onyx-tasks/PLAN.md

# Bevy Tasks - Project Plan

## Vision

A **local-first, cross-platform tasks application** inspired by Google Tasks. Built with Rust for high performance and true native support across Windows, Linux, macOS, iOS, and Android.

**Core Principles**:
- **Local-First**: Your data, your folder, your control
- **Fast**: Sub-second startup, instant response
- **Cross-Platform**: Single codebase, all platforms
- **Flexible**: Multiple workspaces for different contexts (personal, shared, work, etc.)

**Data Format**: Tasks stored as markdown files with YAML frontmatter (Obsidian-compatible)
**Storage**: User selects folder location for each workspace (e.g., `~/Documents/Tasks`, `~/Dropbox/TeamTasks`)
**Sync**: Optional per-workspace WebDAV for cross-device synchronization
**Architecture**: Backend/frontend separation with CLI-first development

---

## Resources

- [Bevy Documentation](https://bevyengine.org/)
- [egui Documentation](https://docs.rs/egui/)
- [WebDAV RFC 4918](https://datatracker.ietf.org/doc/html/rfc4918)
- [Google Tasks API](https://developers.google.com/tasks) (for importer reference)

---

## Phase 1: Core Library & CLI MVP

**Goal**: Build and validate the backend with a functional CLI

### Why CLI First?
- Test backend thoroughly before GUI complexity
- CLI useful for power users and automation
- Clean API boundaries
- Easy to write comprehensive tests

### Architecture

#### Cargo Workspace Structure
```
bevy-tasks/
├── Cargo.toml                    # Workspace definition
├── PLAN.md
├── README.md
├── crates/
│   ├── bevy-tasks-core/          # Core library (backend)
│   ├── bevy-tasks-cli/           # CLI frontend
│   └── bevy-tasks-gui/           # GUI frontend (Phase 3+)
└── docs/
```

#### Data Model

Tasks are stored as individual `.md` files with YAML frontmatter:

```markdown
---
id: 550e8400-e29b-41d4-a716-446655440000
status: backlog
due: 2025-11-15T14:00:00Z
created: 2025-10-26T10:00:00Z
updated: 2025-10-26T12:30:00Z
parent: 550e8400-e29b-41d4-a716-446655440001
---

Task description and notes go here in **markdown** format.

- Can include lists
- Rich formatting
- Links, etc.
```

**TaskStatus values**:
- `backlog` - Task not yet completed
- `completed` - Task is done

**In-Memory Model**:
```rust
Task {
    id: Uuid,
    title: String,              // Derived from filename (without .md extension)
    description: String,              // Markdown content
    status: TaskStatus,         // Backlog or Completed
    due_date: Option<DateTime>,
    created_at: DateTime,
    updated_at: DateTime,
    parent_id: Option<Uuid>,    // For subtasks
}

enum TaskStatus {
    Backlog,     // Not yet completed
    Completed,   // Done
}

TaskList {
    id: Uuid,
    title: String,              // Derived from folder name
    tasks: Vec<Task>,           // Ordered by task_order, optionally grouped by due date
    created_at: DateTime,
    updated_at: DateTime,
    group_by_due_date: bool,    // If true, group by due date before applying task_order
}

AppConfig {
    workspaces: HashMap<String, WorkspaceConfig>,
    current_workspace: Option<String>,
}

WorkspaceConfig {
    path: PathBuf,
}
```

#### File System Structure

```
~/Documents/Tasks/           # User-selected folder
├── .metadata.json           # Global: list ordering, last opened list
├── My Tasks/                # Task list folder
│   ├── .listdata.json       # List metadata: task order, id, timestamps
│   ├── Buy groceries.md     # Title: "Buy groceries" (without .md)
│   └── Call dentist.md      # Title: "Call dentist" (without .md)
└── Work/                    # Another task list
    ├── .listdata.json
    ├── Review PRs.md        # Title: "Review PRs" (without .md)
    └── Team meeting prep.md # Title: "Team meeting prep" (without .md)
```

**Note**: Task titles are derived from filenames by removing the `.md` extension.

**`.metadata.json` (root level)**:
```json
{
  "version": 1,
  "list_order": ["list-uuid-1", "list-uuid-2"],
  "last_opened_list": "list-uuid-1"
}
```

**`.listdata.json` (per list)**:
```json
{
  "id": "list-uuid-1",
  "created_at": "2025-10-26T10:00:00Z",
  "updated_at": "2025-10-27T14:30:00Z",
  "group_by_due_date": false,
  "task_order": [
    "task-uuid-1",
    "task-uuid-2",
    "task-uuid-3"
  ]
}
```

**Task Ordering**:
- Tasks are always ordered according to the `task_order` array (manual ordering)
- When `group_by_due_date` is `true`, tasks are first grouped by their due date, then sorted within each group by `task_order`
- Tasks without due dates appear at the end when grouping is enabled

**App Configuration** (separate from task data, supports multiple workspaces):
- Windows: `%APPDATA%/bevy-tasks/config.json`
- Linux: `~/.config/bevy-tasks/config.json`
- macOS: `~/Library/Application Support/bevy-tasks/config.json`

```json
{
  "workspaces": {
    "personal": {
      "path": "/home/user/Documents/Tasks"
    },
    "shared": {
      "path": "/home/user/Dropbox/TeamTasks"
    }
  },
  "current_workspace": "personal"
}
```

#### Core Library API

```rust
pub struct TaskRepository {
    storage: Box<dyn Storage>,
}

impl TaskRepository {
    pub fn new(tasks_folder: PathBuf) -> Result<Self>;
    pub fn init(tasks_folder: PathBuf) -> Result<Self>;

    // Task operations
    pub fn create_task(&mut self, list_id: Uuid, task: Task) -> Result<Task>;
    pub fn get_task(&self, id: Uuid) -> Result<Task>;
    pub fn update_task(&mut self, task: Task) -> Result<()>;
    pub fn delete_task(&mut self, id: Uuid) -> Result<()>;
    pub fn list_tasks(&self, list_id: Uuid) -> Result<Vec<Task>>;

    // List operations
    pub fn create_list(&mut self, name: String) -> Result<TaskList>;
    pub fn get_lists(&self) -> Result<Vec<TaskList>>;
    pub fn delete_list(&mut self, id: Uuid) -> Result<()>;

    // Task ordering (modifies .listdata.json)
    pub fn reorder_task(&mut self, list_id: Uuid, task_id: Uuid, new_position: usize) -> Result<()>;
    pub fn get_task_order(&self, list_id: Uuid) -> Result<Vec<Uuid>>;

    // Grouping preference (modifies .listdata.json)
    pub fn set_group_by_due_date(&mut self, list_id: Uuid, enabled: bool) -> Result<()>;
    pub fn get_group_by_due_date(&self, list_id: Uuid) -> Result<bool>;
}

pub trait Storage {
    fn read_task(&self, list_id: Uuid, task_id: Uuid) -> Result<Task>;
    fn write_task(&mut self, list_id: Uuid, task: &Task) -> Result<()>;
    // ... more methods
}
```

### Dependencies

**Workspace Cargo.toml**:
```toml
[workspace]
members = [
    "crates/bevy-tasks-core",
    "crates/bevy-tasks-cli",
    "crates/bevy-tasks-gui",
]
resolver = "2"

[workspace.dependencies]
serde = { version = "1.0", features = ["derive"] }
uuid = { version = "1.0", features = ["serde", "v4"] }
chrono = { version = "0.4", features = ["serde"] }
anyhow = "1.0"
tokio = { version = "1.40", features = ["full"] }
```

**bevy-tasks-core/Cargo.toml**:
```toml
[package]
name = "bevy-tasks-core"
version = "0.1.0"
edition = "2024"

[dependencies]
serde = { workspace = true }
serde_json = "1.0"
serde_yaml = "0.9"        # YAML frontmatter
pulldown-cmark = "0.12"   # Markdown parsing
uuid = { workspace = true }
chrono = { workspace = true }
directories = "5.0"
anyhow = { workspace = true }

[dev-dependencies]
tempfile = "3.0"
```

**bevy-tasks-cli/Cargo.toml**:
```toml
[package]
name = "bevy-tasks-cli"
version = "0.1.0"
edition = "2024"

[[bin]]
name = "bevy-tasks"
path = "src/main.rs"

[dependencies]
bevy-tasks-core = { path = "../bevy-tasks-core" }
clap = { version = "4.5", features = ["derive", "env"] }
colored = "2.0"
indicatif = "0.17"
anyhow = { workspace = true }
tokio = { workspace = true }
```

### Features

- [ ] Cargo workspace setup
- [ ] Data models (Task, TaskList, AppConfig, WorkspaceConfig)
- [ ] Markdown file I/O with YAML frontmatter parsing
- [ ] Local storage implementation
- [ ] Repository pattern and public API
- [ ] Multiple workspace support
- [ ] CLI: `init` command (create named workspace)
- [ ] CLI: `workspace add` command (add additional workspaces)
- [ ] CLI: `workspace list` command (view all workspaces)
- [ ] CLI: `workspace switch` command (change current workspace)
- [ ] CLI: `workspace remove` command (delete workspace)
- [ ] CLI: `workspace retarget` command (update workspace path without moving files)
- [ ] CLI: `workspace migrate` command (move files to new location)
- [ ] CLI: `list create` command (create new task lists)
- [ ] CLI: `list` command (view tasks)
- [ ] CLI: `add` command (create tasks)
- [ ] CLI: `complete` command (mark done)
- [ ] CLI: `delete` command (remove tasks)
- [ ] CLI: `edit` command (modify tasks - CLI only, creates temp file)
- [ ] Manual task ordering (always via task_order array)
- [ ] CLI: `group` command (toggle group-by-due-date for a list)
- [ ] Support for `--workspace` flag on all commands
- [ ] Comprehensive unit and integration tests (>80% coverage)

### CLI Usage Examples

```bash
# First run: initialize a workspace (creates named workspace)
$ bevy-tasks init ~/Documents/Tasks --name personal
✓ Initialized workspace "personal" at ~/Documents/Tasks
✓ Created default list "My Tasks"
✓ Set "personal" as current workspace

# Add more workspaces (e.g., for shared/collaborative tasks)
$ bevy-tasks workspace add shared ~/Dropbox/TeamTasks
✓ Added workspace "shared" at ~/Dropbox/TeamTasks
✓ Created default list "My Tasks"

# List all workspaces
$ bevy-tasks workspace list
  personal: ~/Documents/Tasks (current)
  shared: ~/Dropbox/TeamTasks

# Switch between workspaces
$ bevy-tasks workspace switch shared
✓ Switched to workspace "shared"

# Create a new task list
$ bevy-tasks list create "Work"
✓ Created list "Work"

$ bevy-tasks list create "Personal Projects"
✓ Created list "Personal Projects"

# Add tasks (uses current workspace by default)
$ bevy-tasks add "Buy groceries"
✓ Created task "Buy groceries" (550e8400-e29b-41d4-a716-446655440000)

$ bevy-tasks add "Review PR #123" --list "Work" --due "2025-11-15"
✓ Created task "Review PR #123" (7f3a9c21-b8d2-4e5f-9a1c-3d8e7f6a2b1c)
  Due: 2025-11-15

# Or specify workspace explicitly
$ bevy-tasks add "Team meeting" --workspace shared
✓ Created task "Team meeting" in workspace "shared"

# List all tasks (from current workspace)
$ bevy-tasks list
My Tasks (3 tasks)
  [ ] Buy groceries
  [ ] Call dentist
  [✓] Pay bills

Work (2 tasks)
  [ ] Review PR #123 (due: 2025-11-15)
  [ ] Team meeting prep

# List tasks from specific workspace
$ bevy-tasks list --workspace shared
Shared Tasks (2 tasks)
  [ ] Team meeting
  [ ] Quarterly planning

# List tasks in specific list
$ bevy-tasks list --list "Work"
Work (2 tasks)
  [ ] Review PR #123 (due: 2025-11-15)
  [ ] Team meeting prep

# Complete a task
$ bevy-tasks complete 550e8400-e29b-41d4-a716-446655440000
✓ Completed task "Buy groceries"

# Edit a task (CLI-only: creates temp file, opens $EDITOR, blocks until editor exits, then parses)
$ bevy-tasks edit 7f3a9c21-b8d2-4e5f-9a1c-3d8e7f6a2b1c
# Opens editor with task markdown file
# User edits and saves, then exits editor
✓ Updated task "Review PR #123"

# Delete a task
$ bevy-tasks delete 550e8400-e29b-41d4-a716-446655440000
✓ Deleted task "Buy groceries"

# Retarget workspace (files already at new location, just update config)
$ bevy-tasks workspace retarget personal ~/new/path/to/Tasks
✓ Workspace "personal" now points to ~/new/path/to/Tasks

# Migrate workspace (move files to new location)
$ bevy-tasks workspace migrate personal ~/Dropbox/Tasks
⚠ This will move all files from ~/Documents/Tasks to ~/Dropbox/Tasks
Continue? (y/n): y
Moving files...
  Moved .metadata.json
  Moved My Tasks/ (15 files)
  Moved Work/ (8 files)
✓ Migrated 23 files to ~/Dropbox/Tasks
✓ Workspace "personal" now points to ~/Dropbox/Tasks

# Remove a workspace
$ bevy-tasks workspace remove shared
⚠ Warning: This will delete workspace config (files remain on disk)
Continue? (y/n): y
✓ Removed workspace "shared"

# Toggle grouping by due date (tasks always use manual task_order within groups)
$ bevy-tasks group enable --list "Work"
✓ Enabled group-by-due-date for list "Work"

$ bevy-tasks group disable --list "Personal"
✓ Disabled group-by-due-date for list "Personal"
```

### Deliverables

- [ ] `bevy-tasks-core` library with stable API
- [ ] Functional CLI that can manage tasks
- [ ] Data persists as Obsidian-compatible .md files
- [ ] Well-tested backend (>80% coverage)
- [ ] Documentation for core library API

### Development Setup

```bash
# Clone and build
git clone <repository-url>
cd bevy-tasks
cargo build

# Run tests
cargo test -p bevy-tasks-core

# Run CLI
cargo run -p bevy-tasks-cli -- init ~/test-tasks --name test
cargo run -p bevy-tasks-cli -- add "Test task"
cargo run -p bevy-tasks-cli -- list
cargo run -p bevy-tasks-cli -- workspace list
```

---

## Phase 2: WebDAV Sync (Backend + CLI)

**Goal**: Enable cross-device synchronization via CLI

### Architecture

#### WebDAV Integration

Add WebDAV support to `bevy-tasks-core`:

```rust
// Update WorkspaceConfig to include WebDAV
WorkspaceConfig {
    path: PathBuf,
    webdav_url: Option<String>,
    last_sync: Option<DateTime>,
}

// AppConfig remains the same (workspaces + current_workspace)
AppConfig {
    workspaces: HashMap<String, WorkspaceConfig>,
    current_workspace: Option<String>,
}

// Add sync methods to TaskRepository
impl TaskRepository {
    pub fn sync_push(&mut self) -> Result<SyncResult>;
    pub fn sync_pull(&mut self) -> Result<SyncResult>;
    pub fn sync_status(&self) -> Result<SyncStatus>;
}
```

#### Sync Strategy
- **Trigger**: On app start (if connected), background timer (every 5 min), on modification (debounced)
- **Conflict Resolution**: Last-write-wins with timestamp
- **Offline Support**: Queue operations when offline, sync when online

#### Authentication

**Primary**: Platform Keychain via `keyring` crate
- Store WebDAV username + password in system keychain
- Key format: `com.bevy-tasks.webdav.{server-domain}`
- Works on: Windows (Credential Manager), macOS (Keychain), Linux (Secret Service), iOS/Android (Keystore)

**Fallback**: Encrypted local storage if keychain unavailable

### Dependencies

Add to `bevy-tasks-core/Cargo.toml`:
```toml
reqwest = { version = "0.12", features = ["json", "rustls-tls"] }
keyring = "3.0"
# TODO: Evaluate dav-client or implement custom WebDAV
```

### Features

- [ ] WebDAV client implementation in core library
- [ ] Credential storage (platform keychain)
- [ ] Bi-directional sync (push/pull)
- [ ] Conflict resolution (last-write-wins)
- [ ] Offline queue for pending operations
- [ ] CLI: `sync --setup` command
- [ ] CLI: `sync --push` command
- [ ] CLI: `sync --pull` command
- [ ] CLI: `sync --status` command
- [ ] Progress indicators for sync operations

### CLI Usage Examples

```bash
# Setup WebDAV for current workspace
$ bevy-tasks sync --setup
WebDAV URL: https://nextcloud.example.com/remote.php/dav/files/username/Tasks
Username: myuser
Password: ********
✓ WebDAV credentials saved to system keychain
✓ Connection verified for workspace "personal"

# Setup WebDAV for specific workspace
$ bevy-tasks sync --setup --workspace shared
WebDAV URL: https://nextcloud.example.com/remote.php/dav/files/username/SharedTasks
Username: myuser
Password: ********
✓ WebDAV credentials saved to system keychain
✓ Connection verified for workspace "shared"

# Push local changes to WebDAV server (current workspace)
$ bevy-tasks sync --push
Syncing workspace "personal" to https://nextcloud.example.com/...
  Uploading My Tasks/.listdata.json
  Uploading My Tasks/Buy groceries.md
  Uploading Work/Review PR #123.md
✓ Pushed 3 files to WebDAV server

# Pull changes from WebDAV server
$ bevy-tasks sync --pull
Syncing workspace "personal" from https://nextcloud.example.com/...
  Downloading Work/Team meeting notes.md
  Downloading Personal/Call mom.md
✓ Pulled 2 files from WebDAV server

# Automatic two-way sync
$ bevy-tasks sync
Syncing workspace "personal" with https://nextcloud.example.com/...
  ↑ Uploading My Tasks/New task.md
  ↓ Downloading Work/Updated task.md
  = No changes for 15 files
✓ Sync complete

# Sync specific workspace
$ bevy-tasks sync --workspace shared
Syncing workspace "shared" with https://nextcloud.example.com/...
✓ Sync complete (no changes)

# Check sync status for current workspace
$ bevy-tasks sync --status
Workspace: personal
WebDAV Server: https://nextcloud.example.com/remote.php/dav/files/username/Tasks
Status: Connected
Last sync: 2025-10-27 14:32:15
Local changes: 2 files modified
Remote changes: 0 files modified

# Check sync status for all workspaces
$ bevy-tasks sync --status --all
Workspace: personal
  WebDAV: https://nextcloud.example.com/.../Tasks
  Status: Connected
  Last sync: 2025-10-27 14:32:15

Workspace: shared
  WebDAV: https://nextcloud.example.com/.../SharedTasks
  Status: Connected
  Last sync: 2025-10-27 14:28:42
```

### Deliverables

- [ ] Working WebDAV sync in backend
- [ ] CLI can sync with remote WebDAV server
- [ ] Reliable conflict resolution
- [ ] Tested with Nextcloud, ownCloud

---

## Phase 3: GUI MVP (Desktop)

**Goal**: Build graphical interface on desktop platforms

### Architecture

#### Frontend Framework: egui

**Decision**: Use egui (immediate mode GUI) for MVP

**Why egui?**
- Fast development with rich built-in widgets
- Excellent text editing support out of the box
- Small binary size (~2-3MB stripped)
- Fast startup time (100-200ms target)
- Mature and stable
- Simple immediate-mode API
- Cross-platform (desktop AND mobile)
- Easy integration with `bevy-tasks-core`

#### GUI Crate Structure

```
crates/bevy-tasks-gui/
├── Cargo.toml
├── src/
│   ├── main.rs           # App entry point
│   ├── app.rs            # egui app setup
│   ├── ui/
│   │   ├── mod.rs
│   │   ├── screens/
│   │   │   ├── task_list.rs
│   │   │   ├── task_detail.rs
│   │   │   └── settings.rs
│   │   └── components/
│   │       ├── task_item.rs
│   │       ├── task_input.rs
│   │       └── list_selector.rs
│   └── state.rs          # UI state management
├── assets/
│   ├── fonts/
│   └── icons/
└── README.md
```

#### First Run Experience
- Show workspace setup dialog on first launch
- User creates first workspace with name and folder location
- User selects where to store tasks (e.g., `~/Documents/Tasks`)
- No default hidden directories
- Remember workspaces in app config

#### Workspace UI Elements
- Workspace selector dropdown in toolbar
- Quick-switch between workspaces
- Visual indicator of current workspace
- Settings panel to manage workspaces (add/remove/configure)

#### App Configuration (Phase 3+)

**Update AppConfig** to include UI preferences:
```rust
AppConfig {
    workspaces: HashMap<String, WorkspaceConfig>,  // From Phase 1
    current_workspace: Option<String>,
    theme: Theme,                    // NEW: light/dark mode
    window_size: Option<(u32, u32)>, // NEW: remember window size
    last_opened_list_per_workspace: HashMap<String, Uuid>,  // NEW: per-workspace last view
}

WorkspaceConfig {
    path: PathBuf,
    webdav_url: Option<String>,      // From Phase 2
    last_sync: Option<DateTime>,
}
```

### Dependencies

**bevy-tasks-gui/Cargo.toml**:
```toml
[package]
name = "bevy-tasks-gui"
version = "0.1.0"
edition = "2024"

[dependencies]
bevy-tasks-core = { path = "../bevy-tasks-core" }
anyhow = { workspace = true }

# egui for Phase 3-6
eframe = "0.31"  # egui framework with native windowing
egui = "0.31"    # Core egui library
```

### Performance Strategy

**Startup Sequence**:
1. Initialize eframe window (< 50ms)
2. Load config from disk (< 20ms)
3. Render empty UI (first frame < 100ms)
4. Load current task list in background
5. Update UI as tasks load
6. Start WebDAV sync in background (if configured)

**Target**: < 200ms cold start on desktop

**Optimizations**:
- Lazy data loading (load visible tasks first)
- Background operations for sync
- Efficient file I/O (stream large files)
- Minimal dependencies

### Features

- [ ] egui framework integration
- [ ] Workspace setup dialog on first launch
- [ ] Workspace selector in toolbar
- [ ] Quick-switch between workspaces
- [ ] Basic task list view
- [ ] Create new tasks
- [ ] Edit existing tasks
- [ ] Delete tasks
- [ ] Mark tasks complete/incomplete
- [ ] Settings screen (manage workspaces, WebDAV config)
- [ ] Sync status indicators (per workspace)
- [ ] Desktop support (Windows, Linux, macOS)

### Deliverables

- [ ] Functional desktop GUI app
- [ ] Sub-200ms startup time
- [ ] Clean, minimal UI
- [ ] Feature parity with CLI

### Build & Release

**Distribution**:
- Linux: AppImage, .tar.gz
- macOS: DMG
- Windows: MSI, portable .exe

**CI/CD**: GitHub Actions for automated builds

---

## Phase 4: Mobile Basic Support

**Goal**: Get app running on iOS and Android ASAP, validate architecture

### Why Early Mobile?
- De-risk mobile builds early in development
- Test cross-platform architecture sooner
- Validate egui on mobile
- Get mobile-specific feedback early
- Can dogfood on mobile while building desktop features

### Architecture

#### Mobile Build Setup

**iOS**:
- Use Xcode for builds
- Target: `aarch64-apple-ios`
- Bundle identifier: `com.bevy-tasks`

**Android**:
- Use Android SDK/NDK
- Build with `cargo-apk` or `cargo-ndk`
- Min SDK: 26 (Android 8.0)

#### egui Mobile Adaptation

**Touch Support**:
- egui has basic touch support
- Add larger touch targets (44pt minimum)
- Test on real devices

**File System Access**:
- iOS: App sandbox documents directory + file picker
- Android: Scoped storage + SAF (Storage Access Framework)

#### First Run on Mobile
- Show folder picker on first launch
- Suggest locations: Documents, iCloud Drive (iOS), Google Drive (Android)
- User selects folder, path stored in preferences

### Platform-Specific Code

```rust
#[cfg(target_os = "ios")]
mod ios {
    // iOS-specific file picker, etc.
}

#[cfg(target_os = "android")]
mod android {
    // Android-specific file picker, etc.
}
```

### Features

- [ ] iOS build pipeline setup (Xcode project)
- [ ] Android build pipeline setup (Gradle/NDK)
- [ ] Basic egui mobile adaptation
- [ ] Simple test UI (even just buttons for CRUD)
- [ ] File system access on iOS
- [ ] File system access on Android
- [ ] Folder picker for mobile
- [ ] Basic task CRUD on mobile
- [ ] Test on real devices

### Deliverables

- [ ] App launches on iOS
- [ ] App launches on Android
- [ ] Can create and view tasks on mobile
- [ ] Validates cross-platform architecture
- [ ] Foundation for future mobile polish

### Distribution

- iOS: .ipa for TestFlight (early access)
- Android: .apk (direct install / sideloading)

**Note**: This phase prioritizes getting mobile working, even with a simple UI. Polish comes in Phase 6.

---

## Phase 5: GUI Advanced Features (Desktop + Mobile)

**Goal**: Feature parity with Google Tasks across all platforms

### Features

#### Desktop & Mobile
- [ ] Multiple task lists (folders)
- [ ] Switch between lists
- [ ] Subtasks support
- [ ] Due dates with date picker
- [ ] Rich markdown editor for task notes
- [ ] Move tasks between lists
- [ ] Change storage folder location in settings
- [ ] Search functionality
- [ ] Theme selection (light/dark mode)

#### Desktop-Specific
- [ ] Drag & drop reordering
- [ ] Keyboard shortcuts
- [ ] Multiple windows (optional)

#### Mobile-Specific
- [ ] Swipe gestures (swipe to complete, swipe to delete)
- [ ] Pull-to-refresh
- [ ] Touch-optimized UI elements
- [ ] Larger touch targets

### Deliverables

- [ ] Full-featured task manager on all platforms
- [ ] Polished UX on desktop
- [ ] Touch-optimized UX on mobile
- [ ] Consistent feature set across platforms

---

## Phase 6: Mobile Polish & Platform-Specific Features

**Goal**: Native mobile experience and deep platform integration

### Features

#### iOS-Specific
- [ ] Share extension (share to tasks)
- [ ] iOS widgets (home screen, lock screen)
- [ ] Siri shortcuts
- [ ] Haptic feedback
- [ ] iOS-native gestures
- [ ] App icon badge with task count
- [ ] Quick capture via 3D touch / long press
- [ ] iCloud Drive integration

#### Android-Specific
- [ ] Share target (share to tasks)
- [ ] Android widgets (home screen)
- [ ] Quick settings tile
- [ ] Haptic feedback
- [ ] Material Design guidelines
- [ ] Google Drive integration

#### Both Platforms
- [ ] Background sync on mobile
- [ ] Push notifications for due dates
- [ ] Notification actions (complete from notification)
- [ ] App shortcuts
- [ ] Platform-specific animations

### Deliverables

- [ ] Native-feeling mobile apps
- [ ] Deep platform integration
- [ ] Mobile-specific features

### Distribution

**App Store Distribution**:
- iOS: Apple App Store
- Android: Google Play Store
- Android: F-Droid (FOSS store)

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## Phase 7: Advanced Features & Imports

**Goal**: Differentiate from Google Tasks, add unique features

### Features

#### Google Tasks Importer
- [ ] **Import from Google Tasks** (via API or export)
- [ ] Migrate tasks, lists, due dates, notes
- [ ] Preserve task hierarchy and order
- [ ] Easy onboarding for Google Tasks users

#### Advanced Task Management
- [ ] **Recurring tasks** (tasks that automatically uncomplete and reschedule)
  - When completed, task automatically returns to backlog
  - Due date updates by specified interval (e.g., +1 day, +1 week, +1 month)
  - Intervals: daily, weekly, monthly, yearly, custom (e.g., "every 3 days")
  - Optional: limit number of repetitions or end date
  - Stored in frontmatter: `recurs: "daily"`, `recurs_until: "2026-01-01"`
- [ ] Task templates (save common tasks)
- [ ] Bulk operations (select multiple, bulk edit)
- [ ] Full-text search across all tasks
- [ ] Filters and smart lists (e.g., "Due this week")
- [ ] Statistics and insights (completion rate, etc.)

#### Integration & Automation
- [ ] Calendar integration (view tasks in calendar)
- [ ] Email to task (send email to create task)
- [ ] Voice input (speech-to-text for tasks)
- [ ] URL schemes / deep links
- [ ] Zapier integration (optional)

#### Collaboration (Optional)
- [ ] Share lists with other users
- [ ] Collaborative editing
- [ ] Comments on tasks
- [ ] Activity log

#### Customization & Polish
- [ ] Custom themes and color schemes
- [ ] Advanced animations (consider Bevy migration)
- [ ] Plugin system for extensions (optional)
- [ ] Custom fonts
- [ ] Export/import (backup/restore to .zip)

### Optional: Bevy Migration

If you want game-like polish after Phase 7:
- Migrate GUI from egui to Bevy
- Full control over animations and rendering
- Unique, polished look beyond standard apps
- Backend (`bevy-tasks-core`) stays identical
- Only rewrite `bevy-tasks-gui` crate

### Deliverables

- [ ] Polished, delightful UX
- [ ] Unique features not in Google Tasks
- [ ] Easy migration path from Google Tasks
- [ ] Distribution to all app stores

### Final Distribution

**All Platforms**:
- F-Droid (FOSS Android)
- Flathub (Linux Flatpak)
- Google Play Store (Android)
- Apple App Store (iOS and macOS)
- Microsoft Store (Windows)
- Direct downloads (all platforms)

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## License

[GNU General Public License v3.0 (GPL-3.0)](https://www.gnu.org/licenses/gpl-3.0.en.html)

This project is free and open-source software licensed under GPL v3.

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**Last Updated**: 2025-10-27
**Document Version**: 3.0
**Status**: Ready to Implement - Milestone-Driven Plan