ENG-2084 Add schema import UI for Obsidian

[trangdoan982]

Summary

Adds the import modal UI and wires it into the command palette and settings.

• ImportSchemaPreviewSummary.tsx — per-category new/existing counts shown before the user applies the import
• ImportSpecsModal.tsx — two-screen modal: file picker screen → preview + selection screen (reuses SchemaSelectionModalBody + SchemaSelectionPanel from ENG-2083); delegates apply logic to applySchemaImportSelection from ENG-1977
• GeneralSettings.tsx — adds "Import discourse graph schema" entry to the settings UI
• registerCommands.ts — registers import-dg-schema command in the command palette

Stack

PR 5 of 5 for FEE-840. Stacks on #1264.

1. Shared foundation — ENG-1975 (ENG-1975 Define schema file contract and shared foundation for Obsidian export/import #1180)
2. Schema selection panel UI — ENG-2083 (ENG-2083 Add schema selection panel UI for Obsidian export/import #1262)
3. Schema export command — ENG-1976 (ENG-1976 Add schema export command to Obsidian #1263)
4. Schema import data layer — ENG-1977 (ENG-1977 Add schema import data layer for Obsidian #1264)
5. This PR — schema import UI (ENG-2084)

Test plan

• pnpm --filter @discourse-graphs/obsidian check-types passes
• Command palette: Import discourse graph schema opens the import modal
• Settings entry opens the import modal
• Picking a non-schema JSON or wrong-version file shows a clear error notice
• Preview summary shows correct new/existing counts per category
• Selection panel enforces dependency constraints
• Import applies correctly and creates new items as provisional
• Re-importing the same file creates no duplicates

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[linear-code]

ENG-2084

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
discourse-graph	Skipped		Jul 29, 2026 2:59am

[supabase]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.