feat: multi-project dashboard with autosave indicators

[MrZang101]

Summary

• Multi-project dashboard — full-screen overlay replacing the old WelcomeModal/quickstart, showing all saved projects with the ability to open, create, delete, and switch between them
• Rich project cards — each card shows project name, workflow type badge (Image Gen, Video, 3D, Audio, LLM), node type pills with icons, primary model, node/edge counts, cost, and relative time
• Dashboard access from anywhere — grid icon in the header + floating "Projects" button on the canvas bottom-left
• Autosave visual indicators — green dot when auto-save is active, yellow pulsing dot while saving
• New API route /api/workflow-load to load workflow JSON from disk by path (enables opening projects from the dashboard)
• Extended WorkflowSaveConfig with createdAt, updatedAt, nodeCount, edgeCount, nodeTypeSummary, primaryModel metadata — all computed automatically on each save

Files changed (8 files, +832 lines)

File	Change
src/types/workflow.ts	Extended WorkflowSaveConfig with dashboard metadata fields
src/store/utils/localStorage.ts	Added deleteSaveConfig, getAllProjectsForDashboard, DashboardProject interface
src/app/api/workflow-load/route.ts	New — POST endpoint to load workflow from disk
src/store/workflowStore.ts	Added showDashboard, openProject, deleteProject state/actions; enriched save metadata
src/components/dashboard/ProjectCard.tsx	New — Rich project card with type badges, node pills, metadata
src/components/dashboard/ProjectDashboard.tsx	New — Full dashboard overlay (left sidebar + project list + actions)
src/components/WorkflowCanvas.tsx	Replaced WelcomeModal with ProjectDashboard; added floating Projects button
src/components/Header.tsx	Added dashboard button in header; autosave status indicators

Test plan

• Open app — dashboard should appear instead of old quickstart
• Create a new project via "New Project" button — verify it saves and appears in dashboard
• Click the grid icon in header — dashboard opens showing the project
• Click the floating "Projects" button on canvas — same result
• Create a second project — both appear sorted by recency
• Click a project card — loads the workflow
• Delete a project from dashboard — removed from list
• Reload page — projects persist across sessions
• Verify green dot appears next to save time (auto-save indicator)
• Trigger a save — yellow pulsing dot appears briefly
• Save a project with generate nodes — verify node type pills and model name appear on the card

🤖 Generated with Claude Code

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[shrimbly]

Hey @MrZang101 - if you're adding new UI changes, could you please include screenshots of the changes? Just saves me a bit of time