feat(ui-compose): add the breadcrumb model

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

3 files changed, 50 insertions, 0 deletions

diff --git a/ui/compose/build.gradle.kts b/ui/compose/build.gradle.kts
index b4f195cf..81d1e4cd 100644
--- a/ui/compose/build.gradle.kts
+++ b/ui/compose/build.gradle.kts
@@ -22,4 +22,5 @@ dependencies {
   api(libs.compose.ui.core)
   implementation(libs.androidx.core.ktx)
   implementation(libs.compose.ui.tooling)
+  testImplementation(libs.bundles.testDependencies)
 }
diff --git a/ui/compose/src/main/kotlin/app/passwordstore/ui/compose/Breadcrumbs.kt b/ui/compose/src/main/kotlin/app/passwordstore/ui/compose/Breadcrumbs.kt
new file mode 100644
index 00000000..d8bc02fe
--- /dev/null
+++ b/ui/compose/src/main/kotlin/app/passwordstore/ui/compose/Breadcrumbs.kt
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package app.passwordstore.ui.compose
+
+/** One breadcrumb chip. The root crumb has an empty [label] and [path]. */
+public data class Crumb(val label: String, val path: String)
+
+/** Crumbs for a folder at [relativePath] inside the store: root first, then each level. */
+public fun crumbsFor(relativePath: String): List<Crumb> {
+  val parts = relativePath.split('/').filter { it.isNotEmpty() }
+  return listOf(Crumb("", "")) +
+    parts.indices.map { i -> Crumb(parts[i], parts.subList(0, i + 1).joinToString("/")) }
+}
diff --git a/ui/compose/src/test/kotlin/app/passwordstore/ui/compose/BreadcrumbsTest.kt b/ui/compose/src/test/kotlin/app/passwordstore/ui/compose/BreadcrumbsTest.kt
new file mode 100644
index 00000000..2eb4c3fc
--- /dev/null
+++ b/ui/compose/src/test/kotlin/app/passwordstore/ui/compose/BreadcrumbsTest.kt
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package app.passwordstore.ui.compose
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class BreadcrumbsTest {
+
+  @Test
+  fun rootOnly() {
+    assertEquals(listOf(Crumb("", "")), crumbsFor(""))
+  }
+
+  @Test
+  fun nestedPath() {
+    assertEquals(
+      listOf(Crumb("", ""), Crumb("work", "work"), Crumb("servers", "work/servers")),
+      crumbsFor("work/servers"),
+    )
+  }
+
+  @Test
+  fun ignoresStraySlashes() {
+    assertEquals(
+      listOf(Crumb("", ""), Crumb("work", "work"), Crumb("servers", "work/servers")),
+      crumbsFor("/work//servers/"),
+    )
+  }
+}