diff --git a/src/Client/App.fs b/src/Client/App.fs
index 9bccd8a..5e836b4 100644
--- a/src/Client/App.fs
+++ b/src/Client/App.fs
@@ -123,13 +123,9 @@ let filterDeletedPaths (deleted: Set<string>) (repos: RepoModel list) =
             { r with Worktrees = r.Worktrees |> List.filter (fun wt -> not (Set.contains (WorktreePath.value wt.Path) deleted)) })
 
 let findWorktree (scopedKey: string) (model: Model) =
-    let parts = scopedKey.Split('/', 2)
-    if parts.Length < 2 then None
-    else
-        let repoId, branch = parts[0], parts[1]
-        model.Repos
-        |> List.tryFind (fun r -> RepoId.value r.RepoId = repoId)
-        |> Option.bind (fun r -> r.Worktrees |> List.tryFind (fun wt -> wt.Branch = branch))
+    model.Repos
+    |> List.tryPick (fun r ->
+        r.Worktrees |> List.tryFind (fun wt -> WorktreePath.value wt.Path = scopedKey))
 
 let removeFromRepos (path: WorktreePath) (repos: RepoModel list) =
     let pathStr = WorktreePath.value path
@@ -258,7 +254,7 @@ let update msg model =
                     if r.RepoId = repoId then { r with IsCollapsed = not r.IsCollapsed }
                     else r) }
         let focusAdjusted =
-            if isCollapsing then adjustFocusAfterCollapse repoId updatedModel.FocusedElement
+            if isCollapsing then adjustFocusAfterCollapse repoId updatedModel.Repos updatedModel.FocusedElement
             else updatedModel.FocusedElement
         let collapsedRepos =
             updatedModel.Repos
@@ -1109,12 +1105,13 @@ let prRow dispatch (cooldowns: Set<WorktreePath>) (wt: WorktreeStatus) (repoName
 let workMetricsView = Components.workMetricsView
 let workMetricsItems = Components.workMetricsItems
 let FitOrHide = Components.FitOrHide
+let cardTitle = Components.cardTitle
 
 let compactWorktreeCard dispatch editorName (repoName: string) (baseBranch: string) (cooldowns: Set<WorktreePath>) (scopedKey: string) (isFocused: bool) (wt: WorktreeStatus) =
     let baseClass = cardClassName wt + " compact"
     let className = if isFocused then baseClass + " focused" else baseClass
     Html.div [
-        prop.key wt.Branch
+        prop.key (WorktreePath.value wt.Path)
         prop.className className
         prop.onClick (fun _ -> dispatch (SetFocus (Some (Card scopedKey))))
         prop.children [
@@ -1125,7 +1122,7 @@ let compactWorktreeCard dispatch editorName (repoName: string) (baseBranch: stri
                         prop.className "header-info"
                         prop.children [
                             Html.span [ prop.className ($"ct-dot {ctClassName wt.CodingTool}"); prop.title (ctTooltip wt.CodingTool) ]
-                            Html.span [ prop.className "branch-name"; prop.text wt.Branch ]
+                            Html.span [ prop.className "branch-name"; prop.text (cardTitle wt) ]
                             FitOrHide (workMetricsItems wt.WorkMetrics)
                         ]
                     ]
@@ -1155,7 +1152,7 @@ let worktreeCard dispatch editorName (repoName: string) (baseBranch: string) (co
     let hasContent = wt.LastUserMessage.IsSome || (not (List.isEmpty branchEvents))
     let footerClass = if hasContent then "card-footer has-content" else "card-footer"
     Html.div [
-        prop.key wt.Branch
+        prop.key (WorktreePath.value wt.Path)
         prop.className className
         prop.onClick (fun _ -> dispatch (SetFocus (Some (Card scopedKey))))
         prop.children [
@@ -1169,7 +1166,7 @@ let worktreeCard dispatch editorName (repoName: string) (baseBranch: string) (co
                                 prop.className "header-info"
                                 prop.children [
                                     Html.span [ prop.className ($"ct-dot {ctClassName wt.CodingTool}"); prop.title (ctTooltip wt.CodingTool) ]
-                                    Html.span [ prop.className "branch-name"; prop.text wt.Branch ]
+                                    Html.span [ prop.className "branch-name"; prop.text (cardTitle wt) ]
                                     FitOrHide (workMetricsItems wt.WorkMetrics)
                                 ]
                             ]
@@ -1218,7 +1215,7 @@ let worktreeCard dispatch editorName (repoName: string) (baseBranch: string) (co
     ]
 
 let renderCard dispatch editorName isCompact (focusedElement: FocusTarget option) repoId repoName baseBranch (branchEvents: Map<string, CardEvent list>) (syncPending: Set<string>) (cooldowns: Set<WorktreePath>) (wt: WorktreeStatus) =
-    let scopedKey = $"{repoId}/{wt.Branch}"
+    let scopedKey = WorktreePath.value wt.Path
     let events = branchEvents |> Map.tryFind scopedKey |> Option.defaultValue []
     let isPending = syncPending |> Set.contains scopedKey
     let isFocused = focusedElement = Some (Card scopedKey)
diff --git a/src/Client/ArchiveViews.fs b/src/Client/ArchiveViews.fs
index 9f0aec1..bd1ca5b 100644
--- a/src/Client/ArchiveViews.fs
+++ b/src/Client/ArchiveViews.fs
@@ -44,10 +44,10 @@ let archiveIcon =
 
 let archiveCard dispatch (wt: WorktreeStatus) =
     Html.div [
-        prop.key wt.Branch
+        prop.key (WorktreePath.value wt.Path)
         prop.className "archive-card"
         prop.children [
-            Html.span [ prop.className "branch-name"; prop.text wt.Branch ]
+            Html.span [ prop.className "branch-name"; prop.text (cardTitle wt) ]
             workMetricsView wt.WorkMetrics
             Html.span [ prop.className "commit-time"; prop.text (relativeTime System.DateTimeOffset.Now wt.LastCommitTime) ]
             Html.button [
diff --git a/src/Client/Components.fs b/src/Client/Components.fs
index 8a21e29..dd152e8 100644
--- a/src/Client/Components.fs
+++ b/src/Client/Components.fs
@@ -13,6 +13,10 @@ let relativeTime (now: System.DateTimeOffset) (dt: System.DateTimeOffset) =
     | d when d.TotalHours < 24.0 -> $"{int d.TotalHours}h ago"
     | d -> $"{int d.TotalDays}d ago"
 
+let cardTitle (wt: WorktreeStatus) =
+    if wt.Branch = WorktreeStatus.DetachedBranchName then WorktreePath.displayName wt.Path
+    else wt.Branch
+
 // ResizeObserver interop
 [<Emit("new ResizeObserver($0)")>]
 let private createResizeObserver (callback: obj -> unit) : obj = jsNative
diff --git a/src/Client/Navigation.fs b/src/Client/Navigation.fs
index 4529c6f..d3bbfb3 100644
--- a/src/Client/Navigation.fs
+++ b/src/Client/Navigation.fs
@@ -6,7 +6,7 @@ open Fable.Core.JsInterop
 
 type FocusTarget =
     | RepoHeader of RepoId
-    | Card of scopedKey: string
+    | Card of path: string
 
 type RepoModel =
     { RepoId: RepoId
@@ -31,11 +31,10 @@ type RepoNav =
 let visibleFocusTargets (repos: RepoModel list) =
     repos
     |> List.collect (fun repo ->
-        let repoId = RepoId.value repo.RepoId
         let header = RepoHeader repo.RepoId
         if repo.IsCollapsed then [ header ]
         else
-            header :: (repo.Worktrees |> List.map (fun wt -> Card $"{repoId}/{wt.Branch}")))
+            header :: (repo.Worktrees |> List.map (fun wt -> Card (WorktreePath.value wt.Path))))
 
 let getColumnCount () =
     Dom.document.querySelector ".card-grid"
@@ -48,12 +47,11 @@ let getColumnCount () =
 let repoNavSections (repos: RepoModel list) =
     repos
     |> List.map (fun repo ->
-        let repoId = RepoId.value repo.RepoId
         { RepoId = repo.RepoId
           Header = RepoHeader repo.RepoId
           Cards =
             if repo.IsCollapsed then []
-            else repo.Worktrees |> List.map (fun wt -> Card $"{repoId}/{wt.Branch}") })
+            else repo.Worktrees |> List.map (fun wt -> Card (WorktreePath.value wt.Path)) })
 
 let navigateLinear (direction: int) (targets: FocusTarget list) (current: FocusTarget option) =
     match targets, current with
@@ -217,12 +215,13 @@ let navigateToLast (repos: RepoModel list) =
     | [] -> None
     | _ -> Some (List.last targets)
 
-let adjustFocusAfterCollapse (collapsedRepoId: RepoId) (focusedElement: FocusTarget option) =
+let adjustFocusAfterCollapse (collapsedRepoId: RepoId) (repos: RepoModel list) (focusedElement: FocusTarget option) =
     match focusedElement with
-    | Some (Card scopedKey) ->
-        let repoIdStr = RepoId.value collapsedRepoId
-        if scopedKey.StartsWith(repoIdStr + "/") then Some (RepoHeader collapsedRepoId)
-        else focusedElement
+    | Some (Card path) ->
+        repos
+        |> List.tryFind (fun r -> r.RepoId = collapsedRepoId)
+        |> Option.exists (fun r -> r.Worktrees |> List.exists (fun wt -> WorktreePath.value wt.Path = path))
+        |> fun belongs -> if belongs then Some (RepoHeader collapsedRepoId) else focusedElement
     | other -> other
 
 let adjustFocusForVisibility (repos: RepoModel list) (focusedElement: FocusTarget option) =
diff --git a/src/Server/DemoFixture.fs b/src/Server/DemoFixture.fs
index b2dca6d..7848fcc 100644
--- a/src/Server/DemoFixture.fs
+++ b/src/Server/DemoFixture.fs
@@ -56,6 +56,10 @@ let private withCardEvt branch cardEvt (fix: FixtureData) =
 
 let private azDoEvt = "C:\\code\\CloudPlatform"
 let private githubEvt = "C:\\code\\DataPipeline"
+let private retryKey = WorktreePath.value (azDoPath "feature-retry")
+let private configKey = WorktreePath.value (azDoPath "refactor-config")
+let private authKey = WorktreePath.value (azDoPath "feature-auth")
+let private streamKey = WorktreePath.value (githubPath "streaming")
 
 // --- PRs (retry-logic cycles, others static) ---
 
@@ -312,13 +316,13 @@ let private baseSchedulerEvents: CardEvent list =
 let private retryEvt msg secsAgo = evt "claude" msg secsAgo
 
 let private baseSyncStatus: Map<string, CardEvent list> =
-    [ $"{azDoEvt}/feature/retry-logic",
+    [ retryKey,
       [ retryEvt "Reading BlobStorageClient retry logic" 3 None None ]
-      $"{azDoEvt}/refactor/config-loading",
+      configKey,
       [ evt "claude" "Extracting config validation rules" 8 None None ]
-      $"{azDoEvt}/feature/auth-middleware",
+      authKey,
       [ evt "copilot" "All tests passing" 5 None None ]
-      $"{githubEvt}/feature/streaming-agg",
+      streamKey,
       [ evt "copilot" "Implementing tumbling window support" 5 None None ] ]
     |> Map.ofList
 
@@ -378,7 +382,7 @@ let private f2 =
 let private f3 =
     f2
     |> withAuth (fun wt -> { wt with CodingTool = Working })
-    |> withCardEvt $"{azDoEvt}/feature/auth-middleware"
+    |> withCardEvt authKey
         (evt "copilot" "Reading authorization middleware" 1 None None)
     |> withCpu 45.0 14800
 
@@ -386,14 +390,14 @@ let private f3 =
 let private f4 =
     f3
     |> withRetry (fun wt -> { wt with Pr = HasPr prRetryFailed })
-    |> withCardEvt $"{azDoEvt}/feature/retry-logic"
+    |> withCardEvt retryKey
         (retryEvt "CI build failed — analyzing test results" 1 None None)
     |> withCpu 58.0 15200
 
 // F5 (8-10s): Auth copilot progresses
 let private f5 =
     f4
-    |> withCardEvt $"{azDoEvt}/feature/auth-middleware"
+    |> withCardEvt authKey
         (evt "copilot" "Generating role-based access checks" 1 None None)
     |> withCpu 72.0 16100
 
@@ -404,7 +408,7 @@ let private f6 =
         { wt with
             LastCommitMessage = "Fix flaky retry test timing"
             Pr = HasPr prRetryRebuilding })
-    |> withCardEvt $"{azDoEvt}/feature/retry-logic"
+    |> withCardEvt retryKey
         (retryEvt "Pushed fix, waiting for CI" 1 None None)
     |> withCpu 84.0 17400
 
@@ -421,7 +425,7 @@ let private f7 =
 let private f8 =
     f7
     |> withAuth (fun wt -> { wt with CodingTool = Done })
-    |> withCardEvt $"{azDoEvt}/feature/auth-middleware"
+    |> withCardEvt authKey
         (evt "copilot" "All tests passing" 5 None None)
     |> withCpu 52.0 15800
 
@@ -429,7 +433,7 @@ let private f8 =
 let private f9 =
     f8
     |> withRetry (fun wt -> { wt with Pr = HasPr prRetrySucceeded })
-    |> withCardEvt $"{azDoEvt}/feature/retry-logic"
+    |> withCardEvt retryKey
         (retryEvt "All tests passing — task complete" 1 None None)
     |> withCpu 41.0 15200
 
@@ -447,7 +451,7 @@ let private f11 =
     f10
     |> withRetry (fun wt ->
         { wt with LastUserMessage = Some("add request deduplication", baseTimestamp.AddMinutes(-1.0)) })
-    |> withCardEvt $"{azDoEvt}/feature/retry-logic"
+    |> withCardEvt retryKey
         (retryEvt "Starting next task: request deduplication" 1 None None)
     |> withCpu 39.0 14400
 
diff --git a/src/Server/GitWorktree.fs b/src/Server/GitWorktree.fs
index 4a3f8d4..92de810 100644
--- a/src/Server/GitWorktree.fs
+++ b/src/Server/GitWorktree.fs
@@ -4,8 +4,8 @@ open System
 open System.IO
 open System.Runtime.InteropServices
 open FsToolkit.ErrorHandling
+open Shared
 
-let [<Literal>] DetachedBranchName = "(detached)"
 
 type WorktreeInfo =
     { Path: string
@@ -231,7 +231,7 @@ let collectWorktreeGitData (worktreePath: string) (branch: string option) (mainR
 
         return
             { Path = worktreePath
-              Branch = branch |> Option.defaultValue DetachedBranchName
+              Branch = branch |> Option.defaultValue WorktreeStatus.DetachedBranchName
               LastCommitMessage = commit |> Option.map _.Message |> Option.defaultValue ""
               LastCommitTime = commit |> Option.map _.Time |> Option.defaultValue DateTimeOffset.MinValue
               UpstreamBranch = upstreamBranch
diff --git a/src/Server/WorktreeApi.fs b/src/Server/WorktreeApi.fs
index ec84a32..d609759 100644
--- a/src/Server/WorktreeApi.fs
+++ b/src/Server/WorktreeApi.fs
@@ -64,7 +64,7 @@ let private assembleFromState
     let pr = PrStatus.lookupPrStatus repo.PrData upstreamBranch
 
     { Path = PathUtils.toWorktreePath wt.Path
-      Branch = wt.Branch |> Option.defaultValue GitWorktree.DetachedBranchName
+      Branch = wt.Branch |> Option.defaultValue WorktreeStatus.DetachedBranchName
       LastCommitMessage = gitData |> Option.map (_.LastCommitMessage) |> Option.defaultValue ""
       LastCommitTime = gitData |> Option.map (_.LastCommitTime) |> Option.defaultValue DateTimeOffset.MinValue
       Beads = beads
@@ -423,22 +423,22 @@ let worktreeApi
               async {
                   let! state = agent.PostAndAsyncReply(RefreshScheduler.StateMsg.GetState)
 
-                  let branchToScopedKey =
+                  let syncKeyToPath =
                       state.Repos
                       |> Map.toList
                       |> List.collect (fun (repoId, repo) ->
                           repo.WorktreeList
                           |> List.map (fun wt ->
                               let branch = wt.Branch |> Option.defaultValue (detachedBranchLabel wt.Path)
-                              let key = scopedBranchKey repoId branch
-                              key, wt.Path))
+                              let syncKey = scopedBranchKey repoId branch
+                              syncKey, wt.Path))
                       |> Map.ofList
 
                   let! syncEvents = syncAgent.PostAndAsyncReply(SyncEngine.GetAllEvents)
 
                   let allKeys =
                       [ yield! syncEvents |> Map.keys
-                        yield! branchToScopedKey |> Map.keys ]
+                        yield! syncKeyToPath |> Map.keys ]
                       |> List.distinct
 
                   let cachedLastMessages =
@@ -453,29 +453,31 @@ let worktreeApi
 
                   return
                       allKeys
-                      |> List.choose (fun key ->
+                      |> List.choose (fun syncKey ->
+                          let wtPath = syncKeyToPath |> Map.tryFind syncKey
+
                           let syncEvts =
                               syncEvents
-                              |> Map.tryFind key
+                              |> Map.tryFind syncKey
                               |> Option.defaultValue []
 
                           let claudeEvt =
-                              branchToScopedKey
-                              |> Map.tryFind key
-                              |> Option.bind (fun wtPath -> cachedLastMessages |> Map.tryFind wtPath)
+                              wtPath
+                              |> Option.bind (fun p -> cachedLastMessages |> Map.tryFind p)
 
                           let merged = (claudeEvt |> Option.toList) @ syncEvts
 
-                          match merged with
-                          | [] -> None
-                          | events ->
+                          match merged, wtPath with
+                          | [], _ -> None
+                          | events, Some path ->
                               let recent =
                                   events
                                   |> List.sortByDescending _.Timestamp
                                   |> List.truncate 2
                                   |> List.rev
 
-                              Some(key, recent))
+                              Some(path, recent)
+                          | _, None -> None)
                       |> Map.ofList
               }
           deleteWorktree = deleteWorktree agent rootPaths
diff --git a/src/Shared/Types.fs b/src/Shared/Types.fs
index 380c267..029c268 100644
--- a/src/Shared/Types.fs
+++ b/src/Shared/Types.fs
@@ -15,6 +15,10 @@ type WorktreePath = WorktreePath of string
 module WorktreePath =
     let value (WorktreePath p) = p
 
+    let displayName (WorktreePath p) =
+        let i = max (p.LastIndexOf '/') (p.LastIndexOf '\\')
+        if i < 0 then p else p[i + 1..]
+
 type BranchName = BranchName of string
 
 module BranchName =
@@ -123,6 +127,9 @@ type WorktreeStatus =
       IsMainWorktree: bool
       IsArchived: bool }
 
+module WorktreeStatus =
+    let [<Literal>] DetachedBranchName = "(detached)"
+
 [<RequireQualifiedAccess>]
 type StepStatus =
     | Pending
diff --git a/src/Tests/ArchiveTests.fs b/src/Tests/ArchiveTests.fs
index 88a2e5b..7d8ac53 100644
--- a/src/Tests/ArchiveTests.fs
+++ b/src/Tests/ArchiveTests.fs
@@ -276,10 +276,10 @@ type NavigationArchiveTests() =
                 | Card key -> $"card:{key}")
 
         Assert.That(targetStrings, Does.Contain("header:TestRepo"))
-        Assert.That(targetStrings, Does.Contain("card:TestRepo/main"))
-        Assert.That(targetStrings, Does.Contain("card:TestRepo/feature-x"))
-        Assert.That(targetStrings, Does.Not.Contain("card:TestRepo/old-branch"))
-        Assert.That(targetStrings, Does.Not.Contain("card:TestRepo/stale-feature"))
+        Assert.That(targetStrings, Does.Contain("card:/repo/main"))
+        Assert.That(targetStrings, Does.Contain("card:/repo/feature-x"))
+        Assert.That(targetStrings, Does.Not.Contain("card:/repo/old-branch"))
+        Assert.That(targetStrings, Does.Not.Contain("card:/repo/stale-feature"))
 
     [<Test>]
     member _.``visibleFocusTargets with only archived worktrees shows only header``() =
@@ -303,7 +303,7 @@ type NavigationArchiveTests() =
         let sections = repoNavSections repos
 
         Assert.That(sections.Length, Is.EqualTo(1))
-        Assert.That(sections[0].Cards, Is.EqualTo([ Card "TestRepo/main" ]))
+        Assert.That(sections[0].Cards, Is.EqualTo([ Card "/repo/main" ]))
 
     [<Test>]
     member _.``visibleFocusTargets with collapsed repo containing archived worktrees shows only header``() =
@@ -334,7 +334,7 @@ type NavigationArchiveTests() =
             targets
             |> List.choose (function Card key -> Some key | _ -> None)
 
-        Assert.That(cardKeys, Is.EqualTo([ "Repo1/main"; "Repo2/develop" ]))
+        Assert.That(cardKeys, Is.EqualTo([ "/repo/main"; "/repo/develop" ]))
 
 
 [<TestFixture>]
diff --git a/src/Tests/NavigationTests.fs b/src/Tests/NavigationTests.fs
index dc58b86..6d75ae0 100644
--- a/src/Tests/NavigationTests.fs
+++ b/src/Tests/NavigationTests.fs
@@ -36,7 +36,7 @@ module NavHelpers =
 
     let scrollHint (_, _, hint) = hint
 
-    let cardTarget repoId branch = Card $"{repoId}/{branch}"
+    let cardTarget repoId branch = Card $"/repo/{branch}"
 
 [<TestFixture>]
 [<Category("Unit")>]
diff --git a/src/Tests/fixtures/worktrees.json b/src/Tests/fixtures/worktrees.json
index 0bb1ea9..b42358d 100644
--- a/src/Tests/fixtures/worktrees.json
+++ b/src/Tests/fixtures/worktrees.json
@@ -329,7 +329,7 @@
     "AppVersion": "2026-02-16T22:50:00.000Z"
   },
   "SyncStatus": {
-    "TestProject/feature-active": [
+    "Q:/code/TestProject/feature-active": [
       {
         "Source": "sync",
         "Message": "Merge main",
@@ -345,7 +345,7 @@
         "Duration": null
       }
     ],
-    "TestProject/feature-recent": [
+    "Q:/code/TestProject/feature-recent": [
       {
         "Source": "sync",
         "Message": "Pull",
@@ -361,7 +361,7 @@
         "Duration": null
       }
     ],
-    "TestProject/feature-draft": [
+    "Q:/code/TestProject/feature-draft": [
       {
         "Source": "claude",
         "Message": "Setting up API route handlers",
@@ -379,7 +379,7 @@
         "Duration": null
       }
     ],
-    "TestProject/feature-unknown": [
+    "Q:/code/TestProject/feature-unknown": [
       {
         "Source": "sync",
         "Message": "Check clean",