Upgrade Project Management Google Sheet

I have a Google Sheet that drives my project-management workflow, but its formulas are messy and the interface feels clunky. Your job is to turn it into a polished, reliable tool that I can hand to anyone on the team with zero explanation.

What I need
• Audit every existing formula, remove errors, and replace ad-hoc calculations with clean, scalable alternatives—ARRAYFORMULA, QUERY, FILTER, or whichever functions make most sense.
• Build true task-tracking automation: when a task is marked done or its due date passes, the status column should update automatically.
• Add an intuitive priority system (e.g., drop-downs or data-validation chips) that colours or reorders tasks instantly.
• Introduce dependency tracking so that if Task B depends on Task A, date shifts or status changes cascade correctly.
• Refresh the layout—consistent fonts, frozen headers, conditional-formatting highlights, maybe a compact dashboard—so the sheet looks “priceless” and is effortless to read.
• I welcome any extra tweaks you believe will save clicks or prevent user error; nothing is off the table as long as the solution remains 100 % inside Google Sheets.

Deliverables
1. A revamped sheet with all requested automation and visual upgrades applied, using my current data set.
2. A short hand-over note explaining the new logic, so I can maintain it without you.
3. A change log summarising every structural adjustment.

Acceptance criteria
– No #REF!, #VALUE!, or circular-reference errors.
– Status, priority, and dependencies update automatically without scripts breaking.
– Existing data stays intact and readable.

If this sounds like your kind of tidy-up, let’s get started—I’m ready to grant edit access right away.