fix: allow single-date selection in timeline date range picker

[TimeToBuildBob]

Summary

When selecting a date range in the timeline, previously both start and end dates were required. This made it cumbersome to view a single day — you had to set both dates to the same value.

Changes:

• Make end date optional — if only start is set, defaults to showing that single day
• Add min/max constraints between date inputs to prevent invalid ranges (end before start)
• Validation (emptyDaterange, invalidDaterange, daterangeTooLong) updated to handle single-date case

Behavior:

• Select only a start date → shows that day (start to start+1day)
• Select both start and end → works as before (inclusive range)

Test plan

• Select only a start date, click Apply → shows that single day
• Select start and end dates → works as before
• Verify end date input has min constraint matching start date
• All 34 existing tests pass
• No regressions in "last duration" mode

Fixes #596

---

Important

Allows single-date selection in InputTimeInterval.vue by making end date optional and updating validation logic.

• Behavior:
  • End date is optional in InputTimeInterval.vue; defaults to single-day view if only start date is set.
  • Adds min/max constraints to date inputs to prevent invalid ranges.
  • Updates validation (emptyDaterange, invalidDaterange, daterangeTooLong) to handle single-date case.
• UI:
  • end input has min constraint matching start date.
  • end input has placeholder "(optional)".
• Logic:
  • value computed property in InputTimeInterval.vue updated to handle single-date selection.
  • emptyDaterange now returns false if start is set.
  • invalidDaterange and daterangeTooLong return false if end is not set.

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[ellipsis-dev]

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[greptile-apps]

Greptile Summary

Modified the timeline date range picker to allow single-date selection by making the end date optional. When only a start date is set, the component now defaults to showing that single day (start to start+1day). The validation logic (emptyDaterange, invalidDaterange, daterangeTooLong) was updated to handle the optional end date case correctly, and HTML5 min/max constraints were added to the date inputs to prevent invalid range entry at the UI level.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The changes are well-contained, logically sound, and backwards compatible. The logic correctly handles both single-date and date-range modes, validation is properly updated to handle the optional end date, and HTML5 constraints prevent invalid user input
• No files require special attention

Important Files Changed

Filename	Overview
src/components/InputTimeInterval.vue	Made end date optional in date range picker, allowing single-date selection with proper validation updates

_{Last reviewed commit: 5e8849e}

[greptile-apps]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.60%. Comparing base (934daca) to head (5e8849e).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #767      +/-   ##
==========================================
- Coverage   25.67%   25.60%   -0.08%     
==========================================
  Files          30       30              
  Lines        1741     1746       +5     
  Branches      316      314       -2     
==========================================
  Hits          447      447              
+ Misses       1272     1233      -39     
- Partials       22       66      +44     

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[TimeToBuildBob]

The Test (node-20, py-3.9, aw-server-rust master) check failure is a pre-existing upstream issue — the cleanup step tries to glob ~/.cache/activitywatch/log/*/*.log but aw-server-rust master doesn't write logs to that path. All actual test steps pass. PR #768 fixes this by using shopt -s nullglob in the cleanup steps.