bugfix: wrong display of human readable string (#15522)

I think after that we can close  #14790

# Description
So the issue was the tiny time delta between the moment the "date
form-human" command is executed, and the moment the value gets
displayed, using chrono_humanize.

When in inputing "in 30 seconds", we currently get:
```
[crates\nu-protocol\src\value\mod.rs:950:21] HumanTime::from(*val) = HumanTime(
    TimeDelta {
        secs: 29,
        nanos: 992402700,
    },
)```
And with "now":
```
crates\nu-protocol\src\value\mod.rs:950:21] HumanTime::from(*val) =
HumanTime(
    TimeDelta {
        secs: -1,
        nanos: 993393200,
    },
)
```

My solution is to round this timedelta to seconds and pass this to chrono_humanize.
Example: instead of passing (-1s + 993393200ns), we pass 0s.
Example: instead of passing (29s + 992402700ns), we pass 30s


# User-Facing Changes
Before 🔴 
```nushell
~> "in 3 days" | date from-human
Fri, 11 Apr 2025 09:06:36 +0200 (in 2 days)
~> "in 30 seconds" | date from-human
Tue, 8 Apr 2025 09:07:09 +0200 (in 29 seconds)
```

After those changes 🟢 
```nushell
~> "in 3 days" | date from-human
Fri, 11 Apr 2025 09:03:47 +0200 (in 3 days)
~> "in 30 seconds" | date from-human
Tue, 8 Apr 2025 09:04:28 +0200 (in 30 seconds)
```

# Tests + Formatting
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crates/nu-command/src/date/from_human.rs

@@ -103,19 +103,21 @@ fn helper(value: Value, head: Span) -> Value {
         }
     };
 
-    if let Ok(date) = from_human_time(&input_val, Local::now().naive_local()) {
+    let now = Local::now();
+
+    if let Ok(date) = from_human_time(&input_val, now.naive_local()) {
         match date {
             ParseResult::Date(date) => {
-                let time = Local::now().time();
+                let time = now.time();
                 let combined = date.and_time(time);
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = TimeZone::from_local_datetime(&local_offset, &combined)
                     .single()
                     .unwrap_or_default();
                 return Value::date(dt_fixed, span);
             }
             ParseResult::DateTime(date) => {
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = match local_offset.from_local_datetime(&date) {
                     chrono::LocalResult::Single(dt) => dt,
                     chrono::LocalResult::Ambiguous(_, _) => {
@@ -140,9 +142,9 @@ fn helper(value: Value, head: Span) -> Value {
                 return Value::date(dt_fixed, span);
             }
             ParseResult::Time(time) => {
-                let date = Local::now().date_naive();
+                let date = now.date_naive();
                 let combined = date.and_time(time);
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = TimeZone::from_local_datetime(&local_offset, &combined)
                     .single()
                     .unwrap_or_default();
@@ -151,19 +153,19 @@ fn helper(value: Value, head: Span) -> Value {
         }
     }
 
-    match from_human_time(&input_val, Local::now().naive_local()) {
+    match from_human_time(&input_val, now.naive_local()) {
         Ok(date) => match date {
             ParseResult::Date(date) => {
-                let time = Local::now().time();
+                let time = now.time();
                 let combined = date.and_time(time);
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = TimeZone::from_local_datetime(&local_offset, &combined)
                     .single()
                     .unwrap_or_default();
                 Value::date(dt_fixed, span)
             }
             ParseResult::DateTime(date) => {
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = match local_offset.from_local_datetime(&date) {
                     chrono::LocalResult::Single(dt) => dt,
                     chrono::LocalResult::Ambiguous(_, _) => {
@@ -188,9 +190,9 @@ fn helper(value: Value, head: Span) -> Value {
                 Value::date(dt_fixed, span)
             }
             ParseResult::Time(time) => {
-                let date = Local::now().date_naive();
+                let date = now.date_naive();
                 let combined = date.and_time(time);
-                let local_offset = *Local::now().offset();
+                let local_offset = *now.offset();
                 let dt_fixed = TimeZone::from_local_datetime(&local_offset, &combined)
                     .single()
                     .unwrap_or_default();

crates/nu-protocol/src/value/mod.rs

@@ -25,7 +25,7 @@ use crate::{
     engine::{Closure, EngineState},
     BlockId, Config, ShellError, Signals, Span, Type,
 };
-use chrono::{DateTime, Datelike, FixedOffset, Locale, TimeZone};
+use chrono::{DateTime, Datelike, Duration, FixedOffset, Local, Locale, TimeZone};
 use chrono_humanize::HumanTime;
 use fancy_regex::Regex;
 use nu_utils::{
@@ -953,7 +953,7 @@ impl Value {
                         } else {
                             val.to_rfc3339()
                         },
-                        HumanTime::from(*val),
+                        human_time_from_now(val),
                     )
                 }
             },
@@ -999,7 +999,7 @@ impl Value {
         match self {
             Value::Date { val, .. } => match &config.datetime_format.table {
                 Some(format) => self.format_datetime(val, format),
-                None => HumanTime::from(*val).to_string(),
+                None => human_time_from_now(val).to_string(),
             },
             Value::List { ref vals, .. } => {
                 if !vals.is_empty() && vals.iter().all(|x| matches!(x, Value::Record { .. })) {
@@ -4017,6 +4017,15 @@ fn operator_type_error(
     }
 }
 
+fn human_time_from_now(val: &DateTime<FixedOffset>) -> HumanTime {
+    let now = Local::now().with_timezone(val.offset());
+    let delta = *val - now;
+    let delta_seconds = delta.num_nanoseconds().unwrap_or(0) as f64 / 1_000_000_000.0;
+    let delta_seconds_rounded = delta_seconds.round() as i64;
+
+    HumanTime::from(Duration::seconds(delta_seconds_rounded))
+}
+
 #[cfg(test)]
 mod tests {
     use super::{Record, Value};