feat: add guided Loom imports to the Chrome extension

[richiemcilroy]

Changes

• Add a guided Loom connection flow with CSV preview, download, and Cap import actions using the extension’s shared visual styling.
• Add CSV inventory tools with column mapping, row validation, and omission reports.
• Add authorized, resumable Loom import batches and dashboard progress with downloadable results.
• Share Loom import processing between the dashboard and extension endpoints.

Greptile Summary

The PR adds guided Loom CSV capture and review to the Chrome extension, plus authorized resumable batch imports and dashboard status reporting.

• Adds extension-based Loom connection, CSV parsing, mapping, validation, persistence, and import workflows.
• Adds web endpoints and shared services for single and batch Loom imports.
• Adds batch progress reporting, downloadable results, and extensive unit and end-to-end coverage.

Confidence Score: 5/5

The PR appears safe to merge because no blocking failure remains in the eligible follow-up review scope.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/chrome-extension/src/importer/loom-capture.ts	Adds guarded Loom export interception with serialized capture and cleanup across completion paths.
apps/chrome-extension/src/importer/migration.tsx	Implements the guided Loom-to-Cap migration UI and coordinates capture, preview, authentication, and batch submission.
apps/chrome-extension/src/importer/inventory.ts	Adds CSV and JSON inventory parsing, column mapping, validation, duplicate handling, and report generation.
apps/web/app/api/extension/import-loom/batch/route.ts	Adds authenticated batch submission and status endpoints backed by shared authorization checks.
apps/web/lib/loom-batch-import.ts	Implements durable batch creation, row preparation, authorization, progress persistence, and status aggregation.
apps/web/workflows/import-loom-batch.ts	Orchestrates resumable row preparation and child import dispatch using persisted progress.
apps/web/lib/loom-import.ts	Refactors Loom import processing for reuse by dashboard and extension entry points.
apps/web/app/(org)/dashboard/import/loom/status/LoomBatchStatus.tsx	Adds dashboard polling and presentation for batch progress and downloadable results.

_{Reviews (2): Last reviewed commit: "fix: structure Loom storage error loggin..." | Re-trigger Greptile}

[richiemcilroy]

hey @greptileai, please re-review the PR