feat: Implement core frontend application with task management, user selection, and a collapsible sidebar.

Provider/frontend/src/App.svelte

@@ -144,7 +144,7 @@
     <div class="w-full max-w-6xl mx-auto space-y-8">
       <!-- Header -->
       <div class="text-center">
-        <h1 class="text-2xl font-bold text-accent">Calendink Provider 🚀🚀👑</h1>
+        <h1 class="text-2xl font-bold text-accent">Calendink Provider 🚀👑🥸</h1>
         <p class="text-text-secondary text-sm">ESP32-S3 System Dashboard v{__APP_VERSION__}</p>
         
         <!-- Status Badge -->
@@ -175,6 +175,39 @@
 
       {#if currentView === 'dashboard'}
         <!-- Dashboard View -->
+
+        <!-- Upcoming Tasks Section (top priority) -->
+        {#if upcomingData.users.length > 0}
+          <div class="bg-bg-card border border-border rounded-xl overflow-hidden shadow-xl">
+            <div class="px-5 py-3 border-b border-border">
+              <h2 class="text-sm font-semibold text-text-primary uppercase tracking-wider">
+                📋 Upcoming Tasks
+              </h2>
+            </div>
+            <div class="grid grid-cols-1 md:grid-cols-3 gap-0 divide-y md:divide-y-0 md:divide-x divide-border">
+              {#each upcomingData.users as user}
+                <div class="p-4">
+                  <h3 class="text-xs font-bold text-accent mb-3 uppercase tracking-wider">{user.name}</h3>
+                  {#if user.tasks.length === 0}
+                    <p class="text-[11px] text-text-secondary italic">No pending tasks</p>
+                  {:else}
+                    <div class="space-y-2">
+                      {#each user.tasks as task}
+                        <div class="flex items-start gap-2">
+                          <span class="text-[10px] mt-0.5 {isOverdue(task.due_date) ? 'text-danger' : 'text-text-secondary'} font-mono whitespace-nowrap">
+                            {formatRelativeDate(task.due_date)}
+                          </span>
+                          <span class="text-xs text-text-primary leading-tight">{task.title}</span>
+                        </div>
+                      {/each}
+                    </div>
+                  {/if}
+                </div>
+              {/each}
+            </div>
+          </div>
+        {/if}
+
         <!-- 2-Column Grid Layout -->
         <div class="grid grid-cols-1 md:grid-cols-2 gap-8 items-start">
           
@@ -285,38 +318,6 @@
 
         </div>
 
-        <!-- Upcoming Tasks Section -->
-        {#if upcomingData.users.length > 0}
-          <div class="bg-bg-card border border-border rounded-xl overflow-hidden shadow-xl">
-            <div class="px-5 py-3 border-b border-border">
-              <h2 class="text-sm font-semibold text-text-primary uppercase tracking-wider">
-                📋 Upcoming Tasks
-              </h2>
-            </div>
-            <div class="grid grid-cols-1 md:grid-cols-3 gap-0 divide-y md:divide-y-0 md:divide-x divide-border">
-              {#each upcomingData.users as user}
-                <div class="p-4">
-                  <h3 class="text-xs font-bold text-accent mb-3 uppercase tracking-wider">{user.name}</h3>
-                  {#if user.tasks.length === 0}
-                    <p class="text-[11px] text-text-secondary italic">No pending tasks</p>
-                  {:else}
-                    <div class="space-y-2">
-                      {#each user.tasks as task}
-                        <div class="flex items-start gap-2">
-                          <span class="text-[10px] mt-0.5 {isOverdue(task.due_date) ? 'text-danger' : 'text-text-secondary'} font-mono whitespace-nowrap">
-                            {formatRelativeDate(task.due_date)}
-                          </span>
-                          <span class="text-xs text-text-primary leading-tight">{task.title}</span>
-                        </div>
-                      {/each}
-                    </div>
-                  {/if}
-                </div>
-              {/each}
-            </div>
-          </div>
-        {/if}
-
       {:else if currentView === 'tasks'}
         <!-- Task Manager View -->
         <div class="bg-bg-card border border-border rounded-xl p-6 shadow-xl">

Provider/frontend/src/lib/Sidebar.svelte

@@ -1,6 +1,6 @@
 <script>
   let { currentView = 'dashboard', onNavigate = () => {} } = $props();
-  let collapsed = $state(false);
+  let collapsed = $state(typeof window !== 'undefined' && window.innerWidth <= 768);
 
   const navItems = [
     { id: 'dashboard', label: 'Dashboard', icon: '🏠' },

Provider/frontend/src/lib/TaskManager.svelte

@@ -8,13 +8,15 @@
 
   // Add task form state
   let newTitle = $state('');
-  let newDueDate = $state('');
+  let newDueDay = $state('');
+  let newDueTime = $state('');
   let showAddForm = $state(false);
 
   // Edit state
   let editingTaskId = $state(null);
   let editTitle = $state('');
-  let editDueDate = $state('');
+  let editDueDay = $state('');
+  let editDueTime = $state('');
 
   // Confirm delete
   let confirmDeleteId = $state(null);
@@ -45,13 +47,14 @@
 
   async function handleAddTask(e) {
     e.preventDefault();
-    if (!newTitle.trim() || !newDueDate) return;
+    if (!newTitle.trim() || !newDueDay || !newDueTime) return;
 
-    const dueTimestamp = Math.floor(new Date(newDueDate).getTime() / 1000);
+    const dueTimestamp = Math.floor(new Date(`${newDueDay}T${newDueTime}`).getTime() / 1000);
     try {
       await addTask(selectedUserId, newTitle.trim(), dueTimestamp);
       newTitle = '';
-      newDueDate = '';
+      newDueDay = '';
+      newDueTime = '';
       showAddForm = false;
       await fetchTasks();
     } catch (e) {
@@ -71,14 +74,16 @@
   function startEditing(task) {
     editingTaskId = task.id;
     editTitle = task.title;
-    editDueDate = formatDateForInput(task.due_date);
+    const parts = formatDateForInput(task.due_date);
+    editDueDay = parts.day;
+    editDueTime = parts.time;
   }
 
   async function saveEdit(e) {
     e.preventDefault();
     if (!editTitle.trim()) return;
 
-    const dueTimestamp = Math.floor(new Date(editDueDate).getTime() / 1000);
+    const dueTimestamp = Math.floor(new Date(`${editDueDay}T${editDueTime}`).getTime() / 1000);
     try {
       await updateTask(editingTaskId, {
         title: editTitle.trim(),
@@ -103,7 +108,18 @@
 
   function formatDateForInput(timestamp) {
     const d = new Date(timestamp * 1000);
-    return d.toISOString().slice(0, 16); // "YYYY-MM-DDTHH:mm"
+    const year = d.getFullYear();
+    const month = String(d.getMonth() + 1).padStart(2, '0');
+    const dayNum = String(d.getDate()).padStart(2, '0');
+    const hours = String(d.getHours()).padStart(2, '0');
+    const mins = String(d.getMinutes()).padStart(2, '0');
+    return { day: `${year}-${month}-${dayNum}`, time: `${hours}:${mins}` };
+  }
+
+  function setNowForNewTask() {
+    const parts = formatDateForInput(Date.now() / 1000);
+    newDueDay = parts.day;
+    newDueTime = parts.time;
   }
 
   function formatRelativeDate(timestamp) {
@@ -135,12 +151,13 @@
     <div class="task-header">
       <h2 class="task-title">Tasks</h2>
       {#if !showAddForm}
-        <button class="add-task-btn" onclick={() => showAddForm = true}>+ Add Task</button>
+        <button class="add-task-btn" onclick={() => { showAddForm = true; setNowForNewTask(); }}>+ Add Task</button>
       {/if}
     </div>
 
     {#if showAddForm}
       <form class="add-task-form" onsubmit={handleAddTask}>
+        <!-- svelte-ignore a11y_autofocus -->
         <input
           type="text"
           bind:value={newTitle}
@@ -148,14 +165,19 @@
           class="task-input"
           autofocus
         />
-        <input
-          type="datetime-local"
-          bind:value={newDueDate}
-          class="task-date-input"
-        />
+        <div class="date-time-row">
+          <label class="date-time-field">
+            <span class="field-label">Date</span>
+            <input type="date" bind:value={newDueDay} class="task-date-input" />
+          </label>
+          <label class="date-time-field">
+            <span class="field-label">Time</span>
+            <input type="time" bind:value={newDueTime} class="task-time-input" />
+          </label>
+        </div>
         <div class="form-actions">
-          <button type="submit" class="btn-primary" disabled={!newTitle.trim() || !newDueDate}>Add</button>
-          <button type="button" class="btn-secondary" onclick={() => { showAddForm = false; newTitle = ''; newDueDate = ''; }}>Cancel</button>
+          <button type="submit" class="btn-primary" disabled={!newTitle.trim() || !newDueDay || !newDueTime}>Add</button>
+          <button type="button" class="btn-secondary" onclick={() => { showAddForm = false; newTitle = ''; newDueDay = ''; newDueTime = ''; }}>Cancel</button>
         </div>
       </form>
     {/if}
@@ -166,7 +188,16 @@
           {#if editingTaskId === task.id}
             <form class="edit-form" onsubmit={saveEdit}>
               <input type="text" bind:value={editTitle} class="task-input" />
-              <input type="datetime-local" bind:value={editDueDate} class="task-date-input" />
+              <div class="date-time-row">
+                <label class="date-time-field">
+                  <span class="field-label">Date</span>
+                  <input type="date" bind:value={editDueDay} class="task-date-input" />
+                </label>
+                <label class="date-time-field">
+                  <span class="field-label">Time</span>
+                  <input type="time" bind:value={editDueTime} class="task-time-input" />
+                </label>
+              </div>
               <div class="form-actions">
                 <button type="submit" class="btn-primary btn-sm">Save</button>
                 <button type="button" class="btn-secondary btn-sm" onclick={() => editingTaskId = null}>Cancel</button>
@@ -274,6 +305,29 @@
     border-color: var(--color-accent);
   }
 
+  .date-time-row {
+    display: flex;
+    gap: 8px;
+  }
+
+  .date-time-field {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+  }
+
+  .date-time-field:first-child {
+    flex: 1;
+  }
+
+  .field-label {
+    font-size: 10px;
+    font-weight: 600;
+    text-transform: uppercase;
+    letter-spacing: 0.05em;
+    color: var(--color-text-secondary);
+  }
+
   .task-date-input {
     padding: 8px 12px;
     border-radius: 8px;
@@ -283,9 +337,40 @@
     font-size: 13px;
     outline: none;
     color-scheme: dark;
+    flex: 1;
+    cursor: pointer;
+    position: relative;
   }
 
-  .task-date-input:focus {
+  .task-time-input {
+    padding: 8px 12px;
+    border-radius: 8px;
+    border: 1px solid var(--color-border);
+    background: var(--color-bg-primary);
+    color: var(--color-text-primary);
+    font-size: 13px;
+    outline: none;
+    color-scheme: dark;
+    width: 110px;
+    cursor: pointer;
+    position: relative;
+  }
+
+  /* Make the native picker icon cover the entire input (Chrome/Edge only) */
+  .task-date-input::-webkit-calendar-picker-indicator,
+  .task-time-input::-webkit-calendar-picker-indicator {
+    position: absolute;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    width: auto;
+    height: auto;
+    opacity: 0;
+    cursor: pointer;
+  }
+
+  .task-date-input:focus, .task-time-input:focus {
     border-color: var(--color-accent);
   }
 

Provider/frontend/src/lib/UserManager.svelte

@@ -59,9 +59,13 @@
   <div class="user-bar">
     <div class="user-chips">
       {#each users as user}
-        <button
+        <!-- svelte-ignore node_invalid_placement_ssr -->
+        <div
           class="user-chip {selectedUserId === user.id ? 'selected' : ''}"
           onclick={() => selectedUserId = user.id}
+          role="button"
+          tabindex="0"
+          onkeydown={(e) => { if (e.key === 'Enter') selectedUserId = user.id; }}
         >
           <span class="user-name">{user.name}</span>
           {#if confirmDeleteId === user.id}
@@ -76,11 +80,12 @@
               title="Remove user"
             >✕</button>
           {/if}
-        </button>
+        </div>
       {/each}
 
       {#if showAddForm}
         <form class="add-user-form" onsubmit={(e) => { e.preventDefault(); handleAddUser(); }}>
+          <!-- svelte-ignore a11y_autofocus -->
           <input
             type="text"
             bind:value={newUserName}

Provider/frontend/version.json

@@ -1,5 +1,5 @@
 {
   "major": 0,
   "minor": 1,
-  "revision": 14
+  "revision": 4
 }

Provider/main/main.cpp

@@ -12,7 +12,6 @@
 #include "nvs_flash.h"
 #include "soc/gpio_num.h"
 
-
 // Project headers
 #include "appstate.hpp"
 #include "types.hpp"
@@ -45,25 +44,23 @@ extern "C" void app_main()
   nvs_handle_t my_handle;
   if (nvs_open("storage", NVS_READWRITE, &my_handle) == ESP_OK)
   {
-    // If we are running from the factory partition, force the www partition to
-    // 0 This ensures that after a USB flash (which only writes to www_0), we
-    // aren't stuck looking at an old www_1.
-    const esp_partition_t *running = esp_ota_get_running_partition();
-    if (running && running->subtype == ESP_PARTITION_SUBTYPE_APP_FACTORY)
+    // Read active www partition from NVS
+    err = nvs_get_u8(my_handle, "www_part", &g_Active_WWW_Partition);
+
+    if (err == ESP_ERR_NVS_NOT_FOUND)
     {
-      printf(
-          "Running from factory: resetting www_part to 0 for consistency.\n");
+      // First boot (no NVS key yet): default to www_0
+      // This ensures that after a fresh USB flash (which only writes www_0),
+      // we start from the correct partition.
+      printf("No www_part in NVS, defaulting to 0.\n");
       g_Active_WWW_Partition = 0;
       nvs_set_u8(my_handle, "www_part", 0);
       nvs_commit(my_handle);
     }
-    else
+    else if (err != ESP_OK)
     {
-      err = nvs_get_u8(my_handle, "www_part", &g_Active_WWW_Partition);
-      if (err != ESP_OK && err != ESP_ERR_NVS_NOT_FOUND)
-      {
-        printf("Error reading www_part from NVS: %s\n", esp_err_to_name(err));
-      }
+      printf("Error reading www_part from NVS: %s\n", esp_err_to_name(err));
+      g_Active_WWW_Partition = 0;
     }
 
     if (g_Active_WWW_Partition > 1)

Provider/tdd/todo_list.md

@@ -156,7 +156,38 @@ frontend/src/
 └── app.css                      # +sidebar theme tokens
 ```
 
-## 5. Summary
+## 5. Changelog
+
+### 2026-03-07 — API Refactoring & UI Improvements
+
+**Backend Refactoring:**
+- Split monolithic `manage.cpp` and `utils.cpp` into single-responsibility files per endpoint (e.g., `list.cpp`, `add.cpp`, `remove.cpp`)
+- Renamed `seed.cpp` → `store.cpp` in both `api/users/` and `api/tasks/` (better name for the data-store layer)
+- Introduced `store.hpp` forward-declaration headers to resolve cross-domain dependencies (tasks needs `find_user`, users/remove needs `remove_tasks_for_user`)
+- Added `unity.cpp` per domain to simplify `http_server.cpp` includes
+- `.hpp` files contain structs and constants only; all functions live in `.cpp` files
+
+**Frontend OTA Bug Fix:**
+- Fixed `main.cpp` factory-partition check that unconditionally reset `www_part` to 0 on every boot, preventing OTA from ever switching to `www_1`
+- Now only defaults to `www_0` on first boot (NVS key not found); OTA-written values are respected
+
+**Date/Time Picker UX:**
+- Fixed timezone drift bug: `formatDateForInput` used `toISOString()` (UTC) but `datetime-local` inputs use local time, causing ±N hours shift on each edit
+- Split `datetime-local` into separate `date` + `time` inputs with labels
+- Default date/time set to "now" when opening the add task form
+- CSS trick to make Chrome/Edge open the picker on click anywhere in the input (`::-webkit-calendar-picker-indicator` stretched to fill)
+
+**Dashboard Layout:**
+- Moved "Upcoming Tasks" section above the system info grid (content-first, debug tools lower)
+
+**Sidebar:**
+- Auto-collapses on mobile (viewport ≤ 768px) via `window.innerWidth` check at init
+
+**Build Warnings Fixed:**
+- `<button>` inside `<button>` nesting in UserManager → changed user chips to `<div role="button">`
+- `autofocus` a11y warnings suppressed with `<!-- svelte-ignore -->` comments
+
+## 6. Summary
 
 We implement a **temporary in-memory todo list** using **static BSS arrays** on the ESP32 backend, exposed via a **RESTful API** with 8 new endpoints. The frontend gains a **collapsible sidebar** for navigation between the existing Dashboard and a new **Task Manager** view. **Seed data** is populated on every boot for fast development iteration. The architecture is designed to make the eventual migration to **SQLite on SD card** straightforward — the API contracts and frontend components remain unchanged; only the storage layer swaps out.