feat: initialize k-tv-frontend with Next.js and Tailwind CSS

- Added package.json with dependencies and scripts for development, build, and linting.
- Created postcss.config.mjs for Tailwind CSS integration.
- Added SVG assets for UI components including file, globe, next, vercel, and window icons.
- Configured TypeScript with tsconfig.json for strict type checking and module resolution.

k-tv-backend/api/src/dto.rs

@@ -0,0 +1,184 @@
+//! Request and Response DTOs
+//!
+//! Data Transfer Objects for the API.
+//! Uses domain newtypes for validation instead of the validator crate.
+
+use chrono::{DateTime, Utc};
+use domain::{Email, Password};
+use serde::{Deserialize, Serialize};
+use uuid::Uuid;
+
+/// Login request with validated email and password newtypes
+#[derive(Debug, Deserialize)]
+pub struct LoginRequest {
+    /// Email is validated on deserialization
+    pub email: Email,
+    /// Password is validated on deserialization (min 8 chars)
+    pub password: Password,
+}
+
+/// Register request with validated email and password newtypes
+#[derive(Debug, Deserialize)]
+pub struct RegisterRequest {
+    /// Email is validated on deserialization
+    pub email: Email,
+    /// Password is validated on deserialization (min 8 chars)
+    pub password: Password,
+}
+
+/// User response DTO
+#[derive(Debug, Serialize)]
+pub struct UserResponse {
+    pub id: Uuid,
+    pub email: String,
+    pub created_at: DateTime<Utc>,
+}
+
+/// JWT token response
+#[derive(Debug, Serialize)]
+pub struct TokenResponse {
+    pub access_token: String,
+    pub token_type: String,
+    pub expires_in: u64,
+}
+
+/// System configuration response
+#[derive(Debug, Serialize)]
+pub struct ConfigResponse {
+    pub allow_registration: bool,
+}
+
+// ============================================================================
+// Channel DTOs
+// ============================================================================
+
+#[derive(Debug, Deserialize)]
+pub struct CreateChannelRequest {
+    pub name: String,
+    pub description: Option<String>,
+    /// IANA timezone, e.g. "UTC" or "America/New_York"
+    pub timezone: String,
+}
+
+/// All fields are optional — only provided fields are updated.
+#[derive(Debug, Deserialize)]
+pub struct UpdateChannelRequest {
+    pub name: Option<String>,
+    pub description: Option<String>,
+    pub timezone: Option<String>,
+    /// Replace the entire schedule config (template import/edit)
+    pub schedule_config: Option<domain::ScheduleConfig>,
+    pub recycle_policy: Option<domain::RecyclePolicy>,
+}
+
+#[derive(Debug, Serialize)]
+pub struct ChannelResponse {
+    pub id: Uuid,
+    pub owner_id: Uuid,
+    pub name: String,
+    pub description: Option<String>,
+    pub timezone: String,
+    pub schedule_config: domain::ScheduleConfig,
+    pub recycle_policy: domain::RecyclePolicy,
+    pub created_at: DateTime<Utc>,
+    pub updated_at: DateTime<Utc>,
+}
+
+impl From<domain::Channel> for ChannelResponse {
+    fn from(c: domain::Channel) -> Self {
+        Self {
+            id: c.id,
+            owner_id: c.owner_id,
+            name: c.name,
+            description: c.description,
+            timezone: c.timezone,
+            schedule_config: c.schedule_config,
+            recycle_policy: c.recycle_policy,
+            created_at: c.created_at,
+            updated_at: c.updated_at,
+        }
+    }
+}
+
+// ============================================================================
+// EPG / playback DTOs
+// ============================================================================
+
+#[derive(Debug, Serialize)]
+pub struct MediaItemResponse {
+    pub id: String,
+    pub title: String,
+    pub content_type: domain::ContentType,
+    pub duration_secs: u32,
+    pub genres: Vec<String>,
+    pub year: Option<u16>,
+    pub tags: Vec<String>,
+}
+
+impl From<domain::MediaItem> for MediaItemResponse {
+    fn from(i: domain::MediaItem) -> Self {
+        Self {
+            id: i.id.into_inner(),
+            title: i.title,
+            content_type: i.content_type,
+            duration_secs: i.duration_secs,
+            genres: i.genres,
+            year: i.year,
+            tags: i.tags,
+        }
+    }
+}
+
+#[derive(Debug, Serialize)]
+pub struct ScheduledSlotResponse {
+    pub id: Uuid,
+    pub start_at: DateTime<Utc>,
+    pub end_at: DateTime<Utc>,
+    pub item: MediaItemResponse,
+    pub source_block_id: Uuid,
+}
+
+impl From<domain::ScheduledSlot> for ScheduledSlotResponse {
+    fn from(s: domain::ScheduledSlot) -> Self {
+        Self {
+            id: s.id,
+            start_at: s.start_at,
+            end_at: s.end_at,
+            item: s.item.into(),
+            source_block_id: s.source_block_id,
+        }
+    }
+}
+
+/// What is currently playing on a channel.
+/// A 204 No Content response is returned instead when there is no active slot (no-signal).
+#[derive(Debug, Serialize)]
+pub struct CurrentBroadcastResponse {
+    pub slot: ScheduledSlotResponse,
+    /// Seconds elapsed since the start of the current item — use this as the
+    /// initial seek position for the player.
+    pub offset_secs: u32,
+}
+
+#[derive(Debug, Serialize)]
+pub struct ScheduleResponse {
+    pub id: Uuid,
+    pub channel_id: Uuid,
+    pub valid_from: DateTime<Utc>,
+    pub valid_until: DateTime<Utc>,
+    pub generation: u32,
+    pub slots: Vec<ScheduledSlotResponse>,
+}
+
+impl From<domain::GeneratedSchedule> for ScheduleResponse {
+    fn from(s: domain::GeneratedSchedule) -> Self {
+        Self {
+            id: s.id,
+            channel_id: s.channel_id,
+            valid_from: s.valid_from,
+            valid_until: s.valid_until,
+            generation: s.generation,
+            slots: s.slots.into_iter().map(Into::into).collect(),
+        }
+    }
+}