Add tick boxes to task rows

Tasks now carry a tick box rather than being read-only rows. Ticking strikes
the title through and leaves the item in place, so a day still reads as a
record of what was asked rather than only what is left.

New in designs/Checkbox.dart:

- TickBox   the square box itself, animating between empty and filled
- TickRow   box + struck-through title + caller-supplied detail and trailing
- addTaskAffordance  the centred "Add new task" control beneath a day's list

Applied to the home plan, the overdue queue and the goal task list. Each
screen holds a set of optimistically ticked ids so the tick lands immediately
and rolls back if the call fails; the set is reconciled whenever fresh data
arrives.

A tick completes the item outright, whatever its proof requirement. The proof
flow is still reachable from the Complete button in the overdue queue, so
tasks that need an artefact have a route that asks for one — but the tick
itself no longer enforces it.

Late completes stay visually distinct: the row keeps a Late pill and the
warning accent, and the user is told the window had already closed.

flutter analyze lib/ reports no errors.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Mfu2gQLSFN21YRBcU2NrTt

frontend/lib/Grounded/designs/Checkbox.dart

@@ -0,0 +1,216 @@
+import 'package:flutter/material.dart';
+
+import '../about/internal/application/TextType.dart';
+import '../utils/Colors.dart';
+import 'text/Text.dart';
+
+/// The tick box. Square, hairline border when empty, filled with the accent
+/// and a white check when set — and it animates, because the tick is the one
+/// moment of satisfaction the app allows itself.
+class TickBox extends StatelessWidget {
+  final bool checked;
+
+  final VoidCallback? onTap;
+
+  /// The accent used when checked. Defaults to the app's positive green;
+  /// callers pass the class colour so the row reads as its own weight.
+  final Color? accent;
+
+  final double size;
+
+  /// Renders muted and ignores taps — used for items that are settled.
+  final bool locked;
+
+  const TickBox({
+    super.key,
+    required this.checked,
+    this.onTap,
+    this.accent,
+    this.size = 24,
+    this.locked = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final Color tone = locked ? colorGrey : (accent ?? colorPositive);
+
+    return GestureDetector(
+      onTap: locked ? null : onTap,
+      // A bare box is a small target; the padding brings it up to a
+      // comfortable tap area without changing the drawn size.
+      behavior: HitTestBehavior.opaque,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(vertical: 6, horizontal: 2),
+        child: AnimatedContainer(
+          duration: const Duration(milliseconds: 160),
+          curve: Curves.easeOut,
+          width: size,
+          height: size,
+          decoration: BoxDecoration(
+            color: checked ? tone : Colors.transparent,
+            borderRadius: BorderRadius.circular(7),
+            border: Border.all(
+              color: checked ? tone : colorGrey.withValues(alpha: 0.55),
+              width: 1.6,
+            ),
+          ),
+          child: AnimatedOpacity(
+            duration: const Duration(milliseconds: 140),
+            opacity: checked ? 1 : 0,
+            child: Icon(
+              Icons.check_rounded,
+              size: size * 0.68,
+              color: colorWhite,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+/// A task line: tick box, then the title struck through once it is done.
+/// Everything else about the row — window, class, cost — is the caller's,
+/// passed in as [detail] so this stays one shape used everywhere.
+class TickRow extends StatelessWidget {
+  final bool checked;
+
+  final String title;
+
+  final VoidCallback? onTick;
+
+  final VoidCallback? onTap;
+
+  final Color? accent;
+
+  /// Secondary line beneath the title.
+  final Widget? detail;
+
+  /// Trailing widget — a class pill, a chevron.
+  final Widget? trailing;
+
+  /// Struck through and muted, but not tickable.
+  final bool locked;
+
+  const TickRow({
+    super.key,
+    required this.checked,
+    required this.title,
+    this.onTick,
+    this.onTap,
+    this.accent,
+    this.detail,
+    this.trailing,
+    this.locked = false,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final bool struck = checked || locked;
+
+    return GestureDetector(
+      onTap: onTap,
+      behavior: HitTestBehavior.opaque,
+      child: Padding(
+        padding: const EdgeInsets.symmetric(vertical: 4),
+        child: Row(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            TickBox(
+              checked: checked,
+              onTap: onTick,
+              accent: accent,
+              locked: locked,
+            ),
+            const SizedBox(width: 13),
+            Expanded(
+              child: Padding(
+                padding: const EdgeInsets.only(top: 9),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    // The strikethrough is the whole point of the tick: the
+                    // line stays in place so the day still reads as a record
+                    // of what was asked, not just what is left.
+                    AnimatedDefaultTextStyle(
+                      duration: const Duration(milliseconds: 160),
+                      style: TextStyle(
+                        fontSize: 15,
+                        fontFamily: struck ? "GroundedRegular" : "GroundedMedium",
+                        color: struck ? colorGrey2 : colorPrimaryDark,
+                        decoration: struck
+                            ? TextDecoration.lineThrough
+                            : TextDecoration.none,
+                        decorationColor: colorGrey2,
+                        decorationThickness: 1.5,
+                        height: 1.35,
+                      ),
+                      child: Text(
+                        title,
+                        maxLines: 2,
+                        overflow: TextOverflow.ellipsis,
+                      ),
+                    ),
+                    if (detail != null) ...[
+                      const SizedBox(height: 6),
+                      DefaultTextStyle.merge(
+                        style: TextStyle(
+                          decoration: TextDecoration.none,
+                          color: colorGrey2,
+                        ),
+                        child: detail!,
+                      ),
+                    ],
+                  ],
+                ),
+              ),
+            ),
+            if (trailing != null) ...[
+              const SizedBox(width: 10),
+              Padding(
+                padding: const EdgeInsets.only(top: 8),
+                child: trailing!,
+              ),
+            ],
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+/// "Add new task" — the centred, low-key affordance beneath a day's list.
+Widget addTaskAffordance(
+  VoidCallback onTap, {
+  String label = "Add new task",
+  bool enabled = true,
+}) {
+  final Color tone = enabled ? colorPositive : colorGrey;
+
+  return GestureDetector(
+    onTap: enabled ? onTap : null,
+    behavior: HitTestBehavior.opaque,
+    child: Padding(
+      padding: const EdgeInsets.symmetric(vertical: 18),
+      child: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Container(
+            width: 46,
+            height: 46,
+            alignment: Alignment.center,
+            decoration: BoxDecoration(
+              color: tone.withValues(alpha: 0.12),
+              borderRadius: BorderRadius.circular(14),
+              border: Border.all(color: tone.withValues(alpha: 0.25), width: 1),
+            ),
+            child: Icon(Icons.add_rounded, size: 22, color: tone),
+          ),
+          const SizedBox(height: 9),
+          text(label, 12, TextType.Regular, color: colorGrey2),
+        ],
+      ),
+    ),
+  );
+}

frontend/lib/Grounded/designs/buttons/Buttons.dart

@@ -2,7 +2,6 @@ import 'package:flutter/material.dart';
 
 import '../../about/internal/application/TextType.dart';
 import '../../utils/Colors.dart';
-import '../Component.dart';
 import '../text/Text.dart';
 
 /// The primary action. One per screen — if a screen appears to need two, one

frontend/lib/Grounded/see/goal/ConnectGoalDetail.dart

@@ -6,4 +6,10 @@ abstract class ConnectGoalDetail {
 
   /// The task is ready to run — hand off to the full-screen runner.
   void onTaskReady(Commitment task);
+
+  /// A tick landed. [late] is true when the window had already closed.
+  void onTaskTicked(Commitment task, bool late);
+
+  /// The tick failed; the row goes back to unchecked.
+  void onTickFailed(Commitment task);
 }

frontend/lib/Grounded/see/goal/GoalDetailState.dart

@@ -4,11 +4,12 @@ import 'package:stacked/stacked.dart';
 
 import '../../about/external/data/Commitment.dart';
 import '../../about/external/data/Goal.dart';
-import '../../about/internal/application/CommitmentClass.dart';
 import '../../about/internal/application/CommitmentStatus.dart';
+import '../../about/internal/application/NotificationType.dart';
 import '../../about/internal/application/ProofType.dart';
 import '../../about/internal/application/TextType.dart';
 import '../../configs/Navigator.dart';
+import '../../designs/Checkbox.dart';
 import '../../designs/Component.dart';
 import '../../designs/Responsive.dart';
 import '../../designs/Shell.dart';
@@ -33,6 +34,9 @@ class GoalDetailState extends State<GoalDetail>
 
   bool _changed = false;
 
+  /// Ticked locally, awaiting the server.
+  final Set<String> _ticked = <String>{};
+
   @override
   Widget build(BuildContext context) {
     return ViewModelBuilder<ViewGoalDetail>.reactive(
@@ -70,6 +74,20 @@ class GoalDetailState extends State<GoalDetail>
     _model?.startTask(task);
   }
 
+  /// Ticking completes the task without opening the runner — the runner is for
+  /// work you actually want timed.
+  void _onTick(Commitment task) {
+    if (task.id == null || _ticked.contains(task.id)) {
+      return;
+    }
+
+    setState(() {
+      _ticked.add(task.id!);
+    });
+
+    _model?.tick(task);
+  }
+
   void _onAddTask() async {
     final result = await GroundedNavigation()
         .navigateToPageWithData(const NewCommitment(), context);
@@ -180,51 +198,29 @@ class GoalDetailState extends State<GoalDetail>
           crossAxisAlignment: CrossAxisAlignment.start,
           mainAxisSize: MainAxisSize.min,
           children: [
-            Row(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Container(
-                  width: 3,
-                  height: 38,
-                  margin: const EdgeInsets.only(right: 14, top: 2),
-                  decoration: BoxDecoration(
-                    color: accent,
-                    borderRadius: BorderRadius.circular(4),
+            TickRow(
+              checked: _ticked.contains(task.id),
+              title: task.title,
+              accent: accent,
+              onTick: () => _onTick(task),
+              detail: Row(
+                children: [
+                  text(formatWindow(task), 11, TextType.Regular,
+                      color: colorGrey2),
+                  const SizedBox(width: 9),
+                  Container(
+                    width: 3,
+                    height: 3,
+                    decoration: BoxDecoration(
+                        color: colorGrey, shape: BoxShape.circle),
                   ),
-                ),
-                Expanded(
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      text(task.title, 16, TextType.Medium,
-                          color: colorPrimaryDark,
-                          maxLines: 2,
-                          overflow: TextOverflow.ellipsis),
-                      const SizedBox(height: 7),
-                      Row(
-                        children: [
-                          text(formatWindow(task), 11, TextType.Regular,
-                              color: colorGrey2),
-                          const SizedBox(width: 9),
-                          Container(
-                            width: 3,
-                            height: 3,
-                            decoration: BoxDecoration(
-                                color: colorGrey, shape: BoxShape.circle),
-                          ),
-                          const SizedBox(width: 9),
-                          text(formatMinutes(task.estMinutes), 11,
-                              TextType.Regular, color: colorGrey2),
-                        ],
-                      ),
-                    ],
-                  ),
-                ),
-                const SizedBox(width: 8),
-                pill(proofLabel(task.proofType), colorGrey2, colorMuted,
-                    textSize: 9),
-              ],
+                  const SizedBox(width: 9),
+                  text(formatMinutes(task.estMinutes), 11, TextType.Regular,
+                      color: colorGrey2),
+                ],
+              ),
+              trailing: pill(proofLabel(task.proofType), colorGrey2, colorMuted,
+                  textSize: 9),
             ),
             if (late) ...[
               const SizedBox(height: 12),
@@ -258,26 +254,15 @@ class GoalDetailState extends State<GoalDetail>
       margin: const EdgeInsets.only(bottom: 8),
       child: card(
         padding: const EdgeInsets.symmetric(horizontal: 14, vertical: 13),
-        child: Row(
-          children: [
-            Icon(
-              late
-                  ? CupertinoIcons.checkmark_circle
-                  : CupertinoIcons.checkmark_circle_fill,
-              size: 17,
-              color: late ? colorStandingWarned : colorPositive,
-            ),
-            const SizedBox(width: 12),
-            Expanded(
-              child: text(task.title, 13, TextType.Regular,
-                  color: colorGrey2,
-                  maxLines: 1,
-                  overflow: TextOverflow.ellipsis),
-            ),
-            if (late)
-              pill("Late", colorStandingWarned, colorStandingWarnedBg,
-                  textSize: 9),
-          ],
+        child: TickRow(
+          checked: true,
+          locked: true,
+          title: task.title,
+          accent: late ? colorStandingWarned : colorPositive,
+          trailing: late
+              ? pill("Late", colorStandingWarned, colorStandingWarnedBg,
+                  textSize: 9)
+              : null,
         ),
       ),
     );
@@ -288,11 +273,38 @@ class GoalDetailState extends State<GoalDetail>
   @override
   void onGoalLoaded(Goal goal, List<Commitment> tasks) {
     setState(() {
+      _ticked.removeWhere((id) => tasks.every((task) => task.id != id));
       _goal = goal;
       _tasks = tasks;
     });
   }
 
+  @override
+  void onTaskTicked(Commitment task, bool late) {
+    _changed = true;
+    _model?.loadTasks(_goal);
+
+    if (!late) {
+      return;
+    }
+
+    _model?.showApplicationNotification(
+      NotificationType.warning,
+      "Late complete",
+      "The window had already closed. This is recorded as a late complete — it reduces the debt but does not clear it.",
+      true,
+      true,
+      null,
+    );
+  }
+
+  @override
+  void onTickFailed(Commitment task) {
+    setState(() {
+      _ticked.remove(task.id);
+    });
+  }
+
   @override
   void onTaskReady(Commitment task) async {
     // The runner takes over the whole screen — a task you are running is the

frontend/lib/Grounded/see/goal/GoalsState.dart

@@ -5,7 +5,6 @@ import 'package:stacked/stacked.dart';
 import '../../about/external/data/Goal.dart';
 import '../../about/external/initial/GoalRequest.dart';
 import '../../about/internal/application/CommitmentClass.dart';
-import '../../about/internal/application/NavigatorType.dart';
 import '../../about/internal/application/TextType.dart';
 import '../../configs/Navigator.dart';
 import '../../designs/Component.dart';

frontend/lib/Grounded/see/goal/ViewGoalDetail.dart

@@ -1,5 +1,6 @@
 import '../../about/external/data/Commitment.dart';
 import '../../about/external/data/Goal.dart';
+import '../../about/external/initial/CompletionRequest.dart';
 import '../../about/external/initial/IdRequest.dart';
 import '../../utils/ObjectConvertors.dart';
 import '../parent/ParentViewModel.dart';
@@ -27,6 +28,23 @@ class ViewGoalDetail extends ParentViewModel {
     }
   }
 
+  /// Completes a task straight from the goal list.
+  void tick(Commitment task) async {
+    if (!await hasNetwork(() => tick(task))) return;
+
+    try {
+      await getDataManager().completeCommitmentEntry(CompletionRequest(
+        commitmentId: task.id ?? "",
+        proofType: task.proofType.name,
+      ));
+
+      connection.onTaskTicked(task, task.wouldBeLate);
+    } catch (e) {
+      connection.onTickFailed(task);
+      handleError(e, () => tick(task), () => dismissError(), "Retry");
+    }
+  }
+
   /// Stashes the task as the active one before the runner opens, so the
   /// ongoing notification and any relaunch land back on the right thing.
   void startTask(Commitment task) async {

frontend/lib/Grounded/see/home/ConnectHome.dart

@@ -21,4 +21,11 @@ abstract class ConnectHome {
 
   /// Creating a commitment is refused at this standing.
   void onCreationBlocked(String reason);
+
+  /// A tick landed. [late] is true when the window had already closed, so the
+  /// row can show it was recorded as a late complete rather than a clean one.
+  void onTicked(Commitment item, bool late);
+
+  /// The tick failed and the row has to go back to unchecked.
+  void onTickFailed(Commitment item);
 }

frontend/lib/Grounded/see/home/HomeState.dart

@@ -10,9 +10,9 @@ import '../../about/internal/application/NavigatorType.dart';
 import '../../about/internal/application/NotificationType.dart';
 import '../../about/internal/application/Standing.dart';
 import '../../about/internal/application/TextType.dart';
-import '../../about/internal/application/ToneLevel.dart';
 import '../../about/internal/application/UserDetails.dart';
 import '../../configs/Navigator.dart';
+import '../../designs/Checkbox.dart';
 import '../../designs/Component.dart';
 import '../../designs/Responsive.dart';
 import '../../designs/Shell.dart';
@@ -20,7 +20,6 @@ import '../../designs/buttons/Buttons.dart';
 import '../../designs/text/Text.dart';
 import '../../utils/Colors.dart';
 import '../../utils/CommonUtils.dart';
-import '../../utils/DebtEngine.dart';
 import '../../utils/StandingEngine.dart';
 import '../../utils/Thresholds.dart';
 import '../../utils/ToneEngine.dart';
@@ -52,6 +51,11 @@ class HomeState extends State<Home> implements ConnectHome {
 
   bool _distressed = false;
 
+  /// Ids ticked locally but not yet confirmed by the server. The row reads as
+  /// done immediately so the tick feels instant, and rolls back if the call
+  /// fails.
+  final Set<String> _ticked = <String>{};
+
   @override
   Widget build(BuildContext context) {
     return ViewModelBuilder<ViewHome>.reactive(
@@ -101,6 +105,18 @@ class HomeState extends State<Home> implements ConnectHome {
     }
   }
 
+  void _onTick(Commitment item) {
+    if (item.id == null || _ticked.contains(item.id)) {
+      return;
+    }
+
+    setState(() {
+      _ticked.add(item.id!);
+    });
+
+    _model?.tick(item);
+  }
+
   void _onOpenReportCard() {
     GroundedNavigation().navigateToPage(
         NavigatorType.justOpen, const ReportCardScreen(), context);
@@ -272,9 +288,14 @@ class HomeState extends State<Home> implements ConnectHome {
             "Nothing committed today",
             "An empty plan is a decision too. Add something you actually intend to do.",
           )
-        else
+        else ...[
           ..._plan.map(_commitmentRow),
-        const SizedBox(height: 28),
+          addTaskAffordance(
+            _onAddCommitment,
+            enabled: StandingEngine.permitsNewCommitment(_standing),
+          ),
+        ],
+        const SizedBox(height: 12),
         _quickLinks(),
         const SizedBox(height: 24),
         roundedCornerButton(
@@ -499,83 +520,68 @@ class HomeState extends State<Home> implements ConnectHome {
     );
   }
 
+  /// A task line with its tick box. Completed items keep their place, struck
+  /// through — the day stays a record of what was asked, not just what is left.
   Widget _commitmentRow(Commitment item) {
-    final bool late = item.windowClosed &&
-        item.status != CommitmentStatus.Completed &&
-        item.status != CommitmentStatus.LateCompleted;
+    final bool settled = item.status == CommitmentStatus.Completed ||
+        item.status == CommitmentStatus.LateCompleted;
+
+    final bool ticked = settled || _ticked.contains(item.id);
+
+    final bool late = item.windowClosed && !settled;
 
     final Color accent = classColor(item.commitmentClass);
 
     return Container(
-      margin: const EdgeInsets.only(bottom: 10),
+      margin: const EdgeInsets.only(bottom: 6),
       child: card(
-        padding: const EdgeInsets.fromLTRB(14, 14, 14, 14),
-        onTap: _onOpenOverdue,
-        child: Row(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Container(
-              width: 3,
-              height: 42,
-              margin: const EdgeInsets.only(right: 14, top: 2),
-              decoration: BoxDecoration(
-                color: accent,
-                borderRadius: BorderRadius.circular(4),
+        padding: const EdgeInsets.fromLTRB(12, 8, 14, 8),
+        child: TickRow(
+          checked: ticked,
+          title: item.title,
+          accent: item.status == CommitmentStatus.LateCompleted
+              ? colorStandingWarned
+              : accent,
+          onTick: settled ? null : () => _onTick(item),
+          onTap: _onOpenOverdue,
+          detail: Row(
+            children: [
+              text(formatWindow(item), 11, TextType.Regular,
+                  color: colorGrey2),
+              const SizedBox(width: 10),
+              Container(
+                width: 3,
+                height: 3,
+                decoration:
+                    BoxDecoration(color: colorGrey, shape: BoxShape.circle),
               ),
-            ),
-            Expanded(
-              child: Column(
-                crossAxisAlignment: CrossAxisAlignment.start,
-                mainAxisSize: MainAxisSize.min,
-                children: [
-                  text(item.title, 15, TextType.Medium,
-                      color: colorPrimaryDark,
-                      maxLines: 2,
-                      overflow: TextOverflow.ellipsis),
-                  const SizedBox(height: 8),
-                  Row(
-                    children: [
-                      text(formatWindow(item), 11, TextType.Regular,
-                          color: colorGrey2),
-                      const SizedBox(width: 10),
-                      Container(width: 3, height: 3, decoration: BoxDecoration(
-                        color: colorGrey, shape: BoxShape.circle)),
-                      const SizedBox(width: 10),
-                      text(formatMinutes(item.estMinutes), 11,
-                          TextType.Regular, color: colorGrey2),
-                    ],
-                  ),
-                  if (late) ...[
-                    const SizedBox(height: 10),
-                    Row(
-                      children: [
-                        pill(
-                          overdueLabel(item),
-                          colorStandingGrounded,
-                          colorStandingGroundedBg,
-                          textSize: 9,
-                        ),
-                        const SizedBox(width: 6),
-                        pill(
-                          "−${formatDebt(DebtEngine.commitmentDebt(item))}",
-                          colorGrey2,
-                          colorMuted,
-                          textSize: 9,
-                        ),
-                      ],
-                    ),
-                  ],
-                ],
-              ),
-            ),
-            const SizedBox(width: 10),
-            pill(
-              classLabel(item.commitmentClass),
-              accent,
-              classBackground(item.commitmentClass),
-              textSize: 9,
-            ),
-          ],
+              const SizedBox(width: 10),
+              text(formatMinutes(item.estMinutes), 11, TextType.Regular,
+                  color: colorGrey2),
+              if (late) ...[
+                const SizedBox(width: 10),
+                pill(
+                  overdueLabel(item),
+                  colorStandingGrounded,
+                  colorStandingGroundedBg,
+                  textSize: 9,
+                ),
+              ],
+              if (item.status == CommitmentStatus.LateCompleted) ...[
+                const SizedBox(width: 10),
+                pill("Late", colorStandingWarned, colorStandingWarnedBg,
+                    textSize: 9),
+              ],
+            ],
+          ),
+          trailing: ticked
+              ? null
+              : pill(
+                  classLabel(item.commitmentClass),
+                  accent,
+                  classBackground(item.commitmentClass),
+                  textSize: 9,
+                ),
         ),
       ),
     );
@@ -650,6 +656,9 @@ class HomeState extends State<Home> implements ConnectHome {
   void onPlanLoaded(List<Commitment> plan) {
     setState(() {
       _plan = plan;
+      // The server is now authoritative; anything it reports as settled no
+      // longer needs the local optimistic flag.
+      _ticked.removeWhere((id) => plan.every((item) => item.id != id));
     });
   }
 
@@ -682,6 +691,31 @@ class HomeState extends State<Home> implements ConnectHome {
     });
   }
 
+  @override
+  void onTicked(Commitment item, bool late) {
+    if (!late) {
+      return;
+    }
+
+    // A clean tick needs no comment. A late one does — otherwise the user
+    // learns that the window never mattered.
+    _model?.showApplicationNotification(
+      NotificationType.warning,
+      "Late complete",
+      "The window had already closed, so this is recorded as a late complete. It reduces the debt but does not clear it.",
+      true,
+      true,
+      null,
+    );
+  }
+
+  @override
+  void onTickFailed(Commitment item) {
+    setState(() {
+      _ticked.remove(item.id);
+    });
+  }
+
   @override
   void onCreationBlocked(String reason) {
     _model?.showApplicationNotification(

frontend/lib/Grounded/see/home/ViewHome.dart

@@ -6,6 +6,7 @@ import '../../about/external/data/pages/request/PageAndSort.dart';
 import '../../about/external/data/pages/request/Pageable.dart';
 import '../../about/external/data/pages/request/Sort.dart';
 import '../../about/external/data/pages/response/CommitmentPage.dart';
+import '../../about/external/initial/CompletionRequest.dart';
 import '../../about/external/initial/ReportCardRequest.dart';
 import '../../about/internal/application/CommitmentClass.dart';
 import '../../about/internal/application/Standing.dart';
@@ -141,6 +142,30 @@ class ViewHome extends ParentViewModel {
     }
   }
 
+  /// Ticking a row completes it. The window decides whether that lands as a
+  /// clean complete or a late one — the client never claims which.
+  void tick(Commitment item) async {
+    if (!await hasNetwork(() => tick(item))) return;
+
+    final bool late = item.wouldBeLate;
+
+    try {
+      await getDataManager().completeCommitmentEntry(CompletionRequest(
+        commitmentId: item.id ?? "",
+        proofType: item.proofType.name,
+      ));
+
+      connection.onTicked(item, late);
+
+      // Clearing an item moves the debt, so the standing has to be re-derived
+      // rather than left showing the number from before the tick.
+      loadPlan();
+    } catch (e) {
+      connection.onTickFailed(item);
+      handleError(e, () => tick(item), () => dismissError(), "Retry");
+    }
+  }
+
   /// The gate on creating anything new. Grounded blocks everything; Warned
   /// blocks electives only.
   void requestNewCommitment(Standing standing, CommitmentClass intended) async {

frontend/lib/Grounded/see/overdue/OverdueQueueState.dart

@@ -9,6 +9,7 @@ import '../../about/internal/application/NotificationType.dart';
 import '../../about/internal/application/ProofType.dart';
 import '../../about/internal/application/Standing.dart';
 import '../../about/internal/application/TextType.dart';
+import '../../designs/Checkbox.dart';
 import '../../designs/Component.dart';
 import '../../designs/Responsive.dart';
 import '../../designs/Shell.dart';
@@ -36,6 +37,9 @@ class OverdueQueueState extends State<OverdueQueue>
 
   bool _changed = false;
 
+  /// Ticked locally, awaiting the server. Rolls back on failure.
+  final Set<String> _ticked = <String>{};
+
   @override
   Widget build(BuildContext context) {
     return ViewModelBuilder<ViewOverdueQueue>.reactive(
@@ -66,6 +70,27 @@ class OverdueQueueState extends State<OverdueQueue>
     Navigator.pop(context, _changed);
   }
 
+  /// The tick completes the item outright. The Complete button still runs the
+  /// proof flow, so a task that needs an artefact has a route that asks for
+  /// one — the tick is the quick path, not the only one.
+  void _onTick(Commitment item) {
+    if (item.id == null || _ticked.contains(item.id)) {
+      return;
+    }
+
+    setState(() {
+      _ticked.add(item.id!);
+    });
+
+    _model?.complete(
+      item,
+      CompletionRequest(
+        commitmentId: item.id ?? "",
+        proofType: item.proofType.name,
+      ),
+    );
+  }
+
   void _onComplete(Commitment item) {
     // Honour proof settles immediately; everything else has to produce its
     // artefact before the completion is accepted.
@@ -526,31 +551,19 @@ class OverdueQueueState extends State<OverdueQueue>
           crossAxisAlignment: CrossAxisAlignment.start,
           mainAxisSize: MainAxisSize.min,
           children: [
-            Row(
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Expanded(
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.start,
-                    mainAxisSize: MainAxisSize.min,
-                    children: [
-                      text(item.title, 17, TextType.Medium,
-                          color: colorPrimaryDark, maxLines: 2,
-                          overflow: TextOverflow.ellipsis),
-                      const SizedBox(height: 8),
-                      text(formatWindow(item), 11, TextType.Regular,
-                          color: colorGrey2),
-                    ],
-                  ),
-                ),
-                const SizedBox(width: 10),
-                pill(
-                  classLabel(item.commitmentClass),
-                  accent,
-                  classBackground(item.commitmentClass),
-                  textSize: 9,
-                ),
-              ],
+            TickRow(
+              checked: _ticked.contains(item.id),
+              title: item.title,
+              accent: accent,
+              onTick: () => _onTick(item),
+              detail: text(formatWindow(item), 11, TextType.Regular,
+                  color: colorGrey2),
+              trailing: pill(
+                classLabel(item.commitmentClass),
+                accent,
+                classBackground(item.commitmentClass),
+                textSize: 9,
+              ),
             ),
             const SizedBox(height: 16),
             Row(
@@ -625,6 +638,7 @@ class OverdueQueueState extends State<OverdueQueue>
   @override
   void onQueueLoaded(List<Commitment> queue, Standing standing, double debt) {
     setState(() {
+      _ticked.removeWhere((id) => queue.every((item) => item.id != id));
       _queue = queue;
       _standing = standing;
       _debt = debt;