Add a Workflows page that manages ComfyUI workflow JSON files as a
first-class library alongside loras/checkpoints/embeddings:
- opt-in via the new 'Workflow Management' settings toggle (default off)
- dedicated workflow folder roots with sidecar/preview support, separate
from ComfyUI's own workflow storage; 'Send to ComfyUI' loads a workflow
straight into the graph
- workflow scanner parses the graph document (UI/API format sniffing,
node classes, model/civitai refs) and persists the analysis in the
SQLite model cache
- settings UI: workflow folder paths editor in the Library tab and the
standalone Model Paths page
Fixes from sandbox E2E verification:
- include the workflow scanner in startup initialization so the page no
longer hangs on 'initializing' when enabled without folders
- add the missing workflows entry to the frontend page-state map (page
init crashed and the sidebar fell back to the loras tree without it)
- project workflow analysis fields through the scanner cache entry and
persist them in the model cache (new columns with auto-migration)
- keep symlinked paths intact in the directory picker (abspath instead
of resolve), so stored library paths match what the user sees on disk
Also rebuilds the vue-widgets bundle to sync it with web/comfyui/utils.js.
