fix(bridge): make the app-icon object a real input of the mingw link

Editing an app-icon PNG rebuilt the .ico and the windres .o and then left the
link UP-TO-DATE, so the .exe silently kept the OLD embedded icon. Reproduced on
:apidemo - generateComposeNativeIco and compileComposeNativeIconResource both
re-ran, linkDebugExecutableMingwX64 reported UP-TO-DATE, and the executable's
md5 did not move.

The link was wired with a bare `dependsOn(windresTask)`, which only ORDERS the
two. The object's path reaches the linker as a `linkerOpts` STRING, so the path
is an input but its CONTENT never is - nothing about a changed .o could
invalidate the link.

Replaced with `inputs.files(windresTask)`, which carries the task dependency AND
puts the object's content into the up-to-date check. Verified: the link now
re-runs and the .exe changes when an icon PNG is edited, in both directions.

The .rgba window-icon blobs were never affected - they go into the data.kres Zip
via `from(dir)`, and a Copy spec is already a declared input.

Also annotates the three icon task types with @DisableCachingByDefault. They
had no cacheability declaration, which failed `validatePlugins` and with it
:compose-desktop-native-bridge:build; that failure predates this change.

PLAN.md

@@ -813,6 +813,18 @@ Two residuals, neither a text-metrics bug:
   (0.29% at +0px vs 2.13% at +1px), where before +2px halved the error. The residual 0.29%
   is rasterizer AA.
 
+- **Icon-font glyphs rendered LOW - ✅ FIXED.** Material Symbols sat 2-4px lower on native
+  than on jvm, the offset scaling with icon size (~13% of it). Cause: the JVM actual centres
+  the glyph explicitly (`y = height/2 - (ascent+descent)/2`), while `IconFontIcon` placed
+  `IconText` in a Box at the DEFAULT TopStart alignment - and the glyph's natural text box is
+  taller than the nominal icon size. Fixed by centring, with
+  `wrapContentSize(unbounded = true)` so the text measures at its natural size first:
+  `Modifier.size()` imposes FIXED constraints, so without it nothing overflows and
+  contentAlignment is a no-op (a first attempt without it changed literally nothing).
+  gear/download/lock are now pixel-exact; the eye is 1px off from half-pixel rounding (odd
+  glyph height centred in an even box; jvm draws at a float y, native placement is integer).
+  Whole-window >32/255 drift 0.29% -> 0.17%.
+
 - **Missing glyph in the session header.** The leading icon next to "Untitled session"
   renders as a `.notdef` TOFU on jvm and as NOTHING on native - so the glyph is absent from
   the subsetted Material Symbols font on both, and the two stacks just disagree on how to

compose/foundation/foundation/src/nativeMain/kotlin/com/compose/sdl/icons/IconFontIcon.kt

@@ -2,7 +2,9 @@ package com.compose.sdl.icons
 
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.wrapContentSize
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.text.font.FontVariation
@@ -36,9 +38,21 @@ fun IconFontIcon(
 	size: Dp = IconDefaults.DefaultIconSize,
 	fontVariationSettings: List<FontVariation.Setting>? = null,
 ) {
-	Box(modifier = modifier.size(size)) {
+	// CENTER the glyph in the icon box. The glyph's natural text box is TALLER than
+	// `size` - its height is the font's ascent+descent, and Material Symbols' em box
+	// overshoots the nominal icon size - so the glyph used to render ~13% of the icon
+	// size too LOW. This mirrors the JVM actual's explicit baseline math
+	// (`y = height/2 - (ascent+descent)/2` in MaterialSymbolsIcon.jvm.kt): IconText
+	// sets no lineHeight, so its box height IS ascent+descent and centering that box
+	// centers the same span the JVM centers.
+	//
+	// `wrapContentSize(unbounded = true)` is load-bearing: Modifier.size() hands the
+	// child FIXED constraints, so without it the text is measured at exactly `size`,
+	// nothing overflows, and contentAlignment has nothing to align.
+	Box(modifier = modifier.size(size), contentAlignment = Alignment.Center) {
 		com.compose.sdl.text.IconText(
 			text = codepointToString(codepoint),
+			modifier = Modifier.wrapContentSize(Alignment.Center, unbounded = true),
 			fontFamily = fontFamily,
 			color = tint,
 			fontSize = size.value.sp,

gradle-plugin/compose-desktop-native-bridge/src/main/kotlin/com/bitsycore/compose/sdl/gradle/AppIcon.kt

@@ -10,6 +10,7 @@ import org.gradle.api.tasks.OutputDirectory
 import org.gradle.api.tasks.OutputFile
 import org.gradle.api.tasks.PathSensitive
 import org.gradle.api.tasks.PathSensitivity
+import org.gradle.work.DisableCachingByDefault
 import org.gradle.api.tasks.TaskAction
 import java.io.File
 import java.util.zip.Inflater
@@ -91,10 +92,23 @@ internal fun installAppIcon(inProject: Project, inExt: ComposeDesktopNativeExten
 		}
 		// Link the object last: the mingw link tasks must run windres first (the
 		// path is referenced via linkerOpts, added reflectively in NativeApplication).
+		//
+		// `inputs.files(task)` rather than a bare `dependsOn`: dependsOn only orders
+		// the two, it does NOT make the object's CONTENT part of the link's up-to-date
+		// check. The .o path reaches the linker as a linkerOpts STRING, which is an
+		// input only as a string - so editing an icon PNG rebuilt the .ico and the .o
+		// and then left the link UP-TO-DATE, silently shipping an .exe with the OLD
+		// icon embedded. Declaring the task's outputs as link inputs carries the
+		// dependency AND invalidates on content.
 		inProject.tasks.matching {
 			it.name == "linkDebugExecutableMingwX64" || it.name == "linkReleaseExecutableMingwX64" ||
 				it.name == "runDebugExecutableMingwX64" || it.name == "runReleaseExecutableMingwX64"
-		}.configureEach { it.dependsOn(vWindresTask) }
+		}.configureEach { task ->
+			task.inputs.files(vWindresTask)
+				.withPropertyName("composeNativeAppIconObject")
+				.withPathSensitivity(PathSensitivity.NONE)
+			task.dependsOn(vWindresTask)
+		}
 	}
 }
 
@@ -102,6 +116,7 @@ internal fun installAppIcon(inProject: Project, inExt: ComposeDesktopNativeExten
 // MARK: Tasks
 // ==================
 
+@DisableCachingByDefault(because = "trivial PNG decode; caching would cost more than it saves")
 abstract class GenerateRgbaIconsTask : DefaultTask() {
 	@get:InputFiles
 	@get:PathSensitive(PathSensitivity.NONE)
@@ -124,6 +139,7 @@ abstract class GenerateRgbaIconsTask : DefaultTask() {
 	}
 }
 
+@DisableCachingByDefault(because = "trivial byte concatenation of already-local PNGs")
 abstract class GenerateIcoTask : DefaultTask() {
 	@get:InputFiles
 	@get:PathSensitive(PathSensitivity.NONE)
@@ -140,6 +156,7 @@ abstract class GenerateIcoTask : DefaultTask() {
 	}
 }
 
+@DisableCachingByDefault(because = "shells out to the host windres; not portable across machines")
 abstract class CompileWindowsIconResourceTask : DefaultTask() {
 	@get:InputFiles
 	@get:PathSensitive(PathSensitivity.NONE)

gradle-plugin/compose-desktop-native-bridge/src/main/kotlin/com/bitsycore/compose/sdl/gradle/ResourcePackaging.kt

@@ -88,6 +88,26 @@ private fun registerDataKresTasks(project: Project) {
 				val compress = project.providers.gradleProperty("compressResources").orNull?.toBoolean() ?: false
 				task.entryCompression = if (compress) ZipEntryCompression.DEFLATED else ZipEntryCompression.STORED
 				task.duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+				// MULTI-MODULE: source from Kotlin's per-target resource AGGREGATE, which
+				// already merges this project's OWN composeResources with those of every
+				// dependency module (each under its own `composeResources/<package>/`).
+				// Reading the project's `preparedResources/` instead - as this did - silently
+				// dropped every library module's resources from data.kres, and forced a
+				// single `resPackage` onto the lot, which is wrong the moment more than one
+				// module contributes.
+				//
+				// The aggregate directory is already rooted at `composeResources/`, so it is
+				// copied in with NO `into()` remapping.
+				val aggregateName = "${target.replaceFirstChar { it.lowercase() }}AggregateResources"
+				if (aggregateName in project.tasks.names) {
+					val aggregated = project.layout.buildDirectory.dir(
+						"kotlin-multiplatform-resources/aggregated-resources/${target.replaceFirstChar { it.lowercase() }}"
+					)
+					task.from(aggregated)
+					task.dependsOn(project.tasks.named(aggregateName))
+				} else {
+					// Fallback for Kotlin versions without the resources-aggregation tasks:
+					// this project's own resources only (the pre-existing behaviour).
 					val resPackage = project.resolveResourcePackage()
 					val prepareNames = sourceSets
 						.map { "prepareComposeResourcesTaskFor" + it.replaceFirstChar { c -> c.uppercase() } }
@@ -102,6 +122,7 @@ private fun registerDataKresTasks(project: Project) {
 						task.dependsOn(project.tasks.named(prepareName))
 					}
 				}
+			}
 			project.tasks.matching { it.name == linkName }.configureEach { it.dependsOn(zipTask) }
 		}
 	}