fe: dress the app as windows 11 there, it read as a web page in a window

CLAUDE.md

@@ -23,6 +23,8 @@ log found in one line what two rounds of guessing had missed.
 
 Never enable the inspector outside `-debug`.
 
+`make debug` asks which OS to look like, so the Windows or Linux theme can be checked from a Mac. It sets `ADMINER_DESKTOP_SIMULATE_OS`, ignored without `-debug`. It changes the look and the window only (`Os::look()`): the engine stays WKWebView, and without Segoe the font falls back.
+
 PHP fatal errors reach `~/Library/Logs/Adminer Desktop/adminer-desktop.log`, but only
 because `app/php/desktop.ini` turns `log_errors` on — frankenphp's default sends them to
 the page and nowhere else. `make logs` or the Open Logs menu item opens the folder.
@@ -176,7 +178,7 @@ into components pulled in by `@import`: `tokens`, `base`, `tables`, `forms`, `si
 `settings`. `light-dark()` is colour-only, so the one non-colour scheme difference —
 inverting adminer's sprite icons on the dark surface — lives in `base.css` and keys off the
 `theme-auto`/`theme-dark` body class instead. `system-ui` gives the native OS font with no
-branching; the `theme-*`, `os-mac`/`os-windows`/`os-linux` and `density-compact`/`-cozy`/
+branching; the `theme-*`, `mac-os`/`windows-os`/`linux-os` and `density-compact`/`-cozy`/
 `-comfortable` body classes come from `AdminerDesktop::bodyClass()` and are the hooks for
 appearance, per-OS and per-density tweaks. oxfmt owns the formatting — one declaration per
 line.

Makefile

@@ -328,8 +328,8 @@ qa: fetch app/vendor i18n mcp-bridge-data  ## Run every static check (php, go, j
 			|| { echo "launcher: no non-darwin definition of $$f() (menu_other.go stub, or *_linux.go + *_other.go or *_windows.go split)"; exit 1; }; \
 	done && echo "platform stubs ok"
 	@command -v shellcheck >/dev/null \
-		&& { shellcheck check.sh cli/compile-adminer.sh cli/dresscode.sh cli/kill-orphans.sh cli/demo-mysql.sh tests/cli/dresscode-test.sh tests/cli/dresscode-hook-test.sh tests/cli/kill-orphans-test.sh tests/launcher/downloads.sh && echo "shellcheck ok"; } \
-		|| { sh -n check.sh && sh -n cli/compile-adminer.sh && sh -n cli/dresscode.sh && sh -n cli/kill-orphans.sh && sh -n cli/demo-mysql.sh && echo "sh ok (shellcheck not installed)"; }
+		&& { shellcheck check.sh cli/pick-os.sh tests/cli/pick-os-test.sh cli/compile-adminer.sh cli/dresscode.sh cli/kill-orphans.sh cli/demo-mysql.sh tests/cli/dresscode-test.sh tests/cli/dresscode-hook-test.sh tests/cli/kill-orphans-test.sh tests/launcher/downloads.sh && echo "shellcheck ok"; } \
+		|| { sh -n check.sh && sh -n cli/pick-os.sh && sh -n tests/cli/pick-os-test.sh && sh -n cli/compile-adminer.sh && sh -n cli/dresscode.sh && sh -n cli/kill-orphans.sh && sh -n cli/demo-mysql.sh && echo "sh ok (shellcheck not installed)"; }
 	@# Native-shell strings: the `i18n` prerequisite already generated the real files (which is
 	@# also what makes i18n_gen.h exist before `go vet` compiles the cgo launcher above). Assert the
 	@# generator's output quality and lint the emitted plists. `make i18n-check` reports coverage.
@@ -338,6 +338,7 @@ qa: fetch app/vendor i18n mcp-bridge-data  ## Run every static check (php, go, j
 	./bin/frankenphp$(EXE) php-cli tests/shortcuts/ShortcutsTest.php
 	./bin/frankenphp$(EXE) php-cli tests/cli/WindowsIcoTest.php
 	./bin/frankenphp$(EXE) php-cli tests/cli/I18nTest.php
+	@sh tests/cli/pick-os-test.sh
 	@sh tests/cli/kill-orphans-test.sh
 	@sh tests/cli/dresscode-test.sh
 	@sh tests/cli/dresscode-hook-test.sh
@@ -459,8 +460,9 @@ editor: build  ## Run in editor mode
 # Brings up the e2e's seeded mysql beside it, so there is a database to point it at; no
 # docker skips it rather than refusing to debug.
 debug: build  ## Run with Safari's Web Inspector attached, and a seeded mysql (docker)
-	@./cli/demo-mysql.sh $(DEMO_MYSQL) || echo "no mysql: docker is not running"
-	./build.noindex/adminer-desktop$(EXE) -debug
+	@os=$$(./cli/pick-os.sh); \
+	./cli/demo-mysql.sh $(DEMO_MYSQL) || echo "no mysql: docker is not running"; \
+	ADMINER_DESKTOP_SIMULATE_OS=$$os ./build.noindex/adminer-desktop$(EXE) -debug
 
 # The app in dev mode against seeded demo data, for clicking around by hand. Brings up
 # (or reuses) the same throwaway postgres the e2e uses, reseeds it, and opens the app

app/AdminerDesktop.php

@@ -310,7 +310,7 @@ function csp(array &$csp): void {
 	* @return void
 	*/
 	function bodyClass(): void {
-		echo " " . Os::current()->bodyClass();
+		echo " " . Os::look()->bodyClass();
 		// The launcher sets this under -debug; the desktop scripts read it to stand down so
 		// the web inspector's own behaviour is unobstructed.
 		if (Env::Debug->get()) {

app/src/Assets/javascript/scrollers.js

@@ -12,7 +12,8 @@
  * launcher marks <html> with ad-legacy-scrollers) the panels' thumbs are ours too, only always on
  * screen and as thick as Mail's: WebKit's own took a column of the panel, and the toolbar inside
  * #content, its hairline and its search, stopped that column short of the window's edge. The
- * inner scrollers keep WebKit's legacy ones. macOS only, as base.css's rules are.
+ * inner scrollers keep WebKit's legacy ones. macOS and Windows, whose own bars fade the same way
+ * (windows-os.css); Linux keeps its own.
  */
 
 {
@@ -29,7 +30,8 @@
 	// Our design only, which hides WebKit's bars and styles the thumb (base.css); --ad-accent is
 	// defined by it alone, as table-nav.js tells it.
 	const ours = () =>
-		document.body?.classList.contains("os-mac") &&
+		(document.body?.classList.contains("mac-os") ||
+			document.body?.classList.contains("windows-os")) &&
 		getComputedStyle(document.documentElement)
 			.getPropertyValue("--ad-accent")
 			.trim() !== "";

app/src/Env.php

@@ -14,6 +14,8 @@ enum Env: string {
 	case DataDir = 'ADMINER_DESKTOP_DATA';
 	/** Set under -debug: turns on Tracy and the web inspector's own affordances. */
 	case Debug = 'ADMINER_DESKTOP_DEBUG';
+	/** Which OS the UI dresses as under -debug, an Os case (Os::look). Ignored without -debug. */
+	case SimulateOs = 'ADMINER_DESKTOP_SIMULATE_OS';
 	/** `make demo` only: the throwaway connection demo-login.js fills and submits. */
 	case Demo = 'ADMINER_DESKTOP_DEMO';
 	/** The launcher's own path (Go's os.Executable), so the MCP panel can print the exact

app/src/Os.php

@@ -28,9 +28,16 @@ static function current(): self {
 		};
 	}
 
+	/** The OS the UI dresses as: the real one, unless -debug asks for another (Env::SimulateOs).
+	* Only for how the page looks. Paths and printed commands stay on current(). */
+	static function look(): self {
+		$simulated = Env::Debug->get() ? self::tryFrom((string) Env::SimulateOs->get()) : null;
+		return $simulated ?? self::current();
+	}
+
 	/** The class on <body> the theme keys off (AdminerDesktop::bodyClass). */
 	function bodyClass(): string {
-		return 'os-' . $this->value;
+		return $this->value . '-os';
 	}
 
 	/** The name a person recognises, for the settings UI. */

app/src/Settings/Theme/Theme.php

@@ -4,6 +4,7 @@
 namespace Desktop\Settings\Theme;
 
 use Desktop\Latte;
+use Desktop\Os;
 use Desktop\SettingKey;
 use Desktop\UserSettings;
 
@@ -15,6 +16,9 @@
 * (include/plugins.inc.php:33), so a helper called AdminerTheme would quietly become one.
 */
 class Theme {
+	private const string OWN_DESIGN = "src/Settings/Theme/designs/adminer-desktop/adminer.css";
+	private const string WINDOWS_SHEET = "src/Settings/Theme/designs/adminer-desktop/windows-os.css";
+
 	private \AdminerDesktop $desktop;
 	private UserSettings $settings;
 
@@ -60,7 +64,27 @@ function designs(Mode $mode): array {
 	* @return array<string,string>
 	*/
 	function cssMap(): array {
-		$self = "src/Settings/Theme/designs/adminer-desktop/adminer.css";
+		$map = $this->designMap();
+		if (Os::look() !== Os::Windows) {
+			return $map;
+		}
+		// Right after ours and tagged the same, so it applies wherever ours does and never over a
+		// gallery design.
+		$return = [];
+		foreach ($map as $path => $mode) {
+			$return[$path] = $mode;
+			if ($path === self::OWN_DESIGN) {
+				$return[self::WINDOWS_SHEET] = $mode;
+			}
+		}
+		return $return;
+	}
+
+	/** Which design each side uses, before anything per-OS is added to it.
+	* @return array<string,string>
+	*/
+	private function designMap(): array {
+		$self = self::OWN_DESIGN;
 		$sides = [];
 		foreach (Mode::cases() as $mode) {
 			$design = (string) $this->settings->get($mode->designKey(), "");

app/src/Settings/Theme/designs/adminer-desktop/README.md

@@ -9,6 +9,7 @@ pulled in by native `@import` from `adminer.css`:
 - `tables.css`  — the data grid
 - `forms.css`   — inputs and buttons
 - `sidebar.css` — the menu and breadcrumb
+- `windows-os.css` — Windows 11's tokens and controls under `windows-os`, with values from WinUI's resources; `Theme::cssMap()` loads it on Windows only, not this file
 
 One file carrying both schemes: every scheme difference is a `light-dark(light, dark)`
 token, and the used `color-scheme` picks the side. Adminer sets that from its
@@ -19,7 +20,7 @@ dark surface, keys off the `theme-auto` / `theme-dark` body class instead (`base
 It is excluded from the gallery (`Theme::designs()`) because it is the default, offered as
 the empty "Adminer Desktop" option on each side rather than one entry among the rest.
 
-Per-OS adaptation is mostly `system-ui` (the OS UI font, no branching); the `os-mac` /
-`os-windows` / `os-linux` body class from `AdminerDesktop::bodyClass()` is the hook for
+Per-OS adaptation is mostly `system-ui` (the OS UI font, no branching); the `mac-os` /
+`windows-os` / `linux-os` body class from `AdminerDesktop::bodyClass()` is the hook for
 the rest. Row density (`density-compact` / `-cozy` / `-comfortable`) comes from the same
 place.

app/src/Settings/Theme/designs/adminer-desktop/base.css

@@ -81,7 +81,7 @@ kbd,
 
 /* macOS renders system-ui (San Francisco) best antialiased; Windows and Linux stay on
    the OS default, where forcing this only thins the text. .os-* comes from bodyClass. */
-.os-mac body {
+.mac-os body {
 	-webkit-font-smoothing: antialiased;
 }
 
@@ -206,28 +206,28 @@ body.theme-dark .icon {
  * system set to hide them — so the panels wore two grey bars at all times. Transparent until
  * hovered (`:hover` holds for every element under the pointer, so the scroller it is in), and
  * thin, as an overlay scrollbar is, and while it scrolls (.ad-scrolling, scrollers.js), as an
- * overlay one appears then. macOS only: Windows and Linux keep theirs on screen natively.
+ * overlay one appears then. Windows has the same in windows-os.css; Linux keeps its own on screen.
  *
  * Only while the system draws overlay scrollbars. With a mouse plugged in, or System Settings set
  * to Always, macOS draws legacy ones that stay on screen, and so does every native app — Mail
  * included; the launcher says which (ad-legacy-scrollers on <html>, installScrollerStyle), and then
  * WebKit's own are left as they are, except the panels' (below). A plain browser is never told,
  * and keeps the overlay behaviour. */
-:root:not(.ad-legacy-scrollers) .os-mac * {
+:root:not(.ad-legacy-scrollers) .mac-os * {
 	scrollbar-width: thin;
 	scrollbar-color: transparent transparent;
 }
 
-:root:not(.ad-legacy-scrollers) .os-mac :is(:hover, .ad-scrolling) {
+:root:not(.ad-legacy-scrollers) .mac-os :is(:hover, .ad-scrolling) {
 	scrollbar-color: color-mix(in srgb, var(--fg) 35%, transparent) transparent;
 }
 
 /* Even transparent, that bar keeps its width, so every rule in the two panels stopped one
    scrollbar short of the right edge. A legacy one takes the same column, and the toolbar's
    hairline and search stopped short of it. So the panels' bars are scrollers.js's in both modes;
    the scrollers inside them keep theirs. */
-.os-mac #menu,
-.os-mac #content {
+.mac-os #menu,
+.mac-os #content {
 	scrollbar-width: none;
 }
 

app/src/Settings/Theme/designs/adminer-desktop/tables.css

@@ -24,30 +24,30 @@ th,
  * finds the true first and last row whether or not the table has a header.
  *
  * macOS only, because a rounded grid is a macOS idiom rather than a house style: Windows and
- * Linux keep the square corners their own tables have, which is what os-mac not matching
+ * Linux keep the square corners their own tables have, which is what mac-os not matching
  * leaves them with. */
-.os-mac table {
+.mac-os table {
 	border-radius: var(--ad-radius);
 }
 
-.os-mac table > :first-child > tr:first-child > :first-child {
+.mac-os table > :first-child > tr:first-child > :first-child {
 	border-top-left-radius: var(--ad-radius);
 }
 
-.os-mac table > :first-child > tr:first-child > :last-child {
+.mac-os table > :first-child > tr:first-child > :last-child {
 	border-top-right-radius: var(--ad-radius);
 }
 
-.os-mac table > :last-child > tr:last-child > :first-child {
+.mac-os table > :last-child > tr:last-child > :first-child {
 	border-bottom-left-radius: var(--ad-radius);
 }
 
-.os-mac table > :last-child > tr:last-child > :last-child {
+.mac-os table > :last-child > tr:last-child > :last-child {
 	border-bottom-right-radius: var(--ad-radius);
 }
 
 /* A settings table's corners, which everything drawing them reads from --ad-radius. */
-.os-mac #desktop-panels table {
+.mac-os #desktop-panels table {
 	--ad-radius: var(--ad-card-radius);
 }
 
@@ -371,17 +371,17 @@ span.ad-page-step {
 }
 
 /* A notice inside the settings dialog, rounded as its tables are. */
-.os-mac dialog#desktop-settings :is(.message, .error) {
+.mac-os dialog#desktop-settings :is(.message, .error) {
 	border-radius: var(--ad-card-radius);
 	padding: 1.2em 1.5em;
 }
 
 /* A select in a dialog's body only: the sidebar's and the pages' keep the UI's tighter corners. */
-.os-mac .ad-modal-body select {
+.mac-os .ad-modal-body select {
 	border-radius: 10px;
 }
 
 /* The saved connections on the index. */
-.os-mac :is(.ad-card, #ad-new-connection) {
+.mac-os :is(.ad-card, #ad-new-connection) {
 	border-radius: var(--ad-card-radius);
 }

app/src/Settings/Theme/designs/adminer-desktop/tokens.css

@@ -165,7 +165,7 @@ html {
 /* macOS 26+ rounds a titled window with a continuous curve, not a circle: 16.5pt at its apex,
    easing into the edges 24pt from the corner (measured off a screenshot of ours). A circular
    corner cannot follow both; 20 sits between them and is the one that reads as parallel. */
-.os-mac {
+.mac-os {
 	--ad-window-radius: 20px;
 	/* What stands on a surface, a table or a card: as round as a message in Mail. */
 	--ad-card-radius: 12px;