Fix chart year filter allowing negative values

[tika]

Issue

• Fixes Year filter allows negative year values #206 (Year filter allows negative year values)

Who worked on this sprint/bug?

• Cursor agent

Who did what on this sprint/bug?

• Implemented year range sanitization and bounds normalization for the chart page custom year filter.

Features Implemented

• Added centralized year-range normalization utilities in src/app/chart/page.tsx.
• Clamped custom year input edits so values cannot go below allowed minimum bounds.
• Normalized query-param-backed startYear/endYear values so invalid negatives cannot persist in URL state or UI.
• Updated quick range presets (3y, 5y, all) to respect computed year bounds.

New files created

• None.

Existing files modified

• src/app/chart/page.tsx

Acceptance Criteria

• Negative years should not be selectable or should show warning: Completed by preventing negative year selection and display in the chart year filter.

Testing: how did you test?

• npm run lint ✅
• npm run build ❌ (fails in this environment due to missing DB env var: No database connection string was provided to neon() while collecting page data)

Features Not Implemented/Incomplete

• No warning UI was added because invalid negative values are prevented/clamped from being entered or persisted.

Bugs Discovered

• Build-time environment dependency issue unrelated to this change: missing database connection string in cloud environment.

Screenshots:

• Not included.

Tag Dan and Shayne

@danglorioso @shaynesidman

  

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Project	Deployment	Actions	Updated (UTC)
mhd	Ready	Preview, Comment	Apr 17, 2026 2:15am