feat(timer): wire VisualTimer to tasks with notifications and persistence

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -12,6 +12,7 @@
         "@tauri-apps/api": "^2",
         "@tauri-apps/plugin-dialog": "^2.6.0",
         "@tauri-apps/plugin-global-shortcut": "^2.3.1",
+        "@tauri-apps/plugin-notification": "^2.3.3",
         "@tauri-apps/plugin-opener": "^2",
         "lucide-svelte": "^0.577.0"
       },
@@ -1563,6 +1564,15 @@
         "@tauri-apps/api": "^2.8.0"
       }
     },
+    "node_modules/@tauri-apps/plugin-notification": {
+      "version": "2.3.3",
+      "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-notification/-/plugin-notification-2.3.3.tgz",
+      "integrity": "sha512-Zw+ZH18RJb41G4NrfHgIuofJiymusqN+q8fGUIIV7vyCH+5sSn5coqRv/MWB9qETsUs97vmU045q7OyseCV3Qg==",
+      "license": "MIT OR Apache-2.0",
+      "dependencies": {
+        "@tauri-apps/api": "^2.8.0"
+      }
+    },
     "node_modules/@tauri-apps/plugin-opener": {
       "version": "2.5.3",
       "resolved": "https://registry.npmjs.org/@tauri-apps/plugin-opener/-/plugin-opener-2.5.3.tgz",

package.json

@@ -16,6 +16,7 @@
     "@tauri-apps/api": "^2",
     "@tauri-apps/plugin-dialog": "^2.6.0",
     "@tauri-apps/plugin-global-shortcut": "^2.3.1",
+    "@tauri-apps/plugin-notification": "^2.3.3",
     "@tauri-apps/plugin-opener": "^2",
     "lucide-svelte": "^0.577.0"
   },

src-tauri/Cargo.toml

@@ -26,6 +26,7 @@ tauri = { version = "2", features = ["tray-icon"] }
 tauri-plugin-opener = "2"
 tauri-plugin-dialog = "2"
 tauri-plugin-global-shortcut = "2"
+tauri-plugin-notification = "2"
 
 # Serialisation
 serde = { version = "1", features = ["derive"] }

src-tauri/capabilities/default.json

@@ -17,6 +17,7 @@
     "opener:default",
     "dialog:default",
     "global-shortcut:allow-register",
-    "global-shortcut:allow-unregister"
+    "global-shortcut:allow-unregister",
+    "notification:default"
   ]
 }

src-tauri/src/commands/mod.rs

@@ -4,5 +4,6 @@ pub mod hardware;
 pub mod history;
 pub mod models;
 pub mod tasks;
+pub mod timer;
 pub mod transcription;
 pub mod windows;

src-tauri/src/commands/timer.rs

@@ -0,0 +1,56 @@
+use serde::Serialize;
+
+use crate::AppState;
+use kon_storage::{clear_timer_state, get_timer_state, save_timer_state};
+
+/// Serialisable timer state response.
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct TimerStateResponse {
+    pub task_id: String,
+    pub total_seconds: i64,
+    pub remaining_seconds: i64,
+    pub started_at: String,
+    pub paused: bool,
+}
+
+/// Save or update the active timer state.
+#[tauri::command]
+pub async fn save_timer(
+    state: tauri::State<'_, AppState>,
+    task_id: String,
+    total_seconds: i64,
+    remaining_seconds: i64,
+    paused: bool,
+) -> Result<(), String> {
+    save_timer_state(&state.db, &task_id, total_seconds, remaining_seconds, paused)
+        .await
+        .map_err(|e| e.to_string())
+}
+
+/// Retrieve the active timer state (for context restoration on app restart).
+#[tauri::command]
+pub async fn get_timer(
+    state: tauri::State<'_, AppState>,
+) -> Result<Option<TimerStateResponse>, String> {
+    let row = get_timer_state(&state.db)
+        .await
+        .map_err(|e| e.to_string())?;
+    Ok(row.map(|r| TimerStateResponse {
+        task_id: r.task_id,
+        total_seconds: r.total_seconds,
+        remaining_seconds: r.remaining_seconds,
+        started_at: r.started_at,
+        paused: r.paused,
+    }))
+}
+
+/// Clear the active timer (completed or cancelled).
+#[tauri::command]
+pub async fn clear_timer(
+    state: tauri::State<'_, AppState>,
+) -> Result<(), String> {
+    clear_timer_state(&state.db)
+        .await
+        .map_err(|e| e.to_string())
+}

src-tauri/src/lib.rs

@@ -72,6 +72,7 @@ pub fn run() {
         .plugin(tauri_plugin_opener::init())
         .plugin(tauri_plugin_dialog::init())
         .plugin(tauri_plugin_global_shortcut::Builder::new().build())
+        .plugin(tauri_plugin_notification::init())
         .setup(|app| {
             // Initialise database (blocking in setup — runs once at startup)
             let db_path = database_path();
@@ -154,6 +155,10 @@ pub fn run() {
             commands::tasks::reorder_tasks_cmd,
             commands::tasks::complete_task_cmd,
             commands::tasks::uncomplete_task_cmd,
+            // Timer
+            commands::timer::save_timer,
+            commands::timer::get_timer,
+            commands::timer::clear_timer,
             // Transcription
             commands::transcription::transcribe_pcm,
             commands::transcription::transcribe_file,

src/lib/components/TaskTimer.svelte

@@ -0,0 +1,242 @@
+<script>
+  import { onMount, onDestroy } from 'svelte';
+  import { invoke } from '@tauri-apps/api/core';
+  import VisualTimer from './VisualTimer.svelte';
+  import { getPreferences } from '$lib/stores/preferences.svelte.js';
+  import { Play, Pause, X, Timer } from 'lucide-svelte';
+
+  const prefs = getPreferences();
+
+  // Timer state
+  let taskId = $state(null);
+  let taskText = $state('');
+  let totalSeconds = $state(0);
+  let remainingSeconds = $state(0);
+  let running = $state(false);
+  let paused = $state(false);
+  let intervalId = null;
+  let persistDebounce = null;
+
+  // Reduce motion check
+  let reduceMotion = $derived(
+    prefs.accessibility?.reduceMotion === 'on'
+    || (prefs.accessibility?.reduceMotion === 'system'
+      && typeof window !== 'undefined'
+      && window.matchMedia('(prefers-reduced-motion: reduce)').matches)
+  );
+
+  // Formatted time display
+  let minutes = $derived(Math.floor(remainingSeconds / 60));
+  let seconds = $derived(remainingSeconds % 60);
+  let timeDisplay = $derived(
+    `${String(minutes).padStart(2, '0')}:${String(seconds).padStart(2, '0')}`
+  );
+
+  // Context restoration — check for active timer on mount
+  onMount(async () => {
+    try {
+      const saved = await invoke('get_timer');
+      if (saved) {
+        taskId = saved.taskId;
+        totalSeconds = saved.totalSeconds;
+        remainingSeconds = saved.remainingSeconds;
+        paused = saved.paused;
+        running = true;
+        if (!paused) {
+          startInterval();
+        }
+      }
+    } catch (e) {
+      console.error('Failed to restore timer state:', e);
+    }
+  });
+
+  onDestroy(() => {
+    clearInterval(intervalId);
+    clearTimeout(persistDebounce);
+  });
+
+  /**
+   * Start a timer for a task.
+   * @param {string} id - Task ID
+   * @param {string} text - Task text (for display and notification)
+   * @param {number} durationSeconds - Timer duration (default 120 = 2 minutes)
+   */
+  export function startTimer(id, text, durationSeconds = 120) {
+    // Only one timer at a time
+    if (running) stopTimer();
+
+    taskId = id;
+    taskText = text;
+    totalSeconds = durationSeconds;
+    remainingSeconds = durationSeconds;
+    running = true;
+    paused = false;
+
+    persistState();
+    startInterval();
+  }
+
+  function startInterval() {
+    clearInterval(intervalId);
+    intervalId = setInterval(tick, 1000);
+  }
+
+  function tick() {
+    if (remainingSeconds <= 0) {
+      onComplete();
+      return;
+    }
+    remainingSeconds--;
+
+    // Persist every 5 seconds (debounced)
+    clearTimeout(persistDebounce);
+    if (remainingSeconds % 5 === 0) {
+      persistState();
+    }
+  }
+
+  function togglePause() {
+    if (paused) {
+      // Resume
+      paused = false;
+      startInterval();
+    } else {
+      // Pause
+      paused = true;
+      clearInterval(intervalId);
+    }
+    persistState();
+  }
+
+  function stopTimer() {
+    clearInterval(intervalId);
+    clearTimeout(persistDebounce);
+    running = false;
+    paused = false;
+    taskId = null;
+    taskText = '';
+    totalSeconds = 0;
+    remainingSeconds = 0;
+    clearState();
+  }
+
+  async function onComplete() {
+    clearInterval(intervalId);
+
+    // Play gentle chime via Web Audio API
+    playChime();
+
+    // Send OS notification
+    try {
+      const { isPermissionGranted, requestPermission, sendNotification } =
+        await import('@tauri-apps/plugin-notification');
+      let granted = await isPermissionGranted();
+      if (!granted) {
+        const result = await requestPermission();
+        granted = result === 'granted';
+      }
+      if (granted) {
+        sendNotification({
+          title: 'Timer complete',
+          body: taskText || 'Your focus session is done — well done.',
+        });
+      }
+    } catch (e) {
+      console.error('Notification failed:', e);
+    }
+
+    // Clean up state
+    running = false;
+    paused = false;
+    clearState();
+  }
+
+  function playChime() {
+    try {
+      const ctx = new AudioContext();
+      const osc = ctx.createOscillator();
+      const gain = ctx.createGain();
+      osc.type = 'sine';
+      osc.frequency.setValueAtTime(523.25, ctx.currentTime); // C5
+      osc.frequency.setValueAtTime(659.25, ctx.currentTime + 0.15); // E5
+      osc.frequency.setValueAtTime(783.99, ctx.currentTime + 0.3); // G5
+      gain.gain.setValueAtTime(0.15, ctx.currentTime);
+      gain.gain.exponentialRampToValueAtTime(0.001, ctx.currentTime + 0.8);
+      osc.connect(gain);
+      gain.connect(ctx.destination);
+      osc.start();
+      osc.stop(ctx.currentTime + 0.8);
+    } catch {
+      // Web Audio not available — silent fallback
+    }
+  }
+
+  async function persistState() {
+    try {
+      await invoke('save_timer', {
+        taskId: taskId,
+        totalSeconds: totalSeconds,
+        remainingSeconds: remainingSeconds,
+        paused: paused,
+      });
+    } catch (e) {
+      console.error('Failed to persist timer state:', e);
+    }
+  }
+
+  async function clearState() {
+    try {
+      await invoke('clear_timer');
+    } catch (e) {
+      console.error('Failed to clear timer state:', e);
+    }
+  }
+</script>
+
+{#if running}
+  <div class="flex items-center gap-3 px-4 py-3 rounded-xl bg-bg-elevated border border-border-subtle animate-fade-in">
+    <!-- Timer ring or static display -->
+    {#if reduceMotion}
+      <!-- Static fill state for reduce-motion -->
+      <div class="flex items-center justify-center w-12 h-12 rounded-full border-3 border-accent"
+        style="background: conic-gradient(var(--color-accent) {(1 - remainingSeconds / totalSeconds) * 360}deg, transparent 0deg);">
+        <div class="w-10 h-10 rounded-full bg-bg-elevated"></div>
+      </div>
+    {:else}
+      <VisualTimer {totalSeconds} {remainingSeconds} size={48} />
+    {/if}
+
+    <!-- Time + task info -->
+    <div class="flex-1 min-w-0">
+      <p class="text-[16px] font-medium text-text tabular-nums tracking-tight">{timeDisplay}</p>
+      {#if taskText}
+        <p class="text-[11px] text-text-tertiary truncate">{taskText}</p>
+      {/if}
+    </div>
+
+    <!-- Controls -->
+    <div class="flex items-center gap-1">
+      <button
+        class="w-8 h-8 rounded-lg flex items-center justify-center text-text-secondary hover:bg-hover hover:text-text"
+        style="transition-duration: var(--duration-ui)"
+        onclick={togglePause}
+        aria-label={paused ? 'Resume timer' : 'Pause timer'}
+      >
+        {#if paused}
+          <Play size={16} aria-hidden="true" />
+        {:else}
+          <Pause size={16} aria-hidden="true" />
+        {/if}
+      </button>
+      <button
+        class="w-8 h-8 rounded-lg flex items-center justify-center text-text-secondary hover:bg-hover hover:text-danger"
+        style="transition-duration: var(--duration-ui)"
+        onclick={stopTimer}
+        aria-label="Stop timer"
+      >
+        <X size={16} aria-hidden="true" />
+      </button>
+    </div>
+  </div>
+{/if}

src/lib/components/WipTaskList.svelte

@@ -1,7 +1,13 @@
 <script>
   import { getTasks, createTask, completeTask, deleteTask } from '$lib/stores/tasks.svelte.js';
   const tasks = getTasks();
-  import { ChevronDown } from 'lucide-svelte';
+  import { ChevronDown, Timer } from 'lucide-svelte';
+
+  function startTimer(task, duration = 120) {
+    window.dispatchEvent(new CustomEvent('kon:start-timer', {
+      detail: { id: task.id, text: task.text, duration }
+    }));
+  }
 
   let { wipLimit = 3 } = $props();
 
@@ -55,6 +61,15 @@
           >
           </button>
           <span class="text-[13px] text-text flex-1 min-w-0 truncate">{task.text}</span>
+          <button
+            class="text-text-tertiary hover:text-accent opacity-0 group-hover:opacity-100"
+            style="transition: opacity var(--duration-ui)"
+            onclick={() => startTimer(task)}
+            aria-label="Start 2-minute timer"
+            title="Just start — 2 minutes"
+          >
+            <Timer size={14} aria-hidden="true" />
+          </button>
           <button
             class="text-text-tertiary hover:text-danger opacity-0 group-hover:opacity-100 text-[11px]"
             onclick={() => deleteTask(task.id)}

src/lib/pages/TasksPage.svelte

@@ -13,7 +13,13 @@
   onMount(() => { loadTasks(); });
   import WipTaskList from '$lib/components/WipTaskList.svelte';
   import EmptyState from '$lib/components/EmptyState.svelte';
-  import { SquareCheck, Search, ExternalLink, ChevronLeft, ArrowUpDown, Plus, X, ChevronRight } from 'lucide-svelte';
+  import { SquareCheck, Search, ExternalLink, ChevronLeft, ArrowUpDown, Plus, X, ChevronRight, Timer } from 'lucide-svelte';
+
+  function startTimer(task, duration = 120) {
+    window.dispatchEvent(new CustomEvent('kon:start-timer', {
+      detail: { id: task.id, text: task.text, duration }
+    }));
+  }
   import Card from "$lib/components/Card.svelte";
   import { formatTimestamp } from "$lib/utils/time.js";
   import { BUCKET_COLORS, EFFORT_LABELS, EFFORT_ORDER } from "$lib/utils/constants.js";
@@ -440,6 +446,17 @@
                 {/if}
               </div>
 
+              <!-- Timer -->
+              <button
+                aria-label="Start 2-minute timer"
+                title="Just start — 2 minutes"
+                class="mt-0.5 text-text-tertiary hover:text-accent opacity-0 group-hover:opacity-100 focus:opacity-100"
+                style="transition: opacity var(--duration-ui)"
+                onclick={() => startTimer(task)}
+              >
+                <Timer size={16} aria-hidden="true" />
+              </button>
+
               <!-- Delete -->
               <button
                 aria-label="Delete task"

src/routes/+layout.svelte

@@ -5,6 +5,7 @@
   import Sidebar from "$lib/Sidebar.svelte";
   import TaskSidebar from "$lib/components/TaskSidebar.svelte";
   import Titlebar from "$lib/components/Titlebar.svelte";
+  import TaskTimer from "$lib/components/TaskTimer.svelte";
   import { page, settings, saveSettings } from "$lib/stores/page.svelte.js";
   import { getPreferences, updatePreferences } from "$lib/stores/preferences.svelte.js";
 
@@ -14,6 +15,16 @@
 
   const prefs = getPreferences();
 
+  // Task timer — bound component for cross-page timer control
+  let taskTimer = $state(null);
+
+  function handleStartTimer(e) {
+    if (taskTimer) {
+      const { id, text, duration } = e.detail;
+      taskTimer.startTimer(id, text, duration || 120);
+    }
+  }
+
   // Detect secondary windows (float, viewer) — they use +layout@.svelte
   // but as a fallback, hide chrome if the URL matches
   let isSecondaryWindow = $derived(
@@ -99,6 +110,7 @@
     // Auto-collapse if window is already narrow on first load
     handleResize();
     window.addEventListener("resize", handleResize);
+    window.addEventListener("kon:start-timer", handleStartTimer);
 
     try {
       const whisper = await invoke("list_models");
@@ -113,6 +125,7 @@
 
   onDestroy(() => {
     window.removeEventListener("resize", handleResize);
+    window.removeEventListener("kon:start-timer", handleStartTimer);
     if (registeredHotkey) {
       import("@tauri-apps/plugin-global-shortcut")
         .then((mod) => mod.unregister(registeredHotkey))
@@ -140,8 +153,12 @@
       {#if page.current !== "first-run"}
         <Sidebar />
       {/if}
-      <div class="flex-1 overflow-hidden bg-bg">
+      <div class="flex-1 overflow-hidden bg-bg flex flex-col">
-        {@render children()}
+        <!-- Active timer (persists across page navigation) -->
+        <TaskTimer bind:this={taskTimer} />
+        <div class="flex-1 overflow-hidden">
+          {@render children()}
+        </div>
       </div>
     </div>
   </div>