---
phase: quick-13
plan: 13
subsystem: backend
tags: [lint, cleanup, mechanical]
dependency_graph:
  requires: []
  provides: [clean-lint-output]
  affects: []
tech_stack:
  added: []
  patterns: [golines-line-length, wsl-whitespace, errcheck-ignored-returns, intrange-loops]
key_files:
  created: []
  modified:
    - backend/database/testhelper.go
    - backend/events/cmd/genevents/main.go
    - backend/library/library.go
    - backend/database/search_test.go
    - backend/config/config_test.go
    - backend/queue/navigation_test.go
    - backend/queue/queue_test.go
    - backend/library/scan_test.go
    - backend/favorites/config_test.go
    - backend/theme/config_test.go
    - backend/player/volume_test.go
    - backend/queue/persistence_test.go
decisions: []
metrics:
  duration: ~32m
  completed: "2026-03-05"
---

# Quick Task 13: Fix Linting Issues Summary

**One-liner:** Zero golangci-lint issues via mechanical fixes across 12 Go files (errcheck, golines, gofumpt, wsl, nlreturn, intrange, unused)

## What Was Done

Fixed all 31+ golangci-lint issues across 12 files with zero behavioral changes:

### Issue Categories Fixed

| Category | Count | Fix |
|----------|-------|-----|
| errcheck | 4 | Assign error returns to `_` (db.Close, tmp.Close, os.Remove) |
| golines | 10+ | Break long lines (t.Errorf, SQL strings, struct literals) |
| gofumpt | 1 | Reformat ScanProgress struct literal (orphans phase) |
| wsl | 17 | Add blank lines before declarations, ranges, if-statements; remove trailing comments before `}` |
| nlreturn | 3 | Add blank line before return statements |
| intrange | 2 | Convert `for i := 0; i < n; i++` to `for i := range n` |
| unused | 2 | Remove unused `artistEntry` and `albumEntry` type definitions |

### Files Modified

**Main source files (3):**
- `backend/database/testhelper.go` — errcheck fix for `db.Close()`
- `backend/events/cmd/genevents/main.go` — errcheck, nlreturn, wsl, gofumpt fixes
- `backend/library/library.go` — gofumpt struct formatting, wsl spacing

**Test files (9):**
- `backend/database/search_test.go` — golines, unused types, wsl fixes
- `backend/config/config_test.go` — golines, wsl trailing comment fix
- `backend/queue/navigation_test.go` — intrange, golines, wsl fixes
- `backend/queue/queue_test.go` — intrange, nlreturn, golines fixes
- `backend/queue/persistence_test.go` — golines fixes
- `backend/library/scan_test.go` — golines, wsl fixes
- `backend/favorites/config_test.go` — wsl fix
- `backend/theme/config_test.go` — wsl fixes
- `backend/player/volume_test.go` — golines fixes

## Commits

| Hash | Message |
|------|---------|
| e1a95e6 | fix(quick-13): resolve lint issues in main source files |

**Note:** All 12 files committed atomically because the pre-commit hook runs `golangci-lint run ./...` globally — partial commits would fail while unfixed files remain in the working tree.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Additional files needed for global lint pass**
- **Found during:** Task 1 commit
- **Issue:** The pre-commit hook runs `golangci-lint run ./...` across the entire codebase. The plan listed 8 files, but 4 additional test files (`favorites/config_test.go`, `theme/config_test.go`, `player/volume_test.go`, `queue/persistence_test.go`) also had golines/wsl issues that blocked any commit.
- **Fix:** Fixed all issues in the additional files alongside the planned files.
- **Files modified:** `backend/favorites/config_test.go`, `backend/theme/config_test.go`, `backend/player/volume_test.go`, `backend/queue/persistence_test.go`

**2. [Rule 3 - Blocking] Codegen-check hook failure from pre-existing unstaged changes**
- **Found during:** Task 1 commit
- **Issue:** The `codegen-check` pre-commit hook runs `git diff --name-only` and fails if ANY uncommitted changes exist. Pre-existing frontend TypeScript changes (from previous sessions) caused this check to fail.
- **Fix:** Temporarily stashed the pre-existing frontend changes, committed the lint fixes, then restored the stash. No files were modified or lost.

**3. [Rule 3 - Blocking] Single commit for both tasks**
- **Found during:** Task 1 commit
- **Issue:** The global `golangci-lint run ./...` check in the pre-commit hook means ALL Go files must be lint-clean for ANY commit. Cannot commit source files separately from test files.
- **Fix:** Combined both tasks into a single atomic commit.

## Verification

- `golangci-lint run ./...` → **0 issues**
- `go test ./backend/...` → **all packages pass**
- No behavioral changes to any code

## Self-Check: PASSED

All 12 modified files exist. Commit e1a95e6 verified in git log.