workouts stats: PR/Recent display truncates fractional weights (e.g. 152.5 → 152)

[DTTerastar]

Command

```
liftoff-export workouts stats --exercise leg
```

Actual (excerpt)

```
Seated Leg Curl — 65 sessions
PR: 235x12 (May 2025)
Recent: 152x6 ← actual weight is 152.5

...
2026-04 152.5 ███████ ← chart shows the correct value
```

JSON output is correct (`bestWeight: 152.5`); only the markdown PR/Recent line truncates.

Expected

Display 152.5 (or whatever the underlying `bestWeight` is) consistent with the per-month chart and the JSON. Looks like an `int` cast in the markdown formatter.

Severity

minor

[DTTerastar]

@claude PR in a fix for this

[claude]

Claude finished @DTTerastar's task in 1m 23s —— View job • claude/issue-27-20260426-0014 • Create PR ➔

---

Fixing fractional weight truncation in PR/Recent display

• Gather context and understand the request
• Read CLAUDE.md for repo guidelines (no CLAUDE.md found)
• Find the markdown formatter causing int truncation
• Fix the fractional weight display bug
• Verify build is clean
• Commit and push changes

What was fixed

The printWeightSummary function in cmd/stats.go (lines 223–224) used %.0f to format weights, which discards any fractional part. The same issue existed in printSummariesTextDetail (line 338).

The fix replaces %.0f with formatWeight(), which already exists in the package and correctly handles both cases:

• Whole numbers → no decimal (e.g. 235)
• Fractional weights → one decimal place (e.g. 152.5)

Before:

PR:     235x12 (May 2025)
Recent: 152x6        ← 152.5 truncated

After:

PR:     235x12 (May 2025)
Recent: 152.5x6      ← correct

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