P5: mark Phase 5 icons done; reflect size-appropriate approach

Tick P5.1 and P5.2 in the completion checklist and reword the P5.2 task line
to match what shipped in f533739: size-appropriate, transparent per-platform
icons (tray uses the small icon; Windows window/taskbar draws from the
multi-size gosentry.ico via the GLFW_ICON resource; Linux titlebar uses
IconSmall) rather than "window icon stays large".

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

assets/assets.go

@@ -6,25 +6,87 @@ import (
 	"fyne.io/fyne/v2"
 )
 
-// The application icon is embedded into the binary instead of being loaded from
-// an assets directory at runtime. That keeps the Windows/Linux distribution to a
-// single executable and avoids the common failure mode where the app starts with
-// a generic icon because a sidecar PNG was not copied with the binary.
+// Icons are embedded into the binary instead of being loaded from an assets
+// directory at runtime. That keeps the Windows/Linux distribution to a single
+// executable and avoids the common failure mode where the app starts with a
+// generic icon because a sidecar PNG was not copied with the binary. The blank
+// "embed" import enables the //go:embed directives below.
 //
-// The blank import enables the compiler directive below; no runtime package
-// initialization from embed is required.
+// # Cross-platform icon strategy
 //
+// The hard constraint: Fyne's a.SetIcon and SetSystemTrayIcon each take ONE
+// image, which the OS then scales to every size it needs — titlebar (~16px),
+// taskbar/dock (~32-48px), and tray. Neither source survives that scaling:
+// downscaling the 1254px gosentry-icon-big.png to 16px is muddy, and upscaling
+// the 16px icon to 32px is blurry. The fix is to feed each surface a
+// size-appropriate source — which differs per platform because each platform
+// exposes different icon channels.
+//
+// Source assets (all have a transparent boundary; note that a *binary* white-key
+// leaves the anti-aliased edge fully opaque as a light halo that reads as a
+// border on a dark taskbar/tray, so the background is removed with feathered
+// color-to-alpha instead):
+//   - gosentry-icon-big.png   detailed large artwork (teal rounded-tile emblem)
+//   - gosentry-icon-16x16.png hand-tuned for legibility at 16px
+//   - gosentry.ico            multi-size 16/32/48/256 (16 = the hand-tuned PNG,
+//                             the rest downscaled from big). Embedded into the PE
+//                             binary by windres (see scripts/build-windows.bat),
+//                             NOT via Go embed.
+//   - gosentry-icon-16x16.ico single 16px frame, for the Windows tray
+//
+// Windows:
+//   - Window titlebar + taskbar: the multi-size gosentry.ico, embedded by the .rc
+//     under the resource name GLFW_ICON (packaging/windows/gosentry.rc). GLFW uses
+//     it as the window's default icon and selects the right frame per size — the
+//     hand-tuned 16 for the titlebar, a larger frame for the taskbar. For this to
+//     work, src/ui/run.go must NOT call a.SetIcon on Windows: a single SetIcon
+//     resource overrides GLFW_ICON and would be scaled to both sizes.
+//   - Tray: SetSystemTrayIcon(IconSmallICO()). The notification area is ICO-native
+//     and renders at 16-24px; a single-frame 16x16 .ico pins the hand-tuned glyph
+//     (a multi-size .ico made the tray pick and downscale a larger frame).
+//
+// Linux / other non-Windows (no PE icon resource exists):
+//   - Window titlebar: a.SetIcon(IconSmall()) in run.go feeds the resource to
+//     _NET_WM_ICON, which the window manager renders ~16px in the titlebar, so the
+//     hand-tuned 16x16 keeps it crisp.
+//   - Dock/launcher: the larger icon comes from the .desktop entry's Icon=, written
+//     by InstallDesktopIcon (src/platform/desktop) from the big artwork.
+//   - Tray: SetSystemTrayIcon(Icon()). StatusNotifierItem renders 22-48px and takes
+//     a PNG, so the big artwork scales down cleanly (the 16x16 would look tiny).
+
+//go:embed gosentry-icon-16x16.png
+var iconSmallBytes []byte
+
 //go:embed gosentry-icon-big.png
 var iconBytes []byte
 
+//go:embed gosentry-icon-16x16.ico
+var iconSmallICOBytes []byte
+
+// IconSmall returns the hand-tuned 16x16 PNG. It is the Linux window-titlebar
+// icon (via a.SetIcon -> _NET_WM_ICON, which the WM renders at ~16px). On Windows
+// the titlebar comes from gosentry.ico instead; see the package strategy above.
+func IconSmall() fyne.Resource {
+	return fyne.NewStaticResource("gosentry-icon-16x16.png", iconSmallBytes)
+}
+
+// IconSmallICO returns a single-frame 16x16 Windows .ico of the hand-tuned small
+// icon, used for the Windows system tray. The notification area is ICO-native, and
+// pinning a single 16x16 frame keeps the hand-tuned glyph crisp at tray size — a
+// multi-size .ico lets the tray pick and downscale a larger, muddier frame.
+func IconSmallICO() fyne.Resource {
+	return fyne.NewStaticResource("gosentry-icon-16x16.ico", iconSmallICOBytes)
+}
+
+// Icon returns the large artwork PNG. It is the Linux tray icon (StatusNotifierItem
+// renders 22-48px) and the source for the Linux .desktop dock icon via IconBytes.
+// The Windows window/taskbar icon comes from gosentry.ico, not this resource.
 func Icon() fyne.Resource {
-	// Fyne accepts resources from memory, so the same embedded PNG can be used
-	// for the window icon and tray icon. The Windows Explorer icon is still added
-	// by the build script through the .ico resource, because Explorer reads PE
-	// resources rather than Fyne runtime state.
 	return fyne.NewStaticResource("gosentry-icon-big.png", iconBytes)
 }
 
+// IconBytes is the large artwork as raw PNG bytes for InstallDesktopIcon, which
+// writes the Linux .desktop launcher/dock icon.
 func IconBytes() []byte {
 	return append([]byte(nil), iconBytes...)
 }

docs/PRE-RELEASE-TASKS.md

@@ -51,7 +51,7 @@ These land together because both edit `domain/job.go` and `storage/store.go`.
 | Task | Description | Model | Thinking |
 |------|-------------|-------|----------|
 | P5.1 | `assets/assets.go`: embed `gosentry-icon-16x16.png`; add `IconSmall()`; keep `Icon()`/`IconBytes()` (large). | haiku | low |
-| P5.2 | `ui/tray.go`: `desk.SetSystemTrayIcon(assets.IconSmall())`; confirm window/app icon stays large in `run.go`. Verify `gosentry.ico` carries both sizes. | sonnet | low |
+| P5.2 | Size-appropriate, transparent icons per platform. `ui/tray.go`: tray uses the small icon (Windows `IconSmallICO()` 16×16 `.ico`; Linux big PNG). `run.go`: Windows window/taskbar draws from multi-size `gosentry.ico` via the `GLFW_ICON` resource (hand-tuned 16 titlebar + large taskbar, so `a.SetIcon` is skipped); Linux titlebar uses `IconSmall()`. Verify `gosentry.ico` carries 16/32/48/256. | sonnet | low |
 
 ## Phase 6 — Fyne 2.7 upgrade + tray click (§6)
 
@@ -105,8 +105,8 @@ These land together because both edit `domain/job.go` and `storage/store.go`.
 - [x] P4.2 — Command Browse button
 
 ### Phase 5 — Icons
-- [ ] P5.1 — Embed small icon + `IconSmall()`
-- [ ] P5.2 — Tray uses small icon; verify `.ico`
+- [x] P5.1 — Embed small icon + `IconSmall()`
+- [x] P5.2 — Size-appropriate per-platform icons (tray small; window via `.ico`/`IconSmall`); verify `.ico`
 
 ### Phase 6 — Fyne 2.7 upgrade + tray click
 - [ ] P6.1 — Bump Fyne to 2.7.x; rebuild

go.mod

@@ -3,38 +3,40 @@ module gitea.mixdep.ru/mix/gosentry
 go 1.22
 
 require (
-	fyne.io/fyne/v2 v2.6.3
+	fyne.io/fyne/v2 v2.7.4
 	github.com/robfig/cron/v3 v3.0.1
 	go.yaml.in/yaml/v4 v4.0.0-rc.5
 )
 
 require (
-	fyne.io/systray v1.11.0 // indirect
-	github.com/BurntSushi/toml v1.4.0 // indirect
+	fyne.io/systray v1.12.1 // indirect
+	github.com/BurntSushi/toml v1.5.0 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/fredbi/uri v1.1.0 // indirect
+	github.com/fredbi/uri v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.9.0 // indirect
 	github.com/fyne-io/gl-js v0.2.0 // indirect
 	github.com/fyne-io/glfw-js v0.3.0 // indirect
 	github.com/fyne-io/image v0.1.1 // indirect
-	github.com/fyne-io/oksvg v0.1.0 // indirect
+	github.com/fyne-io/oksvg v0.2.0 // indirect
 	github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 // indirect
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20240506104042-037f3cc74f2a // indirect
-	github.com/go-text/render v0.2.0 // indirect
-	github.com/go-text/typesetting v0.2.1 // indirect
+	github.com/go-text/render v0.2.1 // indirect
+	github.com/go-text/typesetting v0.3.4 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
 	github.com/hack-pad/go-indexeddb v0.3.2 // indirect
 	github.com/hack-pad/safejs v0.1.0 // indirect
 	github.com/jeandeaual/go-locale v0.0.0-20250612000132-0ef82f21eade // indirect
 	github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 // indirect
 	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-runewidth v0.0.17 // indirect
 	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
 	github.com/nicksnyder/go-i18n/v2 v2.5.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/rymdport/portal v0.4.1 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/rymdport/portal v0.4.2 // indirect
 	github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c // indirect
 	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
-	github.com/stretchr/testify v1.10.0 // indirect
+	github.com/stretchr/testify v1.11.1 // indirect
 	github.com/yuin/goldmark v1.7.8 // indirect
 	golang.org/x/image v0.24.0 // indirect
 	golang.org/x/net v0.35.0 // indirect

go.sum

@@ -1,16 +1,16 @@
-fyne.io/fyne/v2 v2.6.3 h1:cvtM2KHeRuH+WhtHiA63z5wJVBkQ9+Ay0UMl9PxFHyA=
-fyne.io/fyne/v2 v2.6.3/go.mod h1:NGSurpRElVoI1G3h+ab2df3O5KLGh1CGbsMMcX0bPIs=
-fyne.io/systray v1.11.0 h1:D9HISlxSkx+jHSniMBR6fCFOUjk1x/OOOJLa9lJYAKg=
-fyne.io/systray v1.11.0/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs=
-github.com/BurntSushi/toml v1.4.0 h1:kuoIxZQy2WRRk1pttg9asf+WVv6tWQuBNVmK8+nqPr0=
-github.com/BurntSushi/toml v1.4.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+fyne.io/fyne/v2 v2.7.4 h1:OVCI5mT+Onb2kA4wlmGA5pLCqKik9f4NDb5jiR1OMTc=
+fyne.io/fyne/v2 v2.7.4/go.mod h1:ZD1mmhBY75mSa97IXl3MPlICd1uNHfCXYh5hKIlVOII=
+fyne.io/systray v1.12.1 h1:ygBD6aZXwiOmZoY5N+ukbH9pih0Kq6fYgVeMYbr5skQ=
+fyne.io/systray v1.12.1/go.mod h1:RVwqP9nYMo7h5zViCBHri2FgjXF7H2cub7MAq4NSoLs=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/felixge/fgprof v0.9.3 h1:VvyZxILNuCiUCSXtPtYmmtGvb65nqXh2QFWc0Wpf2/g=
 github.com/felixge/fgprof v0.9.3/go.mod h1:RdbpDgzqYVh/T9fPELJyV7EYJuHB55UTEULNun8eiPw=
-github.com/fredbi/uri v1.1.0 h1:OqLpTXtyRg9ABReqvDGdJPqZUxs8cyBDOMXBbskCaB8=
-github.com/fredbi/uri v1.1.0/go.mod h1:aYTUoAXBOq7BLfVJ8GnKmfcuURosB1xyHDIfWeC/iW4=
+github.com/fredbi/uri v1.1.1 h1:xZHJC08GZNIUhbP5ImTHnt5Ya0T8FI2VAwI/37kh2Ko=
+github.com/fredbi/uri v1.1.1/go.mod h1:4+DZQ5zBjEwQCDmXW5JdIjz0PUA+yJbvtBv+u+adr5o=
 github.com/fsnotify/fsnotify v1.9.0 h1:2Ml+OJNzbYCTzsxtv8vKSFD9PbJjmhYF14k/jKC7S9k=
 github.com/fsnotify/fsnotify v1.9.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 github.com/fyne-io/gl-js v0.2.0 h1:+EXMLVEa18EfkXBVKhifYB6OGs3HwKO3lUElA0LlAjs=
@@ -19,18 +19,18 @@ github.com/fyne-io/glfw-js v0.3.0 h1:d8k2+Y7l+zy2pc7wlGRyPfTgZoqDf3AI4G+2zOWhWUk
 github.com/fyne-io/glfw-js v0.3.0/go.mod h1:Ri6te7rdZtBgBpxLW19uBpp3Dl6K9K/bRaYdJ22G8Jk=
 github.com/fyne-io/image v0.1.1 h1:WH0z4H7qfvNUw5l4p3bC1q70sa5+YWVt6HCj7y4VNyA=
 github.com/fyne-io/image v0.1.1/go.mod h1:xrfYBh6yspc+KjkgdZU/ifUC9sPA5Iv7WYUBzQKK7JM=
-github.com/fyne-io/oksvg v0.1.0 h1:7EUKk3HV3Y2E+qypp3nWqMXD7mum0hCw2KEGhI1fnBw=
-github.com/fyne-io/oksvg v0.1.0/go.mod h1:dJ9oEkPiWhnTFNCmRgEze+YNprJF7YRbpjgpWS4kzoI=
+github.com/fyne-io/oksvg v0.2.0 h1:mxcGU2dx6nwjJsSA9PCYZDuoAcsZ/OuJlvg/Q9Njfo8=
+github.com/fyne-io/oksvg v0.2.0/go.mod h1:dJ9oEkPiWhnTFNCmRgEze+YNprJF7YRbpjgpWS4kzoI=
 github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71 h1:5BVwOaUSBTlVZowGO6VZGw2H/zl9nrd3eCZfYV+NfQA=
 github.com/go-gl/gl v0.0.0-20231021071112-07e5d0ea2e71/go.mod h1:9YTyiznxEY1fVinfM7RvRcjRHbw2xLBJ3AAGIT0I4Nw=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20240506104042-037f3cc74f2a h1:vxnBhFDDT+xzxf1jTJKMKZw3H0swfWk9RpWbBbDK5+0=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20240506104042-037f3cc74f2a/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
-github.com/go-text/render v0.2.0 h1:LBYoTmp5jYiJ4NPqDc2pz17MLmA3wHw1dZSVGcOdeAc=
-github.com/go-text/render v0.2.0/go.mod h1:CkiqfukRGKJA5vZZISkjSYrcdtgKQWRa2HIzvwNN5SU=
-github.com/go-text/typesetting v0.2.1 h1:x0jMOGyO3d1qFAPI0j4GSsh7M0Q3Ypjzr4+CEVg82V8=
-github.com/go-text/typesetting v0.2.1/go.mod h1:mTOxEwasOFpAMBjEQDhdWRckoLLeI/+qrQeBCTGEt6M=
-github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066 h1:qCuYC+94v2xrb1PoS4NIDe7DGYtLnU2wWiQe9a1B1c0=
-github.com/go-text/typesetting-utils v0.0.0-20241103174707-87a29e9e6066/go.mod h1:DDxDdQEnB70R8owOx3LVpEFvpMK9eeH1o2r0yZhFI9o=
+github.com/go-text/render v0.2.1 h1:qwHhxqGUjjg4L0XyJWj7M7bpY75NZM+kBpv2Yfw5mcg=
+github.com/go-text/render v0.2.1/go.mod h1:HCCAq8MUlm/WRcXshBb4K/n+IkjeXQ1c2Ba+yICSm0A=
+github.com/go-text/typesetting v0.3.4 h1:YYurUOtEb9kGSOz4uE3k4OpBGsp1dDL8+fjCeaFamAU=
+github.com/go-text/typesetting v0.3.4/go.mod h1:4qZCQphq4KSgGTAeI0uMEkVbROgfah8BuyF5LRYr7XY=
+github.com/go-text/typesetting-utils v0.0.0-20260223113751-2d88ac90dae3 h1:drBZzMgdYPbmyXqOto4YhhJGrFIQCX94FpR4MzTCsos=
+github.com/go-text/typesetting-utils v0.0.0-20260223113751-2d88ac90dae3/go.mod h1:3/62I4La/HBRX9TcTpBj4eipLiwzf+vhI+7whTc9V7o=
 github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
 github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/google/pprof v0.0.0-20211214055906-6f57359322fd h1:1FjCyPC+syAzJ5/2S8fqdZK1R22vvA0J7JZKcuOIQ7Y=
@@ -45,6 +45,8 @@ github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25 h1:YLvr1eE6cdCqjOe9
 github.com/jsummers/gobmp v0.0.0-20230614200233-a9de23ed2e25/go.mod h1:kLgvv7o6UM+0QSf0QjAse3wReFDsb9qbZJdfexWlrQw=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mattn/go-runewidth v0.0.17 h1:78v8ZlW0bP43XfmAfPsdXcoNCelfMHsDmd/pkENfrjQ=
+github.com/mattn/go-runewidth v0.0.17/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
 github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=
 github.com/nicksnyder/go-i18n/v2 v2.5.1 h1:IxtPxYsR9Gp60cGXjfuR/llTqV8aYMsC472zD0D1vHk=
@@ -55,16 +57,18 @@ github.com/pkg/profile v1.7.0 h1:hnbDkaNWPCLMO9wGLdBFTIZvzDrDfBM2072E1S9gJkA=
 github.com/pkg/profile v1.7.0/go.mod h1:8Uer0jas47ZQMJ7VD+OHknK4YDY07LPUC6dEvqDjvNo=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/robfig/cron/v3 v3.0.1 h1:WdRxkvbJztn8LMz/QEvLN5sBU+xKpSqwwUO1Pjr4qDs=
 github.com/robfig/cron/v3 v3.0.1/go.mod h1:eQICP3HwyT7UooqI/z+Ov+PtYAWygg1TEWWzGIFLtro=
-github.com/rymdport/portal v0.4.1 h1:2dnZhjf5uEaeDjeF/yBIeeRo6pNI2QAKm7kq1w/kbnA=
-github.com/rymdport/portal v0.4.1/go.mod h1:kFF4jslnJ8pD5uCi17brj/ODlfIidOxlgUDTO5ncnC4=
+github.com/rymdport/portal v0.4.2 h1:7jKRSemwlTyVHHrTGgQg7gmNPJs88xkbKcIL3NlcmSU=
+github.com/rymdport/portal v0.4.2/go.mod h1:kFF4jslnJ8pD5uCi17brj/ODlfIidOxlgUDTO5ncnC4=
 github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c h1:km8GpoQut05eY3GiYWEedbTT0qnSxrCjsVbb7yKY1KE=
 github.com/srwiley/oksvg v0.0.0-20221011165216-be6e8873101c/go.mod h1:cNQ3dwVJtS5Hmnjxy6AgTPd0Inb3pW05ftPSX7NZO7Q=
 github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef h1:Ch6Q+AZUxDBCVqdkI8FSpFyZDtCVBc2VmejdNrm5rRQ=
 github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef/go.mod h1:nXTWP6+gD5+LUJ8krVhhoeHjvHTutPxMYl5SvkcnJNE=
-github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
 github.com/yuin/goldmark v1.7.8 h1:iERMLn0/QJeHFhxSt3p6PeN9mGnvIKSpG9YYorDMnic=
 github.com/yuin/goldmark v1.7.8/go.mod h1:uzxRWxtg69N339t3louHJ7+O03ezfj6PlliRlaOzY1E=
 go.yaml.in/yaml/v4 v4.0.0-rc.5 h1:JVliQq9EGOYaTgMi+k8BhUJyqcGk4ZqeuiN1Cirba9c=

packaging/windows/gosentry.rc

@@ -1 +1,10 @@
+// The same multi-size .ico is embedded under two resource names on purpose:
+//   IDI_ICON1 - the lowest-id icon, which Windows Explorer / shortcuts use for the
+//               executable's file icon.
+//   GLFW_ICON - the name GLFW looks up to icon the window. Because run.go does NOT
+//               call a.SetIcon on Windows, GLFW falls back to this resource and
+//               selects the right frame per size (hand-tuned 16 for the titlebar,
+//               a larger frame for the taskbar). See assets/assets.go for the full
+//               cross-platform icon strategy.
 IDI_ICON1 ICON "assets/gosentry.ico"
+GLFW_ICON ICON "assets/gosentry.ico"

src/ui/run.go

@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"runtime"
 	"time"
 
 	"gitea.mixdep.ru/mix/gosentry/assets"
@@ -30,7 +31,20 @@ func Run(startInTray bool) {
 	// A stable app ID lets Fyne persist desktop preferences consistently across
 	// launches and gives tray/window integration a predictable identity.
 	a := fyneapp.NewWithID(appID)
-	a.SetIcon(loadAppIcon())
+	// On Windows the multi-resolution gosentry.ico (embedded under the GLFW_ICON
+	// resource name) drives the window: GLFW picks the hand-tuned 16x16 for the
+	// titlebar and the large artwork for the bigger taskbar icon — size-appropriate
+	// in a way a single Fyne SetIcon resource cannot be, since one PNG would be
+	// scaled to both sizes.
+	//
+	// Other platforms have no PE icon. Fyne's single SetIcon resource feeds
+	// _NET_WM_ICON, which the window manager renders small (~16px) in the titlebar,
+	// so use the hand-tuned small icon there to keep it crisp. The larger
+	// dock/launcher icon comes from the .desktop entry installed by
+	// InstallDesktopIcon, which uses the big artwork.
+	if runtime.GOOS != "windows" {
+		a.SetIcon(assets.IconSmall())
+	}
 
 	w := a.NewWindow("GoSentry " + app.Version)
 	configureSystemTray(a, w)
@@ -54,7 +68,3 @@ func Run(startInTray bool) {
 	recordStartup(time.Since(started), true)
 	a.Run()
 }
-
-func loadAppIcon() fyne.Resource {
-	return assets.Icon()
-}

src/ui/tray.go

@@ -1,6 +1,10 @@
 package ui
 
 import (
+	"runtime"
+
+	"gitea.mixdep.ru/mix/gosentry/assets"
+
 	"fyne.io/fyne/v2"
 	fynedesktop "fyne.io/fyne/v2/driver/desktop"
 )
@@ -13,6 +17,17 @@ func configureSystemTray(a fyne.App, w fyne.Window) {
 		return
 	}
 
+	// The tray icon is platform-specific. The Windows notification area is
+	// ICO-native and renders at 16-24px, so a single 16x16 .ico frame keeps the
+	// hand-tuned glyph crisp with correct alpha. Linux/macOS trays
+	// (StatusNotifierItem) render much larger (22-48px) and take a PNG, so the
+	// full-size artwork scales down cleanly instead of upscaling the tiny 16x16.
+	if runtime.GOOS == "windows" {
+		desk.SetSystemTrayIcon(assets.IconSmallICO())
+	} else {
+		desk.SetSystemTrayIcon(assets.Icon())
+	}
+
 	// IsQuit marks this as the tray's quit item. Without it Fyne's
 	// addMissingQuitForMenu appends a second, localized Quit (e.g. "Выход" on a
 	// Russian system) because it only recognizes an existing quit by matching the