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## Summary When a workflow is loaded with missing models, users currently have no way to identify or resolve them from within the UI. This PR adds a full missing-model detection and resolution pipeline that surfaces missing models in the Errors tab, allowing users to install or import them without leaving the editor. ## Changes ### Missing Model Detection - Scan all COMBO widgets across root graph and subgraphs for model-like filenames during workflow load - Enrich candidates with embedded workflow metadata (url, hash, directory) when available - Verify asset-supported candidates against the asset store asynchronously to confirm installation status - Propagate missing model state to `executionErrorStore` alongside existing node/prompt errors ### Errors Tab UI — Model Resolution - Group missing models by directory (e.g. `checkpoints`, `loras`, `vae`) with collapsible category cards - Each model row displays: - Model name with copy-to-clipboard button - Expandable list of referencing nodes with locate-on-canvas button - **Library selector**: Pick an alternative from the user's existing models to substitute the missing model with one click - **URL import**: Paste a Civitai or HuggingFace URL to import a model directly; debounced metadata fetch shows filename and file size before confirming; type-mismatch warnings (e.g. importing a LoRA into checkpoints directory) are surfaced with an "Import Anyway" option - **Upgrade prompt**: In cloud environment, free-tier subscribers are shown an upgrade modal when attempting URL import - Separate "Import Not Supported" section for custom-node models that cannot be auto-resolved - Status card with live download progress, completion, failure, and category-mismatch states ### Canvas Integration - Highlight nodes and widgets that reference missing models with error indicators - Propagate missing-model badges through subgraph containers so issues are visible at every graph level ### Code Cleanup - Simplify `surfacePendingWarnings` in workflowService, remove stale widget-detected model merging logic - Add `flattenWorkflowNodes` utility to workflowSchema for traversing nested subgraph structures - Extract `MissingModelUrlInput`, `MissingModelLibrarySelect`, `MissingModelStatusCard` as focused single-responsibility components ## Testing - Unit tests for scan pipeline (`missingModelScan.test.ts`): enrichment, skip-installed, subgraph flattening - Unit tests for store (`missingModelStore.test.ts`): state management, removal helpers - Unit tests for interactions (`useMissingModelInteractions.test.ts`): combo select, URL input, import flow, library confirm - Component tests for `MissingModelCard` and error grouping (`useErrorGroups.test.ts`) - Updated `workflowService.test.ts` and `workflowSchema.test.ts` for new logic ## Review Focus - Missing model scan + enrichment pipeline in `missingModelScan.ts` - Interaction composable `useMissingModelInteractions.ts` — URL metadata fetch, library install, upload fallback - Store integration and canvas-level error propagation ## Screenshots https://github.com/user-attachments/assets/339a6d5b-93a3-43cd-98dd-0fb00681b66f ┆Issue is synchronized with this [Notion page](https://www.notion.so/PR-9743-feat-Surface-missing-models-in-Errors-tab-Cloud-3206d73d365081678326d3a16c2165d8) by [Unito](https://www.unito.io)