fix(config): change default show mode for time and level fields to 'always'

[pamburus]

Change show mode for time and level fields to always

Summary

Changes the default show setting from auto to always for the predefined time and level fields in the default configuration.

Motivation

The auto mode conditionally shows/hides fields based on whether certain field variants are present in the logs. While this can make output more compact, it leads to inconsistent formatting:

• Headers and field positions shift depending on log content
• Output format becomes unpredictable
• Confusing user experience when fields appear/disappear

The always mode provides consistent, predictable output format regardless of log content.

Changes

Configuration Changes

File: etc/defaults/config.toml

Changed for both time and level predefined fields:

-show = "auto"
+show = "always"

Also added inline documentation explaining the available options:

# Determines when to show the time field automatically based on the presence of time variants.
# Options: ["always", "auto"].
show = "always"

Behavior Impact

Before (auto mode):

• Time field only shown when timestamp variants detected
• Level field only shown when level variants detected
• Output format varies based on log content

After (always mode):

• Time field always shown (with placeholders if no timestamp)
• Level field always shown (with placeholders if no level)
• Consistent output format across all logs

Examples

Before (show = "auto")

message without timestamp
2026-01-01 10:30:45.123 message with timestamp
[INF] message with level
2026-01-01 10:30:45.123 [INF] message with both

After (show = "always")

####-##-## ##:##:##.### [###] message without timestamp
2026-01-01 10:30:45.123 [###] message with timestamp
####-##-## ##:##:##.### [INF] message with level
2026-01-01 10:30:45.123 [INF] message with both

Migration

Users who prefer the old behavior can override in user config (~/.config/hl/config.toml):

[fields.predefined.time]
show = "auto"

[fields.predefined.level]
show = "auto"

Breaking Change

⚠️ This is a minor breaking change in default behavior. The output format will be more consistent but may look different for users relying on auto-hiding of these fields.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.92%. Comparing base (314b309) to head (6f6a324).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1264   +/-   ##
=======================================
  Coverage   87.92%   87.92%           
=======================================
  Files          67       67           
  Lines       11567    11567           
=======================================
  Hits        10170    10170           
  Misses       1397     1397           

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