build(deps): replace htp with chrono-english

[pamburus]

Replace htp with chrono-english for human-readable time parsing

Summary

This PR replaces the htp time parsing library with chrono-english for parsing human-readable time expressions in filter options like --since and --until.

Motivation

The htp library is unmaintained, while chrono-english is an actively maintained library with broader community support and similar functionality for parsing English date/time expressions.

What Changed

❌ No Longer Supported

Expression	htp	chrono-english	Replacement
"friday at 19:00"	✅ Works	❌ Error	Use "last friday 19:00"
"last friday at 19:00"	✅ Works	❌ Error	Use "last friday 19:00"
"monday at 6 am"	✅ Works	❌ Error	Use "last monday 6:00"

✨ Newly Supported

Expression	htp	chrono-english	Notes
"last friday 19:00"	❌ Error	✅ Works	Time without "at" keyword
"last April"	❌ Error	✅ Works	Month references (past)
"april"	❌ Error	✅ Works	Bare month (auto-prefixed with "last")
"dec"	❌ Error	✅ Works	Short month name (auto-prefixed)
"1 April 2025"	❌ Error	✅ Works	Long date format
"2025-12-15"	❌ Error	✅ Works	ISO date format
"2025"	❌ Error	✅ Works	Year-only (Jan 1st)
"2026"	❌ Error	✅ Works	Year-only (Jan 1st)

✅ Works the Same in Both

Expression	Result	Use Case
"1 hour ago"	1 hour ago	✅ Common
"2 days ago"	2 days ago	✅ Common
"1 week ago"	1 week ago	✅ Common
"now"	Current time	✅ Common
"last friday"	Previous Friday	✅ Common
"last monday"	Previous Monday	✅ Common
"7am"	Today at 7 AM	✅ Common
"19:00"	Today at 19:00	✅ Common
-1h, -2d, -1w	Explicit past durations	✅ Common

Migration Guide

Must Update

If you're using weekday with "at" + time:

# Before (htp)
hl --since "friday at 19:00" app.log
hl --since "monday at 6 am" app.log

# After (chrono-english) - remove "at", add "last"
hl --since "last friday 19:00" app.log
hl --since "last monday 6:00" app.log

No Changes Needed

These continue to work identically:

# Relative durations (most common usage)
hl --since -1h app.log
hl --since -2d app.log
hl --since -1w app.log

# Natural language "ago" syntax
hl --since "1 hour ago" app.log
hl --since "2 days ago" app.log

# Named days
hl --since yesterday app.log
hl --since today app.log

# Weekdays with "last" modifier
hl --since "last friday" app.log
hl --since "last monday" app.log

# Bare times
hl --since 7am app.log
hl --since 19:00 app.log

New Capabilities

Month-based filtering

# Logs from last April
hl --since "last April" app.log

# Logs from specific date
hl --since "1 April 2025" app.log
hl --since "2025-12-15" app.log

Weekday with time (no "at" needed)

# Last Friday at 7 PM
hl --since "last friday 19:00" app.log

# Last Monday at 9 AM
hl --since "last monday 9:00" app.log

Common Patterns

Use Case	Syntax
Last hour	--since -1h or --since "1 hour ago"
Last day	--since -1d or --since yesterday
Last week	--since -1w or --since "1 week ago"
Last Friday	--since "last friday" or --since friday
Last Friday evening	--since "last friday 19:00" ✨
Last month (April)	--since "last April" or --since april ✨

✨ = New capability

Technical Details

• Dependency change: htp (git fork) → chrono-english 0.1 (crates.io)
• Dialect: Uses Dialect::Us for consistent date interpretation
• Backward compatibility workarounds:
  • Bare weekday names (e.g., "friday") are automatically prefixed with "last " to maintain htp behavior
  • Bare month names (e.g., "april", "dec") are automatically prefixed with "last " for consistent behavior
  • "today" and "yesterday" are adjusted to start-of-day (00:00) instead of current time
• Ambiguity prevention: Bare durations like 1h, 2d are rejected to prevent confusion
• Timezone handling: Honors --time-zone and --local options as before

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.19%. Comparing base (b1c1bc0) to head (a3794c7).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1256      +/-   ##
==========================================
+ Coverage   87.11%   87.19%   +0.08%     
==========================================
  Files          66       66              
  Lines       10805    10873      +68     
==========================================
+ Hits         9413     9481      +68     
  Misses       1392     1392              

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