Add Flux 1.1 cover image prompts to DOSSIER.md (section 5)

Front cover: kaleidoscope-as-portal with child silhouette and twelve
dreamworld vignettes in Folio Society / Edmund Dulac watercolor style.
Back cover: sparse constellation-of-vignettes on midnight blue, designed
for 35% opacity overlay behind the back-cover text block.
Includes technical notes on resolution, format, and file paths.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

DOSSIER.md

@@ -743,7 +743,95 @@ happy ending.
 
 ---
 
-## 5. Zusammenfassung Buch-Struktur
+## 5. Cover-Illustrationen (Flux 1.1 Prompts)
+
+> **Technische Hinweise:**
+> - Auflösung: mindestens **2800 × 2800 px** (quadratisch, 300 DPI, deckt 8.5 × 8.5 in + Beschnitt ab)
+> - Format: **PNG** (verlustfrei), dann als `images/cover/front.png` bzw. `images/cover/back.png` speichern
+> - Negativprompt für beide: `photorealistic, 3D render, CGI, harsh lighting, cartoon, anime flat style, text, watermark, border, frame`
+
+---
+
+### Vorderseite (`front.png`)
+
+```
+A breathtaking children's book cover illustration in the style of a Folio Society
+luxury edition, painted in luminous watercolor and gouache with fine ink linework.
+Square composition.
+
+Central motif: a giant ornate kaleidoscope resting on its side in a dark midnight
+blue meadow under a vast starlit sky, its open end glowing with warm amber and
+gold light. Radiating outward from the kaleidoscope's mouth are twelve softly lit
+vignette dreamscapes arranged in a circular halo — each a tiny magical world:
+a forest of glowing glass trees, a wooden sailing ship riding silver clouds, a moth
+ballet on moonlit threads, a clockmaker's lantern-lit workshop, a city of sleeping
+stone giants wrapped in moss, a dragon blowing iridescent soap bubbles, a silver
+mountain picnic under falling stars, a teacup sailboat on a mirror lake, a library
+whose books glow from within, a garden of whispering paper lanterns, an echo made
+visible as golden sound waves through a starry canyon, a loom weaving dreams from
+colored light.
+
+In the foreground, a small child in a white nightgown sits in the grass, back to
+the viewer, gazing into the kaleidoscope with wonder.
+
+Color palette: deep prussian blue and near-black night sky, warm amber and soft
+gold emanating from the kaleidoscope, each vignette dreamworld tinted in its own
+jewel tone — sapphire, amethyst, emerald, rose gold. Fine gold shimmer on the
+kaleidoscope barrel. Cream and ivory in the moonlit grass.
+
+Style: painterly, hand-crafted, no photorealism. Inspired by Efteling illustration,
+Studio Ghibli background art, and Edmund Dulac fairy tale paintings. Rich texture,
+visible brushwork, delicate ink outlines, subtle paper grain. Warm and mysterious,
+inviting and slightly magical. Premium print quality, high detail.
+
+Aspect ratio 1:1. No text, no borders, no frames.
+```
+
+---
+
+### Rückseite (`back.png`)
+
+> Das Bild wird im Template mit **35 % Deckkraft** über dem dunklen Hintergrund gerendert
+> — es dient als atmosphärische Textur, nicht als Hauptmotiv. Deshalb: breite, ruhige
+> Komposition, keine dichten Details in der Bildmitte (wo der Klappentext steht).
+
+```
+A dreamy, atmospheric children's book endpaper illustration in soft watercolor and
+gouache. Square composition, intended as a translucent background layer.
+
+Wide, sparse composition: a deep midnight blue sky fills most of the image.
+Scattered across it — small, luminous vignettes from twelve fairy tale worlds,
+arranged loosely like constellations rather than crowded together. Each vignette
+is a tiny glowing island of detail floating in the dark:
+
+A glass tree with silver leaves. A teacup adrift on a river of starlight.
+A friendly red dragon breathing soap bubbles. A moth with iridescent wings.
+A clockwork gear made of chocolate. A unicorn's silver mane. A wise owl on a
+branch. A lantern glowing gold. A flying book trailing sparks. A sleeping giant
+with moss on his chest. A dandelion carrying a boy into the stars. A ship
+sailing through clouds.
+
+The vignettes are small and delicate — they should feel like glowing embers in a
+dark sky, not a busy scene. Large empty areas of deep prussian blue and midnight
+indigo between them, soft and restful.
+
+In the lower third of the image, a faint luminous mist settles — leaving the
+center and bottom largely clear for overlaid text.
+
+Color palette: deep prussian blue, midnight indigo, very dark navy, with warm
+amber and pale gold accents on each glowing vignette. No bright backgrounds, no
+light areas except the tiny illuminated motifs themselves.
+
+Style: loose, painterly watercolor washes. Folio Society / fairy tale annual
+aesthetic. Visible paper grain, soft edges, ink so fine it disappears into the
+dark. Quiet, poetic, unhurried.
+
+Aspect ratio 1:1. No text, no borders, no frames.
+```
+
+---
+
+## 6. Zusammenfassung Buch-Struktur
 
 | # | Titel | Hauptfigur | Farbpalette | Phantastisches Element |
 |---|---|---|---|---|