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feat(apercu): revient au lecteur PDF natif du moteur

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Le rendu maison sur <canvas> dimensionnait chaque page à la largeur du
volet, sans jamais pouvoir aller au-delà : sur une page A4 (595,3 pt) dans
un volet de 495 px — soit 40 % d'une fenêtre bureau de 1280 px — cela
faisait une échelle de 0,83x, et les tableaux du CRG composés en 7 pt
tombaient à 5,8 px de haut. Illisible, sans recours : aucun zoom, aucun
re-rendu au redimensionnement (la canvas était simplement étirée en CSS),
et devicePixelRatio à 1 sur écran non-HiDPI, donc aucun suréchantillonnage.

L'<iframe> rend au moteur le zoom, la recherche, l'impression et la
sélection de texte, tous absents jusqu'ici, et redessine à chaque niveau
de zoom. Le document s'ouvre à `#zoom=100` : « ajuster à la largeur » ne
sauverait rien dans un volet étroit (54 %, soit 5 px pour du 7 pt) alors
qu'à 100 % le 7 pt fait 9,3 px. Les mots-clés `page-width`, `view=FitH` et
`pagemode=none` sont ignorés par le lecteur de Chrome ; une valeur
numérique est honorée.

Un lien « ouvrir dans un nouvel onglet » sert de porte de sortie si le
moteur n'embarque pas de lecteur PDF.

pdfjs-dist n'a plus d'utilisateur : bundle principal 966 Ko -> 492 Ko, et
le worker de 1,3 Mo n'est plus émis.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Bertrand Benjamin
2026-08-22 21:09:31 +02:00
parent b15f5c95b6
commit e2e2f5bc0e
4 changed files with 117 additions and 402 deletions
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278
frontend/package-lock.json generated
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@@ -9,7 +9,6 @@
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@@ -2187,18 +1921,6 @@
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