Refactoring complete: v0.4.0 architectural milestone (#1)

## Summary

Completed Phase 5 refactoring and reached the target architecture.

**Architectural milestone achieved:**
- Service layer owns all state and is the sole writer
- UI is a thin Fyne view, all widget updates marshaled via `fyne.Do`
- Core engines are stateless and injectable
- Domain types are pure (no `yaml:"-"` fields)
- Full module builds and `go vet ./...` clean

## Changes

- Bump version: 0.3.6 → 0.4.0
- Update CHANGELOG with Phase 5 summary
- Add ROADMAP "Refactoring Follow-Ups" section

## Known follow-up work

1. **Linux test build broken** — `runner_test.go` needs `//go:build windows` tag
2. **File-size limits exceeded** — `operations.go` (486 lines), `jobs_view.go` (415 lines)

See ROADMAP.md for details.

---------

Co-authored-by: mixeme <mix.public@ya.ru>
Reviewed-on: #1

scripts/build-linux-docker.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 # Optional first argument mirrors build-linux.sh. The Docker build still writes
 # the final artifact into the local dist/ tree, not into the container. The
 # default includes the application version and target platform.
-version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/core/version.go)"
+version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/app/version.go)"
 version="${version:-0.0.0-dev}"
 tag="gitea.mixdep.ru/mix/gosentry-builder:${version}"
 output="${1:-dist/linux/gosentry-${version}-linux-amd64}"
@@ -26,7 +26,7 @@ docker run --rm \
     -v "$(pwd):/src" \
     -w /src \
     "$tag" \
-    bash -c 'CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/core.Version=${VERSION}" -o "${OUTPUT}" ./cmd/gosentry'
+    bash -c 'CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/app.Version=${VERSION}" -o "${OUTPUT}" ./cmd/gosentry'
 
 # Icons are embedded in the Go binary, so there is no assets directory to copy
 # after extracting the Linux executable.

scripts/build-linux.sh

@@ -3,7 +3,7 @@ set -euo pipefail
 
 # Optional first argument lets a developer or CI job choose the output path. The
 # default includes the application version and target platform.
-version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/core/version.go)"
+version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/app/version.go)"
 version="${version:-0.0.0-dev}"
 output="${1:-dist/linux/gosentry-${version}-linux-amd64}"
 mkdir -p "$(dirname "$output")"
@@ -17,7 +17,7 @@ export GOARCH=amd64
 
 # -trimpath removes local machine paths from debug/build metadata. -s -w strips
 # symbol/debug tables to keep the desktop binary smaller.
-go build -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/core.Version=${version}" -o "$output" ./cmd/gosentry
+go build -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/app.Version=${version}" -o "$output" ./cmd/gosentry
 
 # The application icon is embedded by Go, so the Linux build does not need a
 # sidecar assets directory beside the executable.

scripts/build-release-linux.sh

@@ -9,7 +9,7 @@ script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 repo_root="$(cd "${script_dir}/.." && pwd)"
 cd "$repo_root"
 
-version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/core/version.go)"
+version="$(sed -n 's/^var Version = "\(.*\)"/\1/p' src/app/version.go)"
 version="${version:-0.0.0-dev}"
 tag="gitea.mixdep.ru/mix/gosentry-builder:${version}"
 
@@ -99,15 +99,15 @@ run_in_builder() {
 }
 
 build_linux_amd64() {
-    run_in_builder 'mkdir -p dist/linux && CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/core.Version=${VERSION}" -o "dist/linux/gosentry-${VERSION}-linux-amd64" ./cmd/gosentry'
+    run_in_builder 'mkdir -p dist/linux && CGO_ENABLED=1 GOOS=linux GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/app.Version=${VERSION}" -o "dist/linux/gosentry-${VERSION}-linux-amd64" ./cmd/gosentry'
 }
 
 build_linux_arm64() {
-    run_in_builder 'mkdir -p dist/linux && CC=aarch64-linux-gnu-gcc CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CGO_CFLAGS="--sysroot=/ -I/usr/include/aarch64-linux-gnu" CGO_LDFLAGS="--sysroot=/ -L/usr/lib/aarch64-linux-gnu" PKG_CONFIG_LIBDIR=/usr/lib/aarch64-linux-gnu/pkgconfig go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/core.Version=${VERSION}" -o "dist/linux/gosentry-${VERSION}-linux-arm64" ./cmd/gosentry'
+    run_in_builder 'mkdir -p dist/linux && CC=aarch64-linux-gnu-gcc CGO_ENABLED=1 GOOS=linux GOARCH=arm64 CGO_CFLAGS="--sysroot=/ -I/usr/include/aarch64-linux-gnu" CGO_LDFLAGS="--sysroot=/ -L/usr/lib/aarch64-linux-gnu" PKG_CONFIG_LIBDIR=/usr/lib/aarch64-linux-gnu/pkgconfig go build -buildvcs=false -trimpath -ldflags "-s -w -X gitea.mixdep.ru/mix/gosentry/src/app.Version=${VERSION}" -o "dist/linux/gosentry-${VERSION}-linux-arm64" ./cmd/gosentry'
 }
 
 build_windows_amd64() {
-    run_in_builder 'mkdir -p dist/windows && x86_64-w64-mingw32-windres -O coff -o cmd/gosentry/rsrc_windows_amd64.syso packaging/windows/gosentry.rc && CC=x86_64-w64-mingw32-gcc CGO_ENABLED=1 GOOS=windows GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -H=windowsgui -X gitea.mixdep.ru/mix/gosentry/src/core.Version=${VERSION}" -o "dist/windows/gosentry-${VERSION}-windows-amd64.exe" ./cmd/gosentry'
+    run_in_builder 'mkdir -p dist/windows && x86_64-w64-mingw32-windres -O coff -o cmd/gosentry/rsrc_windows_amd64.syso packaging/windows/gosentry.rc && CC=x86_64-w64-mingw32-gcc CGO_ENABLED=1 GOOS=windows GOARCH=amd64 go build -buildvcs=false -trimpath -ldflags "-s -w -H=windowsgui -X gitea.mixdep.ru/mix/gosentry/src/app.Version=${VERSION}" -o "dist/windows/gosentry-${VERSION}-windows-amd64.exe" ./cmd/gosentry'
 }
 
 mapfile -t targets < <(choose_targets "$@" | normalize_targets | awk '!seen[$0]++')

scripts/build-windows.bat

@@ -6,7 +6,7 @@ REM directory. Move to the repository root (the parent of scripts\) before using
 REM relative paths such as .\cmd\gosentry and packaging\windows\gosentry.rc.
 cd /d "%~dp0\.."
 
-for /f "tokens=4" %%V in ('findstr /C:"var Version" src\core\version.go') do set "VERSION=%%~V"
+for /f "tokens=4" %%V in ('findstr /C:"var Version" src\app\version.go') do set "VERSION=%%~V"
 if "%VERSION%"=="" set "VERSION=0.0.0-dev"
 set "VERSION=%VERSION:"=%"
 
@@ -47,7 +47,7 @@ if %ERRORLEVEL%==0 (
 REM -trimpath removes local machine paths from the binary, -s -w reduce binary
 REM size, and -H=windowsgui prevents a separate console window from opening when
 REM the GUI app starts from Explorer or a shortcut.
-"%GOEXE%" build -trimpath -ldflags "-s -w -H=windowsgui -X gitea.mixdep.ru/mix/gosentry/src/core.Version=%VERSION%" -o "%OUTPUT%" .\cmd\gosentry
+"%GOEXE%" build -trimpath -ldflags "-s -w -H=windowsgui -X gitea.mixdep.ru/mix/gosentry/src/app.Version=%VERSION%" -o "%OUTPUT%" .\cmd\gosentry
 if errorlevel 1 exit /b 1
 
 REM Icons are embedded into the executable, so no assets directory is copied next

scripts/test.bat

@@ -0,0 +1,35 @@
+@echo off
+setlocal enabledelayedexpansion
+REM GoSentry test runner
+REM Runs go vet and go test with race detection
+
+REM Move to repository root
+cd /d "%~dp0\.."
+
+REM Fyne uses native libraries through CGO. MSYS2 UCRT64 provides the GCC toolchain
+REM expected by the Windows build; prepending it keeps the script self-contained
+REM without permanently changing the user's system PATH.
+if exist "C:\msys64\ucrt64\bin" set "PATH=C:\msys64\ucrt64\bin;%PATH%"
+
+REM Race detector requires CGO
+set "CGO_ENABLED=1"
+
+echo Running go vet...
+go vet ./...
+if errorlevel 1 (
+    echo.
+    echo ✗ go vet failed
+    exit /b 1
+)
+
+echo.
+echo Running go test with race detection...
+go test -race ./...
+if errorlevel 1 (
+    echo.
+    echo ✗ go test failed
+    exit /b 1
+)
+
+echo.
+echo ✓ All tests passed

scripts/test.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# GoSentry test runner
+# Runs go vet and go test with race detection
+
+set -e
+
+echo "Running go vet..."
+go vet ./...
+
+echo ""
+echo "Running go test with race detection..."
+go test -race ./...
+
+echo ""
+echo "✓ All tests passed"