[M3] Widget fx-canvas sandboxé + protocole postMessage hôte↔canvas (SF-M3-04, ST-M3-06) #44
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module:M0-setup
module:M1-stt
module:M1-stt
module:M2-ai
module:M2-ai
module:M3-rich
module:M3-rich
module:M4-bridge
module:M4-bridge
module:M5-bonus
module:M5-bonus
module:setup
priority:high
priority:high
priority:low
priority:low
priority:medium
priority:medium
type:chore
type:chore
type:feature
type:feature
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charles/my-fractal#44
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Contexte
Le bloc
fx-canvasest un widget HTML/JS libre (sandboxé) dans un WebView. Il réutiliseCanvasRendererde M2 et ajoute le protocolepostMessagebidirectionnel pour la communication hôte↔canvas (ST-M3-06).Critères d'acceptation
CanvasRendererdefractal-ai(ou le déplacer dansfractal-rich/fractal-ext)postMessagebidirectionnel :Resize { width, height },Action { name, data }ThemeChanged { dark_mode },Data(Value)640×480par défaut, configurable)Notes techniques
CanvasToHostetHostToCanvasenums serialisés en JSON viapostMessageJSfx-canvaset Canvas OpenClaw sont identiques techniquement)UnifiedContact+ schéma SQLitecontacts.db#48