feat(tasks): add activity log, Markdown editor, and dark-mode polish

Backend
- Add TaskActivity model to record start/pause/review/complete/cancel/reopen
- Preserve started_at when reopening tasks; keep timestamps in app-local time
- Expose recent activities on task detail view

Migrations
- Add 004_add_task_activities_table (FKs + indexes)

Task detail (UI)
- Move Description into its own card and render as Markdown (markdown + bleach)
- Restyle Quick Actions to use dashboard btn-action styles
- Add custom confirmation modal + tooltips
- Recent Time Entries: use dashboard action buttons, add progressive “Show more/less” (10 per click)

Tasks list
- Fix dark mode for filter UI (inputs, selects, input-group-text, checkboxes)

Create/Edit task
- Integrate EasyMDE Markdown editor with toolbar
- Strong dark-theme overrides (toolbar, editor, preview, status bar, tokens)
- Prevent unintended side-by-side persistence
- Align “Current Task Info” dark-mode styles with task detail

CSS
- Add dark-mode tints for action buttons, tooltip light theme in dark mode
- Editor layout polish (padding, focus ring, gutters, selection)
- Quick actions layout: compact horizontal group

Deps
- Add: markdown, bleach

Run
- flask db upgrade  # applies 004_add_task_activities_table

app/__init__.py

@@ -200,7 +200,7 @@ def create_app(config=None):
     def initialize_database():
         try:
             # Import models to ensure they are registered
-            from app.models import User, Project, TimeEntry, Task, Settings
+            from app.models import User, Project, TimeEntry, Task, Settings, TaskActivity
             
             # Create database tables
             db.create_all()
@@ -322,7 +322,7 @@ def init_database(app):
     with app.app_context():
         try:
             # Import models to ensure they are registered
-            from app.models import User, Project, TimeEntry, Task, Settings
+            from app.models import User, Project, TimeEntry, Task, Settings, TaskActivity
             
             # Create database tables
             db.create_all()

app/models/__init__.py

@@ -5,5 +5,6 @@ from .task import Task
 from .settings import Settings
 from .invoice import Invoice, InvoiceItem
 from .client import Client
+from .task_activity import TaskActivity
 
-__all__ = ['User', 'Project', 'TimeEntry', 'Task', 'Settings', 'Invoice', 'InvoiceItem', 'Client']
+__all__ = ['User', 'Project', 'TimeEntry', 'Task', 'Settings', 'Invoice', 'InvoiceItem', 'Client', 'TaskActivity']

app/models/task_activity.py

@@ -0,0 +1,28 @@
+from app import db
+from app.utils.timezone import now_in_app_timezone
+
+
+class TaskActivity(db.Model):
+    """Lightweight audit log for significant task events."""
+    __tablename__ = 'task_activities'
+
+    id = db.Column(db.Integer, primary_key=True)
+    task_id = db.Column(db.Integer, db.ForeignKey('tasks.id'), nullable=False, index=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True, index=True)
+    event = db.Column(db.String(50), nullable=False, index=True)
+    details = db.Column(db.Text, nullable=True)
+    created_at = db.Column(db.DateTime, default=now_in_app_timezone, nullable=False, index=True)
+
+    task = db.relationship('Task', backref=db.backref('activities', lazy='dynamic', cascade='all, delete-orphan'))
+    user = db.relationship('User')
+
+    def __init__(self, task_id, event, user_id=None, details=None):
+        self.task_id = task_id
+        self.user_id = user_id
+        self.event = event
+        self.details = details
+
+    def __repr__(self):
+        return f'<TaskActivity task={self.task_id} event={self.event}>'
+
+

app/routes/tasks.py

@@ -1,7 +1,7 @@
 from flask import Blueprint, render_template, request, redirect, url_for, flash, jsonify
 from flask_login import login_required, current_user
 from app import db
-from app.models import Task, Project, User, TimeEntry
+from app.models import Task, Project, User, TimeEntry, TaskActivity
 from datetime import datetime, date
 from decimal import Decimal
 from app.utils.db import safe_commit
@@ -166,8 +166,10 @@ def view_task(task_id):
     
     # Get time entries for this task
     time_entries = task.time_entries.order_by(TimeEntry.start_time.desc()).all()
+    # Recent activity entries
+    activities = task.activities.order_by(TaskActivity.created_at.desc()).limit(20).all()
     
-    return render_template('tasks/view.html', task=task, time_entries=time_entries)
+    return render_template('tasks/view.html', task=task, time_entries=time_entries, activities=activities)
 
 @tasks_bp.route('/tasks/<int:task_id>/edit', methods=['GET', 'POST'])
 @login_required
@@ -221,19 +223,40 @@ def edit_task(task_id):
         valid_statuses = ['todo', 'in_progress', 'review', 'done', 'cancelled']
         if selected_status and selected_status in valid_statuses and selected_status != task.status:
             try:
+                previous_status = task.status
                 if selected_status == 'in_progress':
-                    task.start_task()
+                    # If reopening from done, preserve started_at
+                    if task.status == 'done':
+                        task.completed_at = None
+                        task.status = 'in_progress'
+                        if not task.started_at:
+                            task.started_at = now_in_app_timezone()
+                        task.updated_at = now_in_app_timezone()
+                        db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='reopen', details='Task reopened to In Progress'))
+                        if not safe_commit('edit_task_reopen_in_progress', {'task_id': task.id}):
+                            flash('Could not update status due to a database error. Please check server logs.', 'error')
+                            return render_template('tasks/edit.html', task=task)
+                    else:
+                        task.start_task()
+                        db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='start', details=f"Task moved from {previous_status} to In Progress"))
+                        safe_commit('log_task_start_from_edit', {'task_id': task.id})
                 elif selected_status == 'done':
                     task.complete_task()
+                    db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='complete', details='Task completed'))
+                    safe_commit('log_task_complete_from_edit', {'task_id': task.id})
                 elif selected_status == 'cancelled':
                     task.cancel_task()
+                    db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='cancel', details='Task cancelled'))
+                    safe_commit('log_task_cancel_from_edit', {'task_id': task.id})
                 else:
                     # Reopen or move to non-special states
                     # Clear completed_at if reopening from done
-                    if task.status == 'done' and selected_status in ['todo', 'in_progress', 'review']:
+                    if task.status == 'done' and selected_status in ['todo', 'review']:
                         task.completed_at = None
                     task.status = selected_status
                     task.updated_at = now_in_app_timezone()
+                    event_name = 'reopen' if previous_status == 'done' and selected_status in ['todo', 'review'] else ('pause' if selected_status == 'todo' else ('review' if selected_status == 'review' else 'status_change'))
+                    db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event=event_name, details=f"Task moved from {previous_status} to {selected_status}"))
                     if not safe_commit('edit_task_status_change', {'task_id': task.id, 'status': selected_status}):
                         flash('Could not update status due to a database error. Please check server logs.', 'error')
                         return render_template('tasks/edit.html', task=task)
@@ -286,21 +309,40 @@ def update_task_status(task_id):
                 if not task.started_at:
                     task.started_at = now_in_app_timezone()
                 task.updated_at = now_in_app_timezone()
+                db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='reopen', details='Task reopened to In Progress'))
                 if not safe_commit('update_task_status_reopen_in_progress', {'task_id': task.id, 'status': new_status}):
                     flash('Could not update status due to a database error. Please check server logs.', 'error')
                     return redirect(url_for('tasks.view_task', task_id=task.id))
             else:
+                previous_status = task.status
                 task.start_task()
+                db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='start', details=f"Task moved from {previous_status} to In Progress"))
+                safe_commit('log_task_start', {'task_id': task.id})
         elif new_status == 'done':
             task.complete_task()
+            db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='complete', details='Task completed'))
+            safe_commit('log_task_complete', {'task_id': task.id})
         elif new_status == 'cancelled':
             task.cancel_task()
+            db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event='cancel', details='Task cancelled'))
+            safe_commit('log_task_cancel', {'task_id': task.id})
         else:
             # For other transitions, handle reopening from done and local timestamps
             if task.status == 'done' and new_status in ['todo', 'review']:
                 task.completed_at = None
+            previous_status = task.status
             task.status = new_status
             task.updated_at = now_in_app_timezone()
+            # Log pause or review or generic change
+            if previous_status == 'done' and new_status in ['todo', 'review']:
+                event_name = 'reopen'
+            else:
+                event_map = {
+                    'todo': 'pause',
+                    'review': 'review',
+                }
+                event_name = event_map.get(new_status, 'status_change')
+            db.session.add(TaskActivity(task_id=task.id, user_id=current_user.id, event=event_name, details=f"Task moved from {previous_status} to {new_status}"))
             if not safe_commit('update_task_status', {'task_id': task.id, 'status': new_status}):
                 flash('Could not update status due to a database error. Please check server logs.', 'error')
                 return redirect(url_for('tasks.view_task', task_id=task.id))

app/static/base.css

@@ -376,9 +376,120 @@ main {
     background: #0f172a;
     color: var(--text-primary);
 }
+[data-theme="dark"] textarea.form-control {
+    background: #0f172a;
+    color: var(--text-primary);
+    border-color: var(--border-color);
+}
+
+/* EasyMDE (Markdown editor) dark theme overrides */
+[data-theme="dark"] .EasyMDEContainer .editor-toolbar {
+    background: #0b1220 !important;
+    border-color: var(--border-color) !important;
+    box-shadow: inset 0 -1px 0 rgba(255,255,255,0.03);
+}
+[data-theme="dark"] .EasyMDEContainer .editor-toolbar a {
+    color: var(--text-secondary) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .editor-toolbar a:hover,
+[data-theme="dark"] .EasyMDEContainer .editor-toolbar a.active {
+    background: #111827 !important;
+    color: var(--text-primary) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .CodeMirror,
+[data-theme="dark"] .EasyMDEContainer .CodeMirror-scroll,
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde.CodeMirror,
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde .CodeMirror-scroll {
+    background: #0f172a !important;
+    color: var(--text-primary) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde.CodeMirror {
+    border: 1px solid var(--border-color) !important;
+    border-top: none !important; /* aligns with toolbar border */
+}
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde .CodeMirror-gutters {
+    background: #0f172a !important;
+    border-right: 1px solid var(--border-color) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .CodeMirror-selected {
+    background: rgba(59,130,246,0.25) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde .cm-url { color: #93c5fd !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde .cm-code { color: #fca5a5 !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-s-easymde .cm-hr { color: #475569 !important; }
+[data-theme="dark"] .EasyMDEContainer .CodeMirror pre { color: var(--text-primary) !important; }
+[data-theme="dark"] .EasyMDEContainer .CodeMirror-cursor { border-left-color: #e5e7eb !important; }
+[data-theme="dark"] .EasyMDEContainer .CodeMirror .CodeMirror-placeholder { color: #64748b !important; }
+[data-theme="dark"] .EasyMDEContainer .editor-statusbar {
+    background: #0b1220 !important;
+    color: var(--text-secondary) !important;
+    border-color: var(--border-color) !important;
+}
+[data-theme="dark"] .EasyMDEContainer .editor-preview,
+[data-theme="dark"] .EasyMDEContainer .editor-preview-side {
+    background: #0f172a !important;
+    color: var(--text-primary) !important;
+}
+/* Token colors for dark mode (readability) */
+[data-theme="dark"] .EasyMDEContainer .cm-header { color: #93c5fd !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-strong { color: #e5e7eb !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-em { color: #fca5a5 !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-quote { color: #a7f3d0 !important; }
+[data-theme="dark"] .EasyMDEContainer .cm-link { color: #60a5fa !important; text-decoration: underline; }
+[data-theme="dark"] .EasyMDEContainer .cm-formatting-header { color: #60a5fa !important; }
+
+/* EasyMDE global layout enhancements (both themes) */
+.EasyMDEContainer {
+    border: 1px solid var(--border-color);
+    border-radius: var(--border-radius-sm);
+    overflow: hidden;
+    background: transparent;
+}
+.EasyMDEContainer .editor-toolbar {
+    border-bottom: 1px solid var(--border-color);
+    padding: 0.25rem 0.5rem;
+}
+.EasyMDEContainer .editor-toolbar a {
+    border-radius: 6px;
+    height: 32px;
+    width: 32px;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+}
+.EasyMDEContainer .editor-toolbar .separator {
+    border-left: 1px solid var(--border-color);
+    margin: 0 0.35rem;
+}
+.EasyMDEContainer .CodeMirror {
+    min-height: 260px;
+    font-size: 0.95rem;
+    line-height: 1.5;
+}
+.EasyMDEContainer .editor-preview-side { max-width: 50%; }
+.EasyMDEContainer .CodeMirror, .EasyMDEContainer .editor-preview-side { box-sizing: border-box; }
+.EasyMDEContainer .CodeMirror-scroll {
+    padding: 0.75rem 1rem;
+}
+.EasyMDEContainer .CodeMirror-focused {
+    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
+}
+.EasyMDEContainer .editor-statusbar {
+    border-top: 1px solid var(--border-color);
+    padding: 0.375rem 0.75rem;
+}
+[data-theme="dark"] .input-group-text {
+    background: #111827;
+    color: var(--text-secondary);
+    border-color: var(--border-color);
+}
 [data-theme="dark"] .form-text { color: var(--text-muted); }
 [data-theme="dark"] .form-control::placeholder { color: #64748b; }
 [data-theme="dark"] .form-select option { background: #0f172a; color: var(--text-primary); }
+[data-theme="dark"] .form-check-input {
+    background-color: #0f172a;
+    border-color: var(--border-color);
+}
 
 .form-control:focus, .form-select:focus {
     border-color: var(--primary-color);
@@ -505,31 +616,36 @@ main {
     background: #0f172a;
     border-color: var(--border-color);
     color: var(--text-secondary);
+    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.03);
 }
 [data-theme="dark"] .btn-action:hover { background: #111827; }
 [data-theme="dark"] .btn-action--view {
-    color: #93c5fd;
+    color: #60a5fa;
+    background: rgba(59, 130, 246, 0.08);
     border-color: rgba(59, 130, 246, 0.35);
 }
-[data-theme="dark"] .btn-action--view:hover { background: rgba(59, 130, 246, 0.08); }
+[data-theme="dark"] .btn-action--view:hover { background: rgba(59, 130, 246, 0.12); }
 [data-theme="dark"] .btn-action--edit {
     color: var(--text-secondary);
     border-color: var(--border-color);
 }
 [data-theme="dark"] .btn-action--edit:hover { background: #111827; }
 [data-theme="dark"] .btn-action--danger {
-    color: #fca5a5;
-    border-color: rgba(220, 38, 38, 0.45);
+    color: #ef4444;
+    background: rgba(239, 68, 68, 0.06);
+    border-color: rgba(220, 38, 38, 0.35);
 }
 [data-theme="dark"] .btn-action--danger:hover { background: rgba(220, 38, 38, 0.12); }
 [data-theme="dark"] .btn-action--success {
-    color: #86efac;
-    border-color: rgba(16, 185, 129, 0.45);
+    color: #22c55e;
+    background: rgba(16, 185, 129, 0.08);
+    border-color: rgba(16, 185, 129, 0.35);
 }
-[data-theme="dark"] .btn-action--success:hover { background: rgba(16, 185, 129, 0.12); }
+[data-theme="dark"] .btn-action--success:hover { background: rgba(16, 185, 129, 0.14); }
 [data-theme="dark"] .btn-action--warning {
-    color: #fcd34d;
-    border-color: rgba(245, 158, 11, 0.55);
+    color: #f59e0b;
+    background: rgba(245, 158, 11, 0.06);
+    border-color: rgba(245, 158, 11, 0.35);
 }
 [data-theme="dark"] .btn-action--warning:hover { background: rgba(245, 158, 11, 0.12); }
 [data-theme="dark"] .btn-action--more {
@@ -1371,3 +1487,26 @@ h6 { font-size: 1rem; }
     border-radius: 9999px;
 }
 
+/* Tooltip overrides to keep light tooltips in dark mode */
+[data-theme="dark"] .tooltip .tooltip-inner {
+    background-color: #f9fafb; /* light */
+    color: #111827; /* dark text */
+    border: 1px solid rgba(0,0,0,0.1);
+}
+[data-theme="dark"] .tooltip.bs-tooltip-top .tooltip-arrow::before,
+[data-theme="dark"] .tooltip.bs-tooltip-auto[data-popper-placement^="top"] .tooltip-arrow::before {
+    border-top-color: #f9fafb;
+}
+[data-theme="dark"] .tooltip.bs-tooltip-bottom .tooltip-arrow::before,
+[data-theme="dark"] .tooltip.bs-tooltip-auto[data-popper-placement^="bottom"] .tooltip-arrow::before {
+    border-bottom-color: #f9fafb;
+}
+[data-theme="dark"] .tooltip.bs-tooltip-start .tooltip-arrow::before,
+[data-theme="dark"] .tooltip.bs-tooltip-auto[data-popper-placement^="left"] .tooltip-arrow::before {
+    border-left-color: #f9fafb;
+}
+[data-theme="dark"] .tooltip.bs-tooltip-end .tooltip-arrow::before,
+[data-theme="dark"] .tooltip.bs-tooltip-auto[data-popper-placement^="right"] .tooltip-arrow::before {
+    border-right-color: #f9fafb;
+}
+

app/templates/tasks/create.html

@@ -46,10 +46,11 @@
 
                         <!-- Description -->
                         <div class="mb-4">
-                            <label for="description" class="form-label fw-semibold">
+                            <label for="description" class="form-label fw-semibold d-flex align-items-center justify-content-between">
                                 <i class="fas fa-align-left me-2 text-primary"></i>Description
+                                <small class="text-muted">Supports Markdown</small>
                             </label>
-                            <textarea class="form-control" id="description" name="description" rows="4" 
+                            <textarea class="form-control" id="description" name="description" rows="6" 
                                       placeholder="Provide detailed information about the task, requirements, and any specific instructions...">{{ request.form.get('description', '') }}</textarea>
                             <small class="form-text text-muted">Optional: Add context, requirements, or specific instructions for the task</small>
                         </div>
@@ -419,12 +420,30 @@
 }
 </style>
 
+<!-- EasyMDE Markdown Editor -->
+<link rel="stylesheet" href="https://unpkg.com/easymde/dist/easymde.min.css">
+<script src="https://unpkg.com/easymde/dist/easymde.min.js"></script>
+
 <script>
 // Form validation and enhancement
 document.addEventListener('DOMContentLoaded', function() {
     const form = document.getElementById('createTaskForm');
     const nameInput = document.getElementById('name');
     const descriptionInput = document.getElementById('description');
+
+    // Initialize EasyMDE for Markdown input
+    if (descriptionInput && window.EasyMDE) {
+        const easyMDE = new EasyMDE({
+            element: descriptionInput,
+            spellChecker: false,
+            status: false,
+            toolbar: [
+                'bold','italic','heading','|','unordered-list','ordered-list','|','link','quote','code','table','horizontal-rule','|','preview','guide'
+            ],
+            renderingConfig: { singleLineBreaks: false },
+            minHeight: '260px'
+        });
+    }
     
     // Auto-resize description textarea
     if (descriptionInput) {

app/templates/tasks/edit.html

@@ -46,11 +46,14 @@
 
                         <!-- Description -->
                         <div class="mb-4">
-                            <label for="description" class="form-label fw-semibold">
-                                <i class="fas fa-align-left me-2 text-primary"></i>Description
+                            <label for="description" class="form-label fw-semibold d-flex align-items-center justify-content-between">
+                                <span><i class="fas fa-align-left me-2 text-primary"></i>Description</span>
+                                <small class="text-muted">Markdown supported</small>
                             </label>
-                            <textarea class="form-control" id="description" name="description" rows="4" 
-                                      placeholder="Provide detailed information about the task, requirements, and any specific instructions...">{{ task.description or '' }}</textarea>
+                            <div class="markdown-editor-wrapper">
+                                <textarea class="form-control" id="description" name="description" rows="8"
+                                          placeholder="Provide detailed information about the task, requirements, and any specific instructions...">{{ task.description or '' }}</textarea>
+                            </div>
                             <small class="form-text text-muted">Optional: Add context, requirements, or specific instructions for the task</small>
                         </div>
 
@@ -400,6 +403,16 @@
     transform: translateX(4px);
 }
 
+/* Dark mode for task info blocks to match view page */
+[data-theme="dark"] .task-info-item,
+[data-theme="dark"] .tip-item {
+    background-color: #0f172a;
+}
+[data-theme="dark"] .task-info-item:hover,
+[data-theme="dark"] .tip-item:hover {
+    background-color: #0b1220;
+}
+
 /* Form Styling */
 .form-control:focus,
 .form-select:focus {
@@ -415,6 +428,12 @@
     min-height: 56px;
 }
 
+/* Markdown editor wrapper to align with cards */
+.markdown-editor-wrapper {
+    border-radius: 8px;
+    overflow: hidden;
+}
+
 /* Mobile Optimizations */
 @media (max-width: 768px) {
     .card-header {
@@ -443,6 +462,10 @@
 }
 </style>
 
+<!-- EasyMDE Markdown Editor -->
+<link rel="stylesheet" href="https://unpkg.com/easymde/dist/easymde.min.css">
+<script src="https://unpkg.com/easymde/dist/easymde.min.js"></script>
+
 <script>
 // Form validation and enhancement
 document.addEventListener('DOMContentLoaded', function() {
@@ -450,12 +473,25 @@ document.addEventListener('DOMContentLoaded', function() {
     const nameInput = document.getElementById('name');
     const descriptionInput = document.getElementById('description');
     
-    // Auto-resize description textarea
-    if (descriptionInput) {
-        descriptionInput.addEventListener('input', function() {
-            this.style.height = 'auto';
-            this.style.height = (this.scrollHeight) + 'px';
+    // Initialize EasyMDE for Markdown input
+    if (descriptionInput && window.EasyMDE) {
+        const easyMDE = new EasyMDE({
+            element: descriptionInput,
+            spellChecker: false,
+            status: false,
+            toolbar: [
+                'bold','italic','heading','|','unordered-list','ordered-list','|','link','quote','code','table','horizontal-rule','|','preview','guide'
+            ],
+            renderingConfig: { singleLineBreaks: false },
+            minHeight: '260px'
         });
+        // Ensure side-by-side is not persisted from previous sessions
+        try {
+            const container = descriptionInput.closest('.EasyMDEContainer');
+            if (container && container.classList.contains('side-by-side')) {
+                easyMDE.toggleSideBySide();
+            }
+        } catch (e) {}
     }
     
     // Form submission enhancement

app/templates/tasks/view.html

@@ -25,9 +25,6 @@
                                 </div>
                                 <div class="flex-grow-1">
                                     <h1 class="h2 mb-2">{{ task.name }}</h1>
-                                    {% if task.description %}
-                                    <p class="text-muted mb-0">{{ task.description }}</p>
-                                    {% endif %}
                                 </div>
                             </div>
                             
@@ -76,6 +73,22 @@
     <div class="row g-4">
         <!-- Main Task Information -->
         <div class="col-lg-8">
+            <!-- Task Description -->
+            {% if task.description %}
+            <div class="card mobile-card mb-4">
+                <div class="card-header d-flex align-items-center justify-content-between">
+                    <h6 class="mb-0">
+                        <i class="fas fa-align-left me-2 text-primary"></i>Description
+                    </h6>
+                </div>
+                <div class="card-body">
+                    <div class="task-description-content">
+                        {{ task.description | markdown | safe }}
+                    </div>
+                </div>
+            </div>
+            {% endif %}
+
             <!-- Project Information -->
             <div class="card mobile-card mb-4">
                 <div class="card-header">
@@ -178,8 +191,8 @@
                                     <th class="text-end">Actions</th>
                                 </tr>
                             </thead>
-                            <tbody>
-                                {% for entry in time_entries[:5] %}
+                            <tbody id="timeEntriesTableBody">
+                                {% for entry in time_entries %}
                                 <tr>
                                     <td>{{ entry.start_time.strftime('%b %d, %Y') }}</td>
                                     <td>
@@ -191,14 +204,14 @@
                                     </td>
                                     <td>{{ entry.notes[:50] if entry.notes else '-' }}</td>
                                     <td>{{ entry.user.display_name if entry.user else '-' }}</td>
-                                    <td class="text-end">
+                                    <td class="text-end pe-4 actions-cell">
                                         <div class="btn-group" role="group">
                                             <a href="{{ url_for('timer.edit_timer', timer_id=entry.id) }}"
-                                               class="btn btn-sm btn-outline-primary" title="Edit">
+                                               class="btn btn-sm btn-action btn-action--edit touch-target" title="Edit entry">
                                                 <i class="fas fa-edit"></i>
                                             </a>
                                             {% if current_user.is_admin or entry.user_id == current_user.id %}
-                                            <button type="button" class="btn btn-sm btn-outline-danger" title="Delete"
+                                            <button type="button" class="btn btn-sm btn-action btn-action--danger touch-target" title="Delete entry"
                                                     onclick="showDeleteEntryModal('{{ entry.id }}', '{{ task.project.name }}', '{{ entry.duration_formatted }}')">
                                                 <i class="fas fa-trash"></i>
                                             </button>
@@ -210,9 +223,17 @@
                             </tbody>
                         </table>
                     </div>
-                    {% if task.time_entries.count() > 5 %}
-                    <div class="text-center mt-3">
-                        <small class="text-muted">Showing 5 of {{ task.time_entries.count() }} entries</small>
+                    {% if task.time_entries.count() > 10 %}
+                    <div class="d-flex justify-content-between align-items-center mt-3">
+                        <small class="text-muted" id="entriesInfo">Showing 10 of {{ task.time_entries.count() }} entries</small>
+                        <div class="d-flex gap-2">
+                            <button class="btn btn-sm btn-outline-secondary" id="showMoreBtn" onclick="showMoreEntries()">
+                                <i class="fas fa-chevron-down me-2"></i>Show more
+                            </button>
+                            <button class="btn btn-sm btn-outline-secondary d-none" id="showLessBtn" onclick="showLessEntries()">
+                                <i class="fas fa-chevron-up me-2"></i>Show less
+                            </button>
+                        </div>
                     </div>
                     {% endif %}
                 </div>
@@ -314,34 +335,38 @@
                     </h6>
                 </div>
                 <div class="card-body">
-                    <div class="d-grid gap-2">
+                    <div class="quick-actions d-flex flex-wrap gap-2">
                         {% if task.status == 'todo' %}
-                        <button class="btn btn-warning btn-sm" onclick="updateTaskStatus('in_progress')">
-                            <i class="fas fa-play me-2"></i>Start Task
+                        <button class="btn btn-sm btn-action btn-action--success" onclick="openStatusModal('in_progress')" title="Start Task" data-bs-toggle="tooltip">
+                            <i class="fas fa-play"></i>
                         </button>
                         {% elif task.status == 'in_progress' %}
-                        <button class="btn btn-info btn-sm" onclick="updateTaskStatus('review')">
-                            <i class="fas fa-eye me-2"></i>Mark for Review
-                        </button>
-                        <button class="btn btn-secondary btn-sm" onclick="updateTaskStatus('todo')">
-                            <i class="fas fa-pause me-2"></i>Pause Task
-                        </button>
+                        <div class="btn-group" role="group">
+                            <button class="btn btn-sm btn-action btn-action--view" onclick="openStatusModal('review')" title="Mark for Review" data-bs-toggle="tooltip">
+                                <i class="fas fa-eye"></i>
+                            </button>
+                            <button class="btn btn-sm btn-action btn-action--warning" onclick="openStatusModal('todo')" title="Pause Task" data-bs-toggle="tooltip">
+                                <i class="fas fa-pause"></i>
+                            </button>
+                        </div>
                         {% elif task.status == 'review' %}
-                        <button class="btn btn-success btn-sm" onclick="updateTaskStatus('done')">
-                            <i class="fas fa-check me-2"></i>Complete Task
-                        </button>
-                        <button class="btn btn-warning btn-sm" onclick="updateTaskStatus('in_progress')">
-                            <i class="fas fa-undo me-2"></i>Back to Progress
-                        </button>
+                        <div class="btn-group" role="group">
+                            <button class="btn btn-sm btn-action btn-action--success" onclick="openStatusModal('done')" title="Complete Task" data-bs-toggle="tooltip">
+                                <i class="fas fa-check"></i>
+                            </button>
+                            <button class="btn btn-sm btn-action btn-action--edit" onclick="openStatusModal('in_progress')" title="Back to Progress" data-bs-toggle="tooltip">
+                                <i class="fas fa-undo"></i>
+                            </button>
+                        </div>
                         {% elif task.status == 'done' %}
-                        <button class="btn btn-warning btn-sm" onclick="updateTaskStatus('todo')">
-                            <i class="fas fa-undo me-2"></i>Reopen Task
+                        <button class="btn btn-sm btn-action btn-action--warning" onclick="openStatusModal('todo')" title="Reopen Task" data-bs-toggle="tooltip">
+                            <i class="fas fa-undo"></i>
                         </button>
                         {% endif %}
                         
                         {% if task.status != 'done' and task.status != 'cancelled' %}
-                        <button class="btn btn-danger btn-sm" onclick="updateTaskStatus('cancelled')">
-                            <i class="fas fa-times me-2"></i>Cancel Task
+                        <button class="btn btn-sm btn-action btn-action--danger" onclick="openStatusModal('cancelled')" title="Cancel Task" data-bs-toggle="tooltip">
+                            <i class="fas fa-times"></i>
                         </button>
                         {% endif %}
                     </div>
@@ -395,6 +420,41 @@
                     </div>
                 </div>
             </div>
+
+            <!-- Activity Log -->
+            {% if task.activities.count() > 0 %}
+            <div class="card mobile-card mt-4">
+                <div class="card-header">
+                    <h6 class="mb-0">
+                        <i class="fas fa-clipboard-list me-2 text-secondary"></i>Activity Log
+                    </h6>
+                </div>
+                <div class="card-body">
+                    <div class="table-responsive">
+                        <table class="table table-sm align-middle">
+                            <thead>
+                                <tr>
+                                    <th>When</th>
+                                    <th>Event</th>
+                                    <th>User</th>
+                                    <th>Details</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                {% for act in activities %}
+                                <tr>
+                                    <td>{{ act.created_at.strftime('%Y-%m-%d %H:%M') }}</td>
+                                    <td class="text-capitalize">{{ act.event.replace('_', ' ') }}</td>
+                                    <td>{{ act.user.display_name if act.user else '-' }}</td>
+                                    <td class="text-muted">{{ act.details or '' }}</td>
+                                </tr>
+                                {% endfor %}
+                            </tbody>
+                        </table>
+                    </div>
+                </div>
+            </div>
+            {% endif %}
         </div>
     </div>
 </div>
@@ -555,29 +615,128 @@
     box-shadow: 0 2px 8px rgba(0,0,0,0.1);
 }
 
+/* Dark mode for task details */
+[data-theme="dark"] .task-detail-item {
+    background-color: #0f172a;
+}
+[data-theme="dark"] .task-detail-item:hover {
+    background-color: #0b1220;
+}
+[data-theme="dark"] .timeline::before { background-color: #1f2937; }
+[data-theme="dark"] .timeline-marker { box-shadow: 0 0 0 2px #1f2937; }
+[data-theme="dark"] .card.mobile-card .card-header h6 { color: #e5e7eb; }
+
 .btn:hover {
     transform: translateY(-1px);
     box-shadow: 0 4px 12px rgba(0,0,0,0.15);
 }
 </style>
+<style>
+/* Quick actions: prevent full-width buttons, improve spacing */
+.quick-actions .btn { width: auto; }
+@media (max-width: 768px) {
+    .quick-actions { gap: 0.5rem; }
+}
+</style>
 
 <script>
 function updateTaskStatus(status) {
-    if (confirm('Are you sure you want to update the task status?')) {
-        // Simple form submission approach instead of fetch with CSRF token
-        const form = document.createElement('form');
-        form.method = 'POST';
-        form.action = '{{ url_for("tasks.update_task_status", task_id=task.id) }}';
-        
-        const statusInput = document.createElement('input');
-        statusInput.type = 'hidden';
-        statusInput.name = 'status';
-        statusInput.value = status;
-        
-        form.appendChild(statusInput);
-        document.body.appendChild(form);
-        form.submit();
+    // Build and submit form without default confirm
+    const form = document.createElement('form');
+    form.method = 'POST';
+    form.action = '{{ url_for("tasks.update_task_status", task_id=task.id) }}';
+
+    const statusInput = document.createElement('input');
+    statusInput.type = 'hidden';
+    statusInput.name = 'status';
+    statusInput.value = status;
+
+    form.appendChild(statusInput);
+    document.body.appendChild(form);
+    form.submit();
+}
+
+function toggleEntries() { /* deprecated - replaced by showMoreEntries/showLessEntries */ }
+
+document.addEventListener('DOMContentLoaded', function() {
+    const rows = document.querySelectorAll('#timeEntriesTableBody tr');
+    const total = rows.length;
+    const initial = Math.min(10, total);
+    rows.forEach((row, idx) => row.style.display = (idx < initial ? '' : 'none'));
+    const info = document.getElementById('entriesInfo');
+    if (info && total > 10) info.textContent = `Showing ${initial} of ${total} entries`;
+
+    // Initialize tooltips
+    const tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'))
+    tooltipTriggerList.forEach(function (tooltipTriggerEl) {
+        new bootstrap.Tooltip(tooltipTriggerEl)
+    })
+});
+
+// Quick Action Modal
+let pendingStatus = null;
+function openStatusModal(status) {
+    pendingStatus = status;
+    const titleMap = {
+        'in_progress': 'Start Task',
+        'review': 'Mark for Review',
+        'todo': 'Pause / Reopen Task',
+        'done': 'Complete Task',
+        'cancelled': 'Cancel Task'
+    };
+    const bodyMap = {
+        'in_progress': 'Are you sure you want to start this task now?',
+        'review': 'Move this task to Review?',
+        'todo': 'Move this task to To Do?',
+        'done': 'Mark this task as Completed?',
+        'cancelled': 'Cancel this task? You can reopen it later.'
+    };
+
+    const modalEl = document.getElementById('statusConfirmModal');
+    modalEl.querySelector('.modal-title').textContent = titleMap[status] || 'Confirm Action';
+    modalEl.querySelector('.modal-body-text').textContent = bodyMap[status] || 'Are you sure?';
+    const modal = new bootstrap.Modal(modalEl);
+    modal.show();
+}
+
+function confirmStatusChange() {
+    if (!pendingStatus) return;
+    const btn = document.getElementById('statusConfirmBtn');
+    if (btn) {
+        btn.disabled = true;
+        btn.innerHTML = '<i class="fas fa-spinner fa-spin me-2"></i>Working...';
     }
+    updateTaskStatus(pendingStatus);
+}
+
+// Progressive show more/less for time entries
+function showMoreEntries() {
+    const rows = Array.from(document.querySelectorAll('#timeEntriesTableBody tr'));
+    const info = document.getElementById('entriesInfo');
+    const showMoreBtn = document.getElementById('showMoreBtn');
+    const showLessBtn = document.getElementById('showLessBtn');
+    const currentlyVisible = rows.filter(r => r.style.display !== 'none').length;
+    const toShow = Math.min(currentlyVisible + 10, rows.length);
+    rows.forEach((row, idx) => row.style.display = (idx < toShow ? '' : 'none'));
+    if (info) info.textContent = (toShow < rows.length) ? `Showing ${toShow} of ${rows.length} entries` : `Showing all ${rows.length} entries`;
+    if (toShow >= rows.length) {
+        showMoreBtn.classList.add('d-none');
+        showLessBtn.classList.remove('d-none');
+    } else {
+        showLessBtn.classList.remove('d-none');
+    }
+}
+
+function showLessEntries() {
+    const rows = Array.from(document.querySelectorAll('#timeEntriesTableBody tr'));
+    const info = document.getElementById('entriesInfo');
+    const showMoreBtn = document.getElementById('showMoreBtn');
+    const showLessBtn = document.getElementById('showLessBtn');
+    const initial = Math.min(10, rows.length);
+    rows.forEach((row, idx) => row.style.display = (idx < initial ? '' : 'none'));
+    if (info) info.textContent = `Showing ${initial} of ${rows.length} entries`;
+    showMoreBtn.classList.remove('d-none');
+    showLessBtn.classList.add('d-none');
 }
 
 // Function to show delete time entry modal
@@ -607,6 +766,29 @@ document.addEventListener('DOMContentLoaded', function() {
 });
 </script>
 
+<!-- Status Confirm Modal -->
+<div class="modal fade" id="statusConfirmModal" tabindex="-1" aria-hidden="true">
+    <div class="modal-dialog modal-dialog-centered">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h5 class="modal-title">Confirm Action</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+            </div>
+            <div class="modal-body">
+                <p class="modal-body-text">Are you sure?</p>
+            </div>
+            <div class="modal-footer">
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">
+                    <i class="fas fa-times me-2"></i>Cancel
+                </button>
+                <button type="button" id="statusConfirmBtn" class="btn btn-primary" onclick="confirmStatusChange()">
+                    <i class="fas fa-check me-2"></i>Confirm
+                </button>
+            </div>
+        </div>
+    </div>
+    </div>
+
 <!-- Delete Time Entry Modal -->
 <div class="modal fade" id="deleteEntryModal" tabindex="-1">
     <div class="modal-dialog modal-dialog-centered">

app/utils/template_filters.py

@@ -1,5 +1,11 @@
 from flask import Blueprint
 from app.utils.timezone import utc_to_local, format_local_datetime
+try:
+    import markdown as _md
+    import bleach
+except Exception:
+    _md = None
+    bleach = None
 
 def register_template_filters(app):
     """Register custom template filters for the application"""
@@ -38,3 +44,27 @@ def register_template_filters(app):
         if text is None:
             return ""
         return text.replace('\n', '<br>')
+
+    @app.template_filter('markdown')
+    def markdown_filter(text):
+        """Render markdown to safe HTML using bleach sanitation."""
+        if not text:
+            return ""
+        if _md is None:
+            # Fallback: escape and basic nl2br
+            try:
+                from markupsafe import escape
+            except Exception:
+                return text
+            return escape(text).replace('\n', '<br>')
+
+        html = _md.markdown(text, extensions=['extra', 'sane_lists', 'smarty'])
+        if bleach is None:
+            return html
+        allowed_tags = bleach.sanitizer.ALLOWED_TAGS.union({'p','pre','code','img','h1','h2','h3','h4','h5','h6','table','thead','tbody','tr','th','td','hr','br','ul','ol','li','strong','em','blockquote','a'})
+        allowed_attrs = {
+            **bleach.sanitizer.ALLOWED_ATTRIBUTES,
+            'a': ['href', 'title', 'rel', 'target'],
+            'img': ['src', 'alt', 'title'],
+        }
+        return bleach.clean(html, tags=allowed_tags, attributes=allowed_attrs, strip=True)

migrations/versions/004_add_task_activities_table.py

@@ -0,0 +1,44 @@
+"""add task_activities table
+
+Revision ID: 004
+Revises: 003
+Create Date: 2025-09-07 10:35:00
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '004'
+down_revision = '003'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        'task_activities',
+        sa.Column('id', sa.Integer(), primary_key=True),
+        sa.Column('task_id', sa.Integer(), sa.ForeignKey('tasks.id', ondelete='CASCADE'), nullable=False, index=True),
+        sa.Column('user_id', sa.Integer(), sa.ForeignKey('users.id', ondelete='SET NULL'), nullable=True, index=True),
+        sa.Column('event', sa.String(length=50), nullable=False, index=True),
+        sa.Column('details', sa.Text(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.text('CURRENT_TIMESTAMP')),
+    )
+
+    # Explicit indexes (in addition to inline index=True for portability)
+    op.create_index('idx_task_activities_task_id', 'task_activities', ['task_id'])
+    op.create_index('idx_task_activities_user_id', 'task_activities', ['user_id'])
+    op.create_index('idx_task_activities_event', 'task_activities', ['event'])
+    op.create_index('idx_task_activities_created_at', 'task_activities', ['created_at'])
+
+
+def downgrade() -> None:
+    op.drop_index('idx_task_activities_created_at', table_name='task_activities')
+    op.drop_index('idx_task_activities_event', table_name='task_activities')
+    op.drop_index('idx_task_activities_user_id', table_name='task_activities')
+    op.drop_index('idx_task_activities_task_id', table_name='task_activities')
+    op.drop_table('task_activities')
+
+

requirements.txt

@@ -37,3 +37,5 @@ flake8==6.1.0
 
 # Security
 cryptography==45.0.6
+markdown==3.6
+bleach==6.1.0