Sync upstream v0.1.9 and refactor spreadsheet charts

[naaiyy]

What changed

• Sync the BaseBlocks fork with Firecrawl AnyDoc v0.1.9.
• Replace ad hoc XLSX chart range parsing with a bounded reference model that supports ordered multi-area references.
• Resolve live worksheet values first and use OOXML chart caches as a standards-based fallback.
• Isolate malformed chart parts so they cannot prevent a workbook from opening.
• Render normalized column, bar, line, pie, and combination chart groups with Apache ECharts.

Root cause

The old parser removed the sheet name by taking text after the final exclamation mark. A valid multi-area formula therefore became an invalid single-cell fragment and rejected the complete workbook.

Validation

• Full workspace type checks and tests
• Viewer and ingestion budgets
• Server and platform closure checks
• Package dry run and production audit
• Manual browser verification with event_revenue_simple.xlsx