplicate failed');});},
+        duplicatePage(){this.moreOpen=false;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages?title=${encodeURIComponent(this.pageTitle+' copy')}&section=Private&project=${encodeURIComponent('{{ workspace_key }}')}`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(r=>r.json()).then(d=>{window.location.href=`/pages/${d.id}`;}).catch(()=>{window.showToast('Duplicate failed','error');});},
         movePage(){this.moreOpen=false;},
-        deletePage(){this.moreOpen=false;if(!confirm('Move to Trash?'))return;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages/${this.pid}/trash`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(()=>{window.location.href='/';}).catch(()=>{alert('Failed');});},
+        deletePage(){this.moreOpen=false;if(!confirm('Move to Trash?'))return;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages/${this.pid}/trash`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(()=>{window.location.href='/';}).catch(()=>{window.showToast('Failed','error');});},
 
         onKd(e){
           const ab=this.getActiveBlock();if(!ab)return;