chore: land the remaining low-severity items from the whole-project review

Phase 11 of PROJECT_REVIEW_PLAN.md: the themed cleanup pass over every
low-severity finding still open (2.2-2.3, 3.4-3.6, 4.3-4.7, 6.4-6.7,
7.1-7.3, 8.2-8.3, 9.1-9.4, and the under-documented decisions in §10/§11).

Behavioral fixes:
- Reassign duplicate job IDs in a hand-edited jobs.json instead of letting
  two jobs share one runtime, schedule entry, and SeedStats bucket.
- Disambiguate run-log file names that collide within the same second.
- Compute AvgDurationMS as DurationSumMS/TimedRunCount instead of an
  incremental integer mean, so it always matches the seeded-from-logs
  average instead of drifting from truncation error.
- Clean absolute paths in ResolveConfiguredPath so two spellings of the
  same jobs file do not trigger a spurious adoption.
- Report InstallDesktopIcon failures through ErrorOccurred instead of
  discarding them silently.
- Move settingsView's blocking AutostartStatus (PowerShell on Windows) off
  the UI thread.
- Give notify-timing.tsv its own extension so CleanupLogs no longer
  manages it as a run log.
- Replace the settingsView Save handler's second copy of validateConfig's
  rules with a bare parse, letting the Service's own error surface.

Cleanups:
- Delete collectActivity, the dead yaml tags on RunRecord, and the
  logArguments/LogArguments alias.
- Fold the two systemTrayRegistered/mainWindowHidden globals into one
  trayState instance Run owns and threads through Settings and the
  single-instance reveal path.
- Fix stale comments/docs: the frozen window-size restore claim, a
  reference to a renamed recordRun, README's "Pause all" and notification
  wording, the PowerShell quoting note for TESTS.md's coverage command,
  and scripts/test.bat's UTF-8 checkmarks under a non-UTF-8 code page.
- Document the single-instance fallback's consequence and the
  unauthenticated instance-channel port in STANDARDS.md; record the
  config-shim retirement plan in ROADMAP.md.

3.5, 7.3, and 9.4 turned out to already be fixed by earlier phases; no
change needed for those three.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

README.md

@@ -181,7 +181,7 @@ Named descriptors are also accepted: `@hourly`, `@daily`, `@weekly`,
 3. Set **Schedule**, **Command**, optional **Arguments**, **Folder**, and **Enabled**.
 4. Use **Run now** for a one-off manual run without waiting for the schedule.
 5. Use **Pause** on a single job to suspend it without deleting it.
-6. Use **Pause all** as a global stop switch for all scheduled runs.
+6. Use **Disable auto** as a global stop switch for all scheduled runs.
 7. Open **History** to see past runs, their trigger (`Manual`, `Schedule`, or `UI`), state, and log file.
 8. Open **Settings** to change the storage paths, log cleanup limits, queue behavior, and notifications.
 
@@ -241,8 +241,9 @@ sets one.
 ## Notifications
 
 When **Notify on failure** is enabled in Settings, GoSentry sends a desktop
-notification whenever a scheduled or manual run exits with a non-zero exit code.
-The notification shows the job name and the exit code.
+notification whenever a scheduled or manual run ends in the `Failed` state —
+a non-zero exit code, a timeout, or a process that failed to start.
+The notification shows the job name and the failure detail.
 
 ## Autostart
 

docs/ARCHITECTURE.md

@@ -237,8 +237,9 @@ applies to them — and so measure launch latency only.
 | `RunCount` | total runs recorded |
 | `FailCount` | runs that exited non-zero |
 | `LastDurationMS` | wall-clock time of the most recent run (launch latency for `StartOnly`) |
-| `AvgDurationMS` | mean over all runs with a recorded duration |
+| `AvgDurationMS` | mean over all runs with a recorded duration, computed as `DurationSumMS / TimedRunCount` on every update rather than folded incrementally, so it never disagrees with the exact sum/count average `runner.aggregateLogStats` computes when seeding from logs |
 | `MaxDurationMS` | longest recorded run |
+| `DurationSumMS` | running total of every timed run's duration; the source `AvgDurationMS` is divided from |
 
 `runner.RunJob` measures the wall-clock start→finish and sets `DurationMS` on
 the returned `RunRecord`. `runner/logfile.go` writes a `duration` line into the

docs/ROADMAP.md

@@ -18,15 +18,35 @@ machine):** average **773 ms** per toast (695–874 ms), dominated by PowerShell
 cold start. Re-run the script when comparing after a native toast implementation.
 
 **App-side timing:** each failure notification appends one line to
-`logs/notify-timing.log` (`ms_after_run`, `ms_fyne_do`, `ms_send`,
+`logs/notify-timing.tsv` (`ms_after_run`, `ms_fyne_do`, `ms_send`,
 `ms_app_total`). These columns end when Fyne returns from `SendNotification`; OS
-toast latency is not included.
+toast latency is not included. The `.tsv` extension keeps it out of
+`runner.CleanupLogs`, which only manages `.log` files — this file is
+diagnostic instrumentation for this item, not job output, and should be
+removed (or unified with the run-log retention policy under its own knob) once
+the native-toast direction below lands and the timing data is no longer
+needed.
 
 **Direction:** add `src/platform/notify/` with a native Windows toast (WinRT or
 a maintained Go wrapper), used for failure notifications on Windows. Keep Fyne
 `SendNotification` on Linux (DBus / xdg-desktop-portal) unless profiling shows it
 needs the same treatment.
 
+### Retire the config compatibility shims
+
+Two read-only shims in `storage.loadOrCreateConfig` rewrite an old file into
+the current shape on the next save, so each becomes dead the moment a user's
+config has been saved once by a build that has it:
+
+- `Config.JobsDir` (pre-0.15, superseded by `Config.JobsFile`).
+- `Theme == "default"` (pre-1.0.1, superseded by `ThemeSystem`).
+
+Neither has an expiry. Remove both — the field, the migration branch, and
+`TestLoadOrCreateConfigMigratesJobsDir` /
+`TestLoadOrCreateConfigMigratesLegacyThemeDefault` — once a release has shipped
+long enough that a config file still carrying either old shape is not a
+realistic upgrade path GoSentry needs to support.
+
 ### Dynamic tray icon toggle
 
 Fyne exposes `SetSystemTrayIcon` and related APIs only at application startup.

docs/STANDARDS.md

@@ -121,6 +121,22 @@ change to their shape has to stay compatible on its own.
   an occurrence that fired before the pause/disable. The details pane appends
   ", N queued" to the statistics line via `DisplayStats` whenever the count is
   non-zero.
+- **Single-instance arbitration falls back to "start anyway" when the port is
+  held by something else.** `acquireSingleInstance` (`singleinstance.go`)
+  binds `127.0.0.1:37653`; if that fails and a dial to the same address does
+  not answer as GoSentry either, startup continues rather than refusing to
+  open because of an unrelated local listener. The consequence is deliberate
+  but worth spelling out: two GoSentry processes can then run two schedulers
+  against the same `jobs.json` and the same logs directory, each overwriting
+  the other's saves. Atomic writes (`writeFileAtomic`) prevent a *torn* file
+  from a concurrent write, but not one process's save clobbering the other's.
+- **The single-instance channel is an unauthenticated localhost TCP port.**
+  Port 37653 accepts one command, `"show"`, from any local process — including
+  one running as a different user on a shared machine. This is a deliberate
+  scope choice, not an oversight: the command only raises the existing window,
+  so the impact of an unwelcome sender is a window popping up, not data
+  exposure or control. Anything with a larger blast radius on that channel
+  would need real authentication.
 
 ## Out of scope
 

docs/TESTS.md

@@ -26,6 +26,12 @@ The GUI tests build the Fyne desktop backend, so CGO must be enabled; on Windows
 that means the MSYS2 UCRT64 toolchain described in
 [DEVELOPMENT.md](DEVELOPMENT.md).
 
+`src/ui` dominates `go test -race ./...`'s wall time — around 229s in the
+2026-08-05 whole-project review, against under 8s for every other package
+combined. Budget iteration accordingly: a change confined to `domain`,
+`storage`, `runner`, `scheduler`, or `app` gets a fast feedback loop; a `ui`
+change does not.
+
 ### Manual test commands
 
 Run all tests:
@@ -63,6 +69,15 @@ covered by the `app` tests. Measure the engine packages together instead:
 go test -coverpkg=./src/domain,./src/storage,./src/runner,./src/scheduler,./src/app ./src/domain ./src/storage ./src/runner ./src/scheduler ./src/app
 ```
 
+In the PowerShell environment DEVELOPMENT.md prescribes on Windows, PowerShell
+splits the comma-separated `-coverpkg` list on its own and the command fails
+with `directory not found`. Use the stop-parsing token, or quote the whole
+flag:
+
+```powershell
+go test --% -coverpkg=./src/domain,./src/storage,./src/runner,./src/scheduler,./src/app ./src/domain ./src/storage ./src/runner ./src/scheduler ./src/app
+```
+
 That figure was 84.4% at the 2026-08-04 review, which is the number to compare
 against before concluding that coverage has slipped.
 
@@ -245,6 +260,8 @@ Tests JSON round-tripping, default generation, and backward compatibility.
 | `TestJobsRoundTrip` | Verifies that jobs saved to JSON are reloaded with identical field values. |
 | `TestConfigRoundTrip` | Verifies that settings saved to JSON are reloaded with identical field values. |
 | `TestNormalizeJobsFillsDefaults` | Verifies that `normalizeJobs` assigns sequential IDs and sets default name, schedule, and command for jobs missing those fields. |
+| `TestNormalizeJobsReassignsDuplicateIDs` | Verifies that a hand-edited `jobs.json` with two entries sharing one ID gets the later duplicates reassigned instead of colliding on one runtime. |
+| `TestResolveConfiguredPathCleansAbsolutePaths` | Verifies (Windows only) that forward-slash and backslash spellings of the same absolute path resolve to the same string. |
 | `TestLoadOrCreateConfigCreatesDefaultsOnFirstRun` | Verifies that a missing config file is created with sane defaults. |
 | `TestLoadOrCreateJobsSeedsSampleJobsOnFirstRun` | Verifies that a missing jobs file is created with the sample jobs from `defaultJobs`. |
 | `TestLoadOrCreateConfigKeepsZeroTimeoutOnReload` | Verifies that `default_timeout_seconds: 0` survives a reload rather than being normalized away — 0 is a value, not a missing field. |
@@ -376,6 +393,19 @@ Tests log-file cleanup by age and by count.
 
 ---
 
+### src/runner/logfile_test.go
+
+**Package:** `runner`
+
+Tests the disambiguating suffix `writeRunLog` applies when two runs land on
+the same second.
+
+| Test | Purpose |
+|------|---------|
+| `TestUniqueLogPathAvoidsCollision` | Verifies repeated calls for the same file name return distinct paths instead of silently overwriting an existing log. |
+
+---
+
 ### src/platform/autostart/autostart_windows_test.go
 
 **Location:** `src/platform/autostart/autostart_windows_test.go`
@@ -508,8 +538,6 @@ column-width behaviour of the assembled table.
 
 | Test | Purpose |
 |------|---------|
-| `TestCollectActivityMergesAndSorts` | Verifies per-job logs are merged and sorted by time. |
-| `TestCollectActivitySkipsMissingRuntimes` | Verifies missing runtime entries are skipped safely. |
 | `TestHistoryCellText` | Verifies table cell text for all columns; empty trigger → `Unknown`. |
 | `TestLogFileName` | Verifies log path basename extraction on Windows and Unix paths. |
 | `TestNewEventUsesConsistentTimestampShape` | Verifies UI events use the same timestamp layout as run records. |
@@ -593,7 +621,7 @@ Tests the failure-notification timing diagnostics added in 1.0.2.
 | Test | Purpose |
 |------|---------|
 | `TestNotificationTimingFormatLine` | Verifies `notificationTiming.formatLine` renders the job name and the three millisecond deltas (`ms_after_run`, `ms_fyne_do`, `ms_send`) plus their sum (`ms_app_total`). |
-| `TestAppendNotificationTimingLogWritesHeaderAndRow` | Verifies `appendNotificationTimingLog` creates `notify-timing.log` with its header on first write and appends a row containing the job name. |
+| `TestAppendNotificationTimingLogWritesHeaderAndRow` | Verifies `appendNotificationTimingLog` creates `notify-timing.tsv` with its header on first write and appends a row containing the job name. |
 
 ---
 

scripts/test.bat

@@ -6,6 +6,13 @@ REM Runs go vet and go test with race detection
 REM Move to repository root
 cd /d "%~dp0\.."
 
+REM This file is UTF-8 (the ✓/✗ below). cmd.exe reads batch files in the
+REM console's active code page, which defaults to the system locale (e.g.
+REM CP866 on Russian Windows) rather than UTF-8, so without this the two
+REM symbols render as mojibake. Switching the console to UTF-8 first fixes
+REM that; >nul silences chcp's own "Active code page" confirmation line.
+chcp 65001 >nul
+
 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.

src/app/platform.go

@@ -1,18 +1,25 @@
 package app
 
 import (
+	"fmt"
+
 	"gitea.mixdep.ru/mix/gosentry/src/platform/desktop"
 )
 
 // InstallDesktopIcon installs the application's .desktop file and icon on
 // Linux (no-op on other platforms). The resulting icon path is stored in
-// store.Paths.DesktopIcon so ApplyAutostart can reference it.
+// store.Paths.DesktopIcon so ApplyAutostart can reference it. A failure is
+// reported through ErrorOccurred rather than discarded, so the visible symptom
+// (a generic dock icon) has an explanation in History instead of none.
 func (s *Service) InstallDesktopIcon(appID string, iconBytes []byte) {
-	if iconPath, err := desktop.InstallDesktopIntegration(appID, s.store.Paths.ExecutablePath, iconBytes); err == nil {
-		s.mu.Lock()
-		s.store.Paths.DesktopIcon = iconPath
-		s.mu.Unlock()
+	iconPath, err := desktop.InstallDesktopIntegration(appID, s.store.Paths.ExecutablePath, iconBytes)
+	if err != nil {
+		s.emit(ErrorOccurred{Err: fmt.Errorf("install desktop icon: %w", err)})
+		return
 	}
+	s.mu.Lock()
+	s.store.Paths.DesktopIcon = iconPath
+	s.mu.Unlock()
 }
 
 // AutostartStatus reports whether the platform autostart entry matches the

src/app/run.go

@@ -253,7 +253,8 @@ func updateStats(rt *domain.JobRuntime, r domain.RunRecord) {
 		rt.MaxDurationMS = r.DurationMS
 	}
 	rt.TimedRunCount++
-	rt.AvgDurationMS = (rt.AvgDurationMS*int64(rt.TimedRunCount-1) + r.DurationMS) / int64(rt.TimedRunCount)
+	rt.DurationSumMS += r.DurationMS
+	rt.AvgDurationMS = rt.DurationSumMS / int64(rt.TimedRunCount)
 }
 
 // runningOutput is the placeholder output shown while a job is running, before

src/app/run_test.go

@@ -103,6 +103,15 @@ func TestUpdateStats(t *testing.T) {
 	if rt.AvgDurationMS != 233 {
 		t.Errorf("after run 3: avg=%d, want 233", rt.AvgDurationMS)
 	}
+	// AvgDurationMS must always be exactly DurationSumMS/TimedRunCount — a stored
+	// sum divided once, not an incremental mean that truncates on every step and
+	// compounds error over a long-running job.
+	if rt.DurationSumMS != 700 {
+		t.Errorf("DurationSumMS = %d, want 700", rt.DurationSumMS)
+	}
+	if want := rt.DurationSumMS / int64(rt.TimedRunCount); rt.AvgDurationMS != want {
+		t.Errorf("AvgDurationMS = %d, want DurationSumMS/TimedRunCount = %d", rt.AvgDurationMS, want)
+	}
 }
 
 func TestUpdateStatsSkipsZeroDuration(t *testing.T) {

src/app/service.go

@@ -151,6 +151,7 @@ func (s *Service) applySeededStatsLocked(seeds map[int]runner.SeededStats) {
 		runtime.AvgDurationMS = seed.AvgDurationMS
 		runtime.MaxDurationMS = seed.MaxDurationMS
 		runtime.TimedRunCount = seed.TimedRunCount
+		runtime.DurationSumMS = seed.DurationSumMS
 	}
 }
 

src/domain/record.go

@@ -4,13 +4,13 @@ package domain
 // output is also written to a log file; the in-memory Output copy exists so the
 // latest run can be displayed without reopening the log on every repaint.
 type RunRecord struct {
-	Time       string `yaml:"time"`
-	JobID      int    `yaml:"job_id"`
-	JobName    string `yaml:"job_name"`
-	Trigger    string `yaml:"trigger,omitempty"`
-	State      string `yaml:"state"`
-	Detail     string `yaml:"detail"`
-	LogFile    string `yaml:"log_file,omitempty"`
-	Output     string `yaml:"output,omitempty"`
-	DurationMS int64  `yaml:"duration_ms,omitempty"`
+	Time       string
+	JobID      int
+	JobName    string
+	Trigger    string
+	State      string
+	Detail     string
+	LogFile    string
+	Output     string
+	DurationMS int64
 }

src/domain/runtime.go

@@ -36,6 +36,14 @@ type JobRuntime struct {
 	// launches that round to 0) increment RunCount but not this. StartOnly runs
 	// otherwise contribute their launch latency.
 	TimedRunCount int
+	// DurationSumMS is the running total of every timed run's duration.
+	// AvgDurationMS is always DurationSumMS/TimedRunCount, computed fresh on each
+	// update rather than folded incrementally — an incremental integer mean
+	// truncates on every step, and the error compounds over the life of a job
+	// that keeps running. A stored sum divided once per update matches the exact
+	// sum/count average runner.aggregateLogStats computes when seeding from logs,
+	// so the two no longer disagree about the same run history.
+	DurationSumMS int64
 }
 
 // NewRuntime builds the initial runtime state for a freshly loaded or created

src/runner/invocation.go

@@ -64,5 +64,3 @@ func LogArguments(arguments string) string {
 	}
 	return strings.ReplaceAll(strings.TrimSpace(arguments), "\r\n", "\n")
 }
-
-func logArguments(arguments string) string { return LogArguments(arguments) }

src/runner/logfile.go

@@ -23,9 +23,9 @@ func writeRunLog(logsDir string, job domain.Job, trigger string, state string, d
 	// by run time. The job name is included for human scanning, but sanitized to
 	// avoid characters that are invalid on Windows or awkward on shells.
 	fileName := started.Format("20060102-150405") + "_" + sanitizeFileName(job.Name) + ".log"
-	path := filepath.Join(logsDir, fileName)
+	path := uniqueLogPath(logsDir, fileName)
 	content := fmt.Sprintf("time: %s\njob_id: %d\njob_name: %s\ntrigger: %s\nstate: %s\ndetail: %s\nduration: %d\ncommand: %s\narguments: %s\nstart_only: %t\n\n%s\n",
-		started.Format("2006-01-02 15:04:05"), job.ID, job.Name, trigger, state, detail, durationMS, job.Command, logArguments(job.Arguments), job.StartOnly, output)
+		started.Format("2006-01-02 15:04:05"), job.ID, job.Name, trigger, state, detail, durationMS, job.Command, LogArguments(job.Arguments), job.StartOnly, output)
 	if err := writeFileAtomic(logsDir, path, []byte(content), 0o644); err != nil {
 		return "", fmt.Errorf("write log file: %w", err)
 	}
@@ -70,6 +70,26 @@ func writeFileAtomic(dir, path string, data []byte, perm os.FileMode) error {
 	return nil
 }
 
+// uniqueLogPath returns a path for fileName in dir, appending a disambiguating
+// "-2", "-3", … suffix before the extension if the plain name is already
+// taken. Two runs of the same job in the same second — a fast manual re-run,
+// or a sub-second queue drain — would otherwise share one timestamp and the
+// second write would silently overwrite the first.
+func uniqueLogPath(dir, fileName string) string {
+	path := filepath.Join(dir, fileName)
+	if _, err := os.Stat(path); err != nil {
+		return path
+	}
+	ext := filepath.Ext(fileName)
+	base := strings.TrimSuffix(fileName, ext)
+	for n := 2; ; n++ {
+		candidate := filepath.Join(dir, fmt.Sprintf("%s-%d%s", base, n, ext))
+		if _, err := os.Stat(candidate); err != nil {
+			return candidate
+		}
+	}
+}
+
 func sanitizeFileName(name string) string {
 	name = strings.TrimSpace(name)
 	if name == "" {

src/runner/logfile_test.go

@@ -0,0 +1,36 @@
+package runner
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// TestUniqueLogPathAvoidsCollision pins the fix for two runs of the same job
+// landing on the same second: without disambiguation the second write would
+// silently overwrite the first.
+func TestUniqueLogPathAvoidsCollision(t *testing.T) {
+	dir := t.TempDir()
+	const name = "20260101-120000_job.log"
+
+	first := uniqueLogPath(dir, name)
+	if first != filepath.Join(dir, name) {
+		t.Fatalf("first call: got %q, want the plain name", first)
+	}
+	if err := os.WriteFile(first, []byte("one"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	second := uniqueLogPath(dir, name)
+	if second == first {
+		t.Fatalf("second call returned the same path as an existing file: %q", second)
+	}
+	if err := os.WriteFile(second, []byte("two"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+
+	third := uniqueLogPath(dir, name)
+	if third == first || third == second {
+		t.Fatalf("third call collided with an existing file: %q (existing: %q, %q)", third, first, second)
+	}
+}

src/runner/runner.go

@@ -116,7 +116,7 @@ func startOnlyOutput(job domain.Job, pid int) string {
 	builder.WriteString("command:\n")
 	builder.WriteString(job.Command + "\n\n")
 	builder.WriteString("arguments:\n")
-	builder.WriteString(logArguments(job.Arguments))
+	builder.WriteString(LogArguments(job.Arguments))
 	builder.WriteString("\n\nstart_only:\ntrue")
 	return builder.String()
 }

src/runner/runner_test.go

@@ -135,8 +135,8 @@ func TestLogArguments(t *testing.T) {
 		{"--flag\n--value", "--flag\n--value"},
 	}
 	for _, tc := range cases {
-		if got := logArguments(tc.input); got != tc.want {
-			t.Errorf("logArguments(%q) = %q, want %q", tc.input, got, tc.want)
+		if got := LogArguments(tc.input); got != tc.want {
+			t.Errorf("LogArguments(%q) = %q, want %q", tc.input, got, tc.want)
 		}
 	}
 }

src/runner/seed.go

@@ -21,6 +21,10 @@ type SeededStats struct {
 	AvgDurationMS  int64
 	MaxDurationMS  int64
 	TimedRunCount  int
+	// DurationSumMS is the running total AvgDurationMS was computed from, folded
+	// into JobRuntime.DurationSumMS so app.updateStats continues the same exact
+	// sum instead of restarting from a value it would have to reverse-multiply.
+	DurationSumMS int64
 }
 
 // SeedStats scans logsDir once and reconstructs per-job execution-time
@@ -113,6 +117,7 @@ func aggregateLogStats(files []logSummary) SeededStats {
 	}
 	if durationCount > 0 {
 		stats.TimedRunCount = durationCount
+		stats.DurationSumMS = durationSum
 		stats.AvgDurationMS = durationSum / int64(durationCount)
 	}
 	return stats

src/runner/seed_test.go

@@ -61,6 +61,9 @@ func TestSeedStatsBasic(t *testing.T) {
 	if s.AvgDurationMS != 400 {
 		t.Errorf("AvgDurationMS = %d, want 400", s.AvgDurationMS)
 	}
+	if s.DurationSumMS != 1200 {
+		t.Errorf("DurationSumMS = %d, want 1200", s.DurationSumMS)
+	}
 }
 
 // TestSeedStatsDurationLessLegacyLog verifies that a log without a duration

src/storage/store.go

@@ -19,6 +19,13 @@ type Store struct {
 // PeekKeepRunningInTray reads keep_running_in_tray from gosentry.json for startup
 // decisions that must run before app.Open(). On error it returns the built-in
 // default.
+//
+// Despite the name, this can write: loadOrCreateConfig creates gosentry.json
+// with defaults on first run, the same as OpenStore does moments later when
+// app.Open() parses the now-existing file again. The double parse and the
+// write-on-read are both harmless — the second read just sees the file the
+// first one created — but worth knowing before adding a third startup path
+// that also wants an early look at the config.
 func PeekKeepRunningInTray() bool {
 	paths, err := ResolvePaths()
 	if err != nil {
@@ -207,13 +214,18 @@ func loadOrCreateJobs(path string) ([]domain.Job, error) {
 
 func normalizeJobs(jobs []domain.Job) {
 	next := 1
+	seen := make(map[int]bool, len(jobs))
 	for index := range jobs {
 		job := &jobs[index]
-		if job.ID <= 0 {
-			// IDs are assigned only when absent. Existing IDs stay stable because
-			// History and future log associations use them to identify jobs.
+		if job.ID <= 0 || seen[job.ID] {
+			// IDs are assigned only when absent or already claimed by an earlier job
+			// in this file — a hand-edited jobs.json can carry two entries with the
+			// same ID, which would otherwise share one runtime, one schedule-cache
+			// entry, and one SeedStats bucket. Existing, unique IDs stay stable
+			// because History and future log associations use them to identify jobs.
 			job.ID = next
 		}
+		seen[job.ID] = true
 		if job.ID >= next {
 			next = job.ID + 1
 		}
@@ -241,7 +253,12 @@ func normalizeJobs(jobs []domain.Job) {
 // apply the same rule to a path the user has typed but not yet saved.
 func ResolveConfiguredPath(appDir string, path string) string {
 	if filepath.IsAbs(path) {
-		return path
+		// Cleaned so two spellings of the same file (forward vs. backslashes, a
+		// trailing separator) resolve to the same string. UpdateSettings compares
+		// this against Paths.JobsPath to decide whether the jobs file is changing,
+		// so an uncleaned path here could trigger a spurious adoption against the
+		// file the app is already using.
+		return filepath.Clean(path)
 	}
 	// Relative paths are resolved against the executable directory, not the
 	// process working directory. This matches ResolvePaths and keeps shortcuts,

src/storage/store_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 
@@ -145,6 +146,50 @@ func TestNormalizeJobsFillsDefaults(t *testing.T) {
 	}
 }
 
+// TestNormalizeJobsReassignsDuplicateIDs pins the fix for a hand-edited
+// jobs.json carrying two entries with the same ID: without reassignment both
+// would share one JobRuntime, one schedule-cache entry, and one SeedStats
+// bucket, so editing or deleting either would silently affect both.
+func TestNormalizeJobsReassignsDuplicateIDs(t *testing.T) {
+	jobs := []domain.Job{
+		{ID: 5, Name: "First"},
+		{ID: 5, Name: "Second"},
+		{ID: 5, Name: "Third"},
+	}
+
+	normalizeJobs(jobs)
+
+	seen := make(map[int]bool, len(jobs))
+	for _, job := range jobs {
+		if seen[job.ID] {
+			t.Fatalf("ID %d assigned to more than one job after normalization: %+v", job.ID, jobs)
+		}
+		seen[job.ID] = true
+	}
+	if jobs[0].ID != 5 {
+		t.Errorf("first occurrence should keep its ID: got %d, want 5", jobs[0].ID)
+	}
+	if jobs[1].ID == 5 || jobs[2].ID == 5 {
+		t.Errorf("later duplicates should be reassigned away from 5: got %d, %d", jobs[1].ID, jobs[2].ID)
+	}
+}
+
+// TestResolveConfiguredPathCleansAbsolutePaths pins the fix for two spellings
+// of the same absolute path (forward vs. backslashes) resolving to different
+// strings: UpdateSettings compares this against Paths.JobsPath as strings to
+// decide whether the jobs file is changing, so an uncleaned path here could
+// trigger a spurious adoption against the file already in use.
+func TestResolveConfiguredPathCleansAbsolutePaths(t *testing.T) {
+	if runtime.GOOS != "windows" {
+		t.Skip("backslash vs. forward-slash spellings of the same path are a Windows-only ambiguity")
+	}
+	got := ResolveConfiguredPath(`C:\app`, "C:/data/jobs.json")
+	want := ResolveConfiguredPath(`C:\app`, `C:\data\jobs.json`)
+	if got != want {
+		t.Errorf("forward-slash and backslash spellings resolved differently: %q vs %q", got, want)
+	}
+}
+
 func TestLoadOrCreateConfigCreatesDefaultsOnFirstRun(t *testing.T) {
 	dir := t.TempDir()
 	paths := Paths{

src/ui/history_view.go

@@ -5,8 +5,6 @@ import (
 	"strings"
 	"time"
 
-	"gitea.mixdep.ru/mix/gosentry/src/domain"
-
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/container"
 	"fyne.io/fyne/v2/theme"
@@ -26,22 +24,6 @@ func newEvent(jobID int, jobName string, state string, detail string) event {
 	}
 }
 
-func collectActivity(jobs []job, runtimes map[int]*domain.JobRuntime) []event {
-	var events []event
-	for _, current := range jobs {
-		// At startup this is usually empty because jobs.json does not persist
-		// runtime logs. The function still centralizes the merge for future
-		// history loading from log metadata.
-		if rt := runtimes[current.ID]; rt != nil {
-			events = append(events, rt.Logs...)
-		}
-	}
-	sort.SliceStable(events, func(left int, right int) bool {
-		return events[left].Time < events[right].Time
-	})
-	return events
-}
-
 // textWidth measures how wide s renders at the theme's current body text size.
 func textWidth(s string) float32 {
 	return fyne.MeasureText(s, theme.TextSize(), fyne.TextStyle{}).Width

src/ui/history_view_test.go

@@ -6,8 +6,6 @@ import (
 	"testing"
 	"time"
 
-	"gitea.mixdep.ru/mix/gosentry/src/domain"
-
 	"fyne.io/fyne/v2"
 	"fyne.io/fyne/v2/test"
 	"fyne.io/fyne/v2/widget"
@@ -57,31 +55,6 @@ func TestIndexOfID(t *testing.T) {
 	}
 }
 
-func TestCollectActivityMergesAndSorts(t *testing.T) {
-	jobs := []job{
-		{ID: 1, Name: "A"},
-		{ID: 2, Name: "B"},
-	}
-	runtimes := map[int]*domain.JobRuntime{
-		1: {Logs: []domain.RunRecord{{Time: "2026-01-02 10:00:00", JobID: 1}}},
-		2: {Logs: []domain.RunRecord{{Time: "2026-01-01 09:00:00", JobID: 2}}},
-	}
-	got := collectActivity(jobs, runtimes)
-	if len(got) != 2 {
-		t.Fatalf("len = %d, want 2", len(got))
-	}
-	if got[0].Time != "2026-01-01 09:00:00" || got[1].Time != "2026-01-02 10:00:00" {
-		t.Errorf("sort order = %v, want ascending by Time", got)
-	}
-}
-
-func TestCollectActivitySkipsMissingRuntimes(t *testing.T) {
-	jobs := []job{{ID: 1, Name: "A"}}
-	if got := collectActivity(jobs, nil); len(got) != 0 {
-		t.Errorf("nil runtimes: got %v, want empty", got)
-	}
-}
-
 func TestHistoryCellText(t *testing.T) {
 	events := []event{{
 		Time:    "2026-06-01 12:00:00",

src/ui/jobs_view.go

@@ -85,8 +85,10 @@ func (v *jobsView) refresh() {
 	// it is re-read here rather than mirrored from the tap handler alone — that is
 	// what makes this view a consumer of SchedulerStateChanged.
 	v.applySchedulerState(v.svc.Config().Paused)
+	// updateDetails already ends in a d.logs.Refresh() (both its update and clear
+	// paths do), so refreshing the activity list again here would redraw it twice
+	// per call.
 	v.updateDetails()
-	v.dp.logs.Refresh()
 	v.list.Refresh()
 	v.syncListSelection()
 }

src/ui/jobs_view_helpers.go

@@ -8,7 +8,7 @@ import (
 
 // lastJobLogs returns a fresh slice of the most recent activity entries for the
 // "Selected job activity" panel. Logs are stored newest-first (see
-// app.Service.recordRun), so the leading entries are the latest; the result is
+// app.prependLog), so the leading entries are the latest; the result is
 // capped at maxJobActivityRows.
 func lastJobLogs(logs []event) []event {
 	n := len(logs)

src/ui/mainwindow.go

@@ -21,20 +21,11 @@ const runRecordTimeLayout = "2006-01-02 15:04:05"
 type job = domain.Job
 type event = domain.RunRecord
 
-func newMainView(w fyne.Window, svc *app.Service) (fyne.CanvasObject, func(time.Duration, bool)) {
-	svc.InstallDesktopIcon(appID, assets.IconBytes())
-
-	// Build the initial event history from the current runtime state. Jobs and
-	// runtimes are read here only for this one-time initialization; the jobs view
-	// owns all subsequent state via its own syncFromService closure.
-	initialJobs := svc.Jobs()
-	initialRuntimes := make(map[int]*domain.JobRuntime, len(initialJobs))
-	for _, j := range initialJobs {
-		if rt := svc.Runtime(j.ID); rt != nil {
-			initialRuntimes[j.ID] = rt
-		}
-	}
-	events := newHistoryLog(collectActivity(initialJobs, initialRuntimes))
+func newMainView(w fyne.Window, svc *app.Service, tray *trayState) (fyne.CanvasObject, func(time.Duration, bool)) {
+	// History is session-only: jobs.json never persists JobRuntime.Logs (see
+	// domain.JobRuntime), so there is nothing to seed the History tab with at
+	// startup. It starts empty and fills as events arrive.
+	events := newHistoryLog(nil)
 
 	jobsPanel, refreshJobsView := newJobsView(w, svc)
 
@@ -106,12 +97,15 @@ func newMainView(w fyne.Window, svc *app.Service) (fyne.CanvasObject, func(time.
 			refresh()
 		})
 	}))
+	// Installed after Subscribe so a failure reaches History through
+	// ErrorOccurred instead of being emitted to no listener.
+	svc.InstallDesktopIcon(appID, assets.IconBytes())
 	svc.Start()
 
 	tabs := container.NewAppTabs(
 		container.NewTabItemWithIcon("Jobs", theme.ListIcon(), jobsPanel),
 		container.NewTabItemWithIcon("History", theme.HistoryIcon(), history),
-		container.NewTabItemWithIcon("Settings", theme.SettingsIcon(), settingsView(w, svc)),
+		container.NewTabItemWithIcon("Settings", theme.SettingsIcon(), settingsView(w, svc, tray)),
 	)
 	tabs.SetTabLocation(container.TabLocationTop)
 

src/ui/mainwindow_test.go

@@ -66,7 +66,7 @@ func TestMainViewFitsTheDefaultWindowSize(t *testing.T) {
 	svc := app.NewService(store, nil)
 	defer svc.Stop()
 
-	content, _ := newMainView(w, svc)
+	content, _ := newMainView(w, svc, &trayState{})
 	min := content.MinSize()
 	if min.Width > defaultWindowWidth || min.Height > defaultWindowHeight {
 		t.Errorf("content.MinSize() = %v, want within %vx%v", min, defaultWindowWidth, defaultWindowHeight)
@@ -111,7 +111,7 @@ func TestMainViewRecordStartupAddsHistoryRow(t *testing.T) {
 	svc := newTestService(t)
 	defer svc.Stop()
 
-	content, recordStartup := newMainView(w, svc)
+	content, recordStartup := newMainView(w, svc, &trayState{})
 	w.SetContent(content)
 
 	table := historyTable(t, content)

src/ui/notify_timing.go

@@ -7,7 +7,10 @@ import (
 	"time"
 )
 
-const notificationTimingLogName = "notify-timing.log"
+// notificationTimingLogName deliberately does not end in .log: runner.CleanupLogs
+// only manages .log files in the logs directory, and this diagnostic file
+// should not be subject to (or counted against) that retention policy.
+const notificationTimingLogName = "notify-timing.tsv"
 
 // notificationTiming captures wall-clock points from a failed run through
 // SendNotification. It does not include OS toast display latency — Fyne on

src/ui/run.go

@@ -17,9 +17,10 @@ import (
 const appID = "ru.mixeme.gosentry.desktop"
 
 // defaultWindowWidth and defaultWindowHeight are the size the window opens at
-// on first launch (later launches restore the last size from preferences).
-// Fyne enforces the assembled content's MinSize as a hard floor over these, so
-// they only take effect if the content actually fits within them.
+// on every launch. Window size persistence is frozen (see ROADMAP.md), so
+// there is no saved size to restore. Fyne enforces the assembled content's
+// MinSize as a hard floor over these, so they only take effect if the content
+// actually fits within them.
 const defaultWindowWidth = 1024
 const defaultWindowHeight = 660
 
@@ -60,10 +61,7 @@ func Run(startInTray bool) {
 
 	w := a.NewWindow("GoSentry " + app.Version)
 	setWindowsNotificationIcon()
-	prefs := a.Preferences()
-	winW := float32(prefs.FloatWithFallback("window.width", defaultWindowWidth))
-	winH := float32(prefs.FloatWithFallback("window.height", defaultWindowHeight))
-	w.Resize(fyne.NewSize(winW, winH))
+	w.Resize(fyne.NewSize(defaultWindowWidth, defaultWindowHeight))
 	svc, err := app.Open()
 	if err != nil {
 		w.SetContent(container.NewPadded(widget.NewLabel("Failed to load GoSentry configuration: " + err.Error())))
@@ -73,13 +71,14 @@ func Run(startInTray bool) {
 	config := svc.Config()
 	keepInTray = config.KeepRunningInTray
 	startHidden = resolveStartHidden(startInTray, keepInTray)
-	applyTrayBehavior(a, w, keepInTray, false)
+	tray := &trayState{}
+	tray.apply(a, w, keepInTray, false)
 	// Apply the persisted theme before building content so the window renders in
 	// the chosen theme from the first frame rather than flashing the default one.
 	applyTheme(a, config.Theme)
-	content, recordStartup := newMainView(w, svc)
+	content, recordStartup := newMainView(w, svc, tray)
 	w.SetContent(content)
-	serveSingleInstance(instanceListener, w)
+	serveSingleInstance(instanceListener, w, tray)
 	if startHidden {
 		// Autostart launches intentionally stay hidden, so "window shown" would be
 		// a misleading metric. Record a separate startup event for the tray path

src/ui/settings_view.go

@@ -26,7 +26,7 @@ var settingsCaptions = []string{
 	"GoSentry", "Go", "Fyne", "Repository",
 }
 
-func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
+func settingsView(w fyne.Window, svc *app.Service, tray *trayState) fyne.CanvasObject {
 	// saved mirrors the config as last persisted (or freshly loaded at
 	// construction); it is a local copy the closures below compare the form
 	// against and reassign after a successful save, rather than holding onto
@@ -49,17 +49,36 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 	autostartStatus := widget.NewLabel("")
 	trayRestartHint := widget.NewLabel("")
 	trayRestartHint.Truncation = fyne.TextTruncateClip
+	// autostartCheckGen guards against an in-flight check's result landing after
+	// a newer one started (e.g. the user toggles a checkbox again before the
+	// first check's PowerShell call returns). Both the increment and the compare
+	// happen on the main/Fyne thread, so this needs no lock of its own.
+	var autostartCheckGen int
 	refreshAutostartStatus := func() {
 		if settingsPendingAutostart(startOnLogin, minimizeToTray, saved) {
 			autostartStatus.SetText("Pending: save settings to apply")
 			return
 		}
-		ok, message := svc.AutostartStatus()
-		if ok {
-			autostartStatus.SetText("OK: " + message)
-			return
-		}
-		autostartStatus.SetText("Problem: " + message)
+		// svc.AutostartStatus() reaches readShortcut on Windows, which spawns
+		// powershell.exe and blocks on CombinedOutput() — hundreds of milliseconds
+		// of cold start. Running it off the main thread keeps that from freezing
+		// the window on construction and on every checkbox toggle.
+		autostartStatus.SetText("Checking...")
+		autostartCheckGen++
+		gen := autostartCheckGen
+		go func() {
+			ok, message := svc.AutostartStatus()
+			fyne.Do(func() {
+				if gen != autostartCheckGen {
+					return
+				}
+				if ok {
+					autostartStatus.SetText("OK: " + message)
+					return
+				}
+				autostartStatus.SetText("Problem: " + message)
+			})
+		}()
 	}
 	refreshTrayRestartHint := func(pending bool) {
 		if pending {
@@ -142,27 +161,16 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 	settingsStatus := widget.NewLabel("")
 
 	saveSettings := widget.NewButtonWithIcon("Save settings", theme.DocumentSaveIcon(), func() {
-		files, err := strconv.Atoi(strings.TrimSpace(maxLogFiles.Text))
-		if err != nil || files < 0 {
-			settingsStatus.SetText("Max log files must be zero (unlimited) or a positive number")
-			return
-		}
-		days, err := strconv.Atoi(strings.TrimSpace(maxLogAgeDays.Text))
-		if err != nil || days < 0 {
-			settingsStatus.SetText("Max log age days must be zero (unlimited) or a positive number")
-			return
-		}
-		if strings.TrimSpace(jobsFile.Text) == "" {
-			settingsStatus.SetText("Jobs file is required")
-			return
-		}
-		if strings.TrimSpace(logsDir.Text) == "" {
-			settingsStatus.SetText("Logs directory is required")
-			return
-		}
-		timeout, err := strconv.Atoi(strings.TrimSpace(defaultTimeout.Text))
-		if err != nil || timeout < 0 {
-			settingsStatus.SetText("Default timeout must not be negative (0 = no timeout)")
+		// Only the parse itself happens here: a numeric field has to become an int
+		// before it can go into a domain.Config at all. Everything else — required
+		// fields, negative numbers, valid enum values — is Service.UpdateSettings'
+		// job (see app.validateConfig), so its error is what the user sees rather
+		// than a second copy of the same rules with different wording.
+		files, filesErr := strconv.Atoi(strings.TrimSpace(maxLogFiles.Text))
+		days, daysErr := strconv.Atoi(strings.TrimSpace(maxLogAgeDays.Text))
+		timeout, timeoutErr := strconv.Atoi(strings.TrimSpace(defaultTimeout.Text))
+		if filesErr != nil || daysErr != nil || timeoutErr != nil {
+			settingsStatus.SetText("Max log files, max log age days, and default timeout must be numbers")
 			return
 		}
 		// Build the new config from the form and hand it to the Service, which
@@ -196,7 +204,7 @@ func settingsView(w fyne.Window, svc *app.Service) fyne.CanvasObject {
 			return
 		}
 		refreshAutostartStatus()
-		applyTrayBehavior(fyne.CurrentApp(), w, config.KeepRunningInTray, true)
+		tray.apply(fyne.CurrentApp(), w, config.KeepRunningInTray, true)
 		if previousKeepInTray != config.KeepRunningInTray {
 			trayRestartHint.SetText(trayRestartHintText)
 		} else {

src/ui/singleinstance.go

@@ -34,11 +34,14 @@ func acquireSingleInstance(showExisting bool) (net.Listener, bool) {
 	// If the port is unavailable but does not answer as GoSentry, continue
 	// startup instead of making the application impossible to open because of an
 	// unrelated local listener. In the normal duplicate-start case the dial above
-	// succeeds and this process exits after waking the first instance.
+	// succeeds and this process exits after waking the first instance. The
+	// consequence of this fallback — two schedulers able to run against the same
+	// jobs.json and logs directory — is recorded in STANDARDS.md alongside the
+	// unauthenticated nature of this same port.
 	return nil, true
 }
 
-func serveSingleInstance(listener net.Listener, w fyne.Window) {
+func serveSingleInstance(listener net.Listener, w fyne.Window, tray *trayState) {
 	if listener == nil {
 		return
 	}
@@ -56,7 +59,7 @@ func serveSingleInstance(listener net.Listener, w fyne.Window) {
 			// Accept runs on its own goroutine, so focusing the window must be
 			// marshaled onto the main thread like every other widget update.
 			fyne.Do(func() {
-				mainWindowHidden = false
+				tray.hidden = false
 				w.Show()
 				w.RequestFocus()
 			})

src/ui/tray.go

@@ -10,16 +10,19 @@ import (
 	fynedesktop "fyne.io/fyne/v2/driver/desktop"
 )
 
-// systemTrayRegistered tracks whether this process registered a tray icon at
-// launch. Fyne cannot add or remove the icon mid-session, so toggling
-// KeepRunningInTray in Settings updates close behavior immediately and shows a
-// restart hint for the icon itself.
-var systemTrayRegistered bool
-
-// mainWindowHidden tracks whether the primary window was hidden via the tray
-// close intercept. Fyne exposes no Window.Visible API, so the flag drives the
-// reveal-on-tray-disable path in applyTrayBehavior.
-var mainWindowHidden bool
+// trayState tracks the two pieces of tray-related process state that Fyne
+// itself does not expose: whether this process has registered the tray icon
+// (Fyne cannot add or remove it mid-session, so toggling KeepRunningInTray in
+// Settings updates close behavior immediately but shows a restart hint for the
+// icon itself) and whether the primary window is currently hidden via the tray
+// close intercept (Fyne exposes no Window.Visible API). Run owns one instance
+// and passes it to every call site of apply — settingsView's Save handler is
+// the other one — so the coupling between them is explicit instead of hidden
+// behind package-level globals that no test can reset.
+type trayState struct {
+	registered bool
+	hidden     bool
+}
 
 const trayRestartHintText = "Restart GoSentry for the tray icon change to take effect."
 
@@ -27,23 +30,23 @@ func resolveStartHidden(cliStartInTray, keepInTray bool) bool {
 	return domain.ResolveStartHidden(cliStartInTray, keepInTray)
 }
 
-// applyTrayBehavior configures window close handling for KeepRunningInTray.
-// When revealIfHidden is true and the tray is off, a hidden window is shown so
-// the user can still reach the app after disabling the tray mid-session.
-func applyTrayBehavior(a fyne.App, w fyne.Window, keepInTray bool, revealIfHidden bool) {
-	if keepInTray && !systemTrayRegistered {
-		registerSystemTray(a, w)
-		systemTrayRegistered = true
+// apply configures window close handling for KeepRunningInTray. When
+// revealIfHidden is true and the tray is off, a hidden window is shown so the
+// user can still reach the app after disabling the tray mid-session.
+func (t *trayState) apply(a fyne.App, w fyne.Window, keepInTray bool, revealIfHidden bool) {
+	if keepInTray && !t.registered {
+		t.registerSystemTray(a, w)
+		t.registered = true
 	}
-	setWindowCloseBehavior(w, keepInTray)
-	if !keepInTray && revealIfHidden && mainWindowHidden {
-		mainWindowHidden = false
+	t.setWindowCloseBehavior(w, keepInTray)
+	if !keepInTray && revealIfHidden && t.hidden {
+		t.hidden = false
 		w.Show()
 		w.RequestFocus()
 	}
 }
 
-func registerSystemTray(a fyne.App, w fyne.Window) {
+func (t *trayState) registerSystemTray(a fyne.App, w fyne.Window) {
 	desk, ok := a.(fynedesktop.App)
 	if !ok {
 		// Not every Fyne driver exposes desktop tray features. Returning silently
@@ -74,7 +77,7 @@ func registerSystemTray(a fyne.App, w fyne.Window) {
 	quit.IsQuit = true
 	menu := fyne.NewMenu("GoSentry",
 		fyne.NewMenuItem("Show", func() {
-			mainWindowHidden = false
+			t.hidden = false
 			w.Show()
 			w.RequestFocus()
 		}),
@@ -85,17 +88,17 @@ func registerSystemTray(a fyne.App, w fyne.Window) {
 	desk.SetSystemTrayWindow(w)
 }
 
-func setWindowCloseBehavior(w fyne.Window, keepInTray bool) {
+func (t *trayState) setWindowCloseBehavior(w fyne.Window, keepInTray bool) {
 	if keepInTray {
 		w.SetCloseIntercept(func() {
 			// Closing hides the window instead of quitting because scheduler tools are
 			// expected to keep working in the background. The explicit Quit tray item
 			// remains the way to stop the process.
-			mainWindowHidden = true
+			t.hidden = true
 			w.Hide()
 		})
 		return
 	}
-	mainWindowHidden = false
+	t.hidden = false
 	w.SetCloseIntercept(nil)
 }