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feat(server): persist renderContent texture and cover it in asset lifecycle

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Add an optional renderContent field to canvas nodes across the go-zero API
type, domain node, SQLC models/queries, PostgreSQL schema, and mappers so a
lightweight transparent-WebP display texture persists alongside the original
content. Prefer renderContent for project thumbnails and main-canvas
previews, and treat both content and renderContent as protected/deletable
asset URLs during canvas asset cleanup. Extend round-trip coverage.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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liangxu
2026-07-16 20:45:56 +08:00
parent e7a0cc0b86
commit ee2c52bbc6
17 changed files with 75 additions and 46 deletions
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@@ -539,7 +539,7 @@ Returns `{ "code": 0, "msg": "success", "data": { "status": "done" } }` or the c
Saves canvas layout changes with a Lovart-style lightweight payload. The frontend posts to `/api/canva/project/saveProject`; `/api/projects/:id/canvas` remains as a compatibility route. The `canvas` value is a `SHAKKERDATA://` gzip+base64 encoded snapshot containing viewport, nodes, and connections. Legacy uncompressed `{ "viewport": ..., "nodes": ..., "connections": ... }` payloads are still accepted.
Canvas nodes may include optional `semanticContext`. CAD source nodes use `layerRole: "cad-vector"`; non-destructive crop siblings use `layerRole: "cad-crop"` and carry crop-specific context. PostgreSQL persists the field in `canvas_nodes.semantic_context`.
Canvas nodes may include optional `semanticContext` and `renderContent`. CAD source nodes use `layerRole: "cad-vector"`; non-destructive crop siblings use `layerRole: "cad-crop"` and carry crop-specific context. `content` remains the original SVG/CAD-derived source used by crop, download, and model-reference flows, while `renderContent` is an optional transparent WebP texture used only for fast canvas display. PostgreSQL persists both fields.
When a canvas image node disappears from the saved node list, its backing OSS asset is queued for asynchronous deletion after the canvas save succeeds.