feat: add time tracking to all media types

Implements issue #57 with manual time entry functionality:
- Added timeSpent field (stored in minutes) to all media models
- Supports hours and minutes input in forms
- Displays formatted time on media cards

Database Schema:
- Added timeSpent Int? field to Game, Book, Music, Show, and Manga models
- Stored in minutes for consistency and easy calculation

Shared Types:
- Updated all media type interfaces with timeSpent? field
- Added to CreateDto and main interfaces for all media types

Frontend (Games - template for other types):
- Added hour/minute input fields to Add and Edit forms
- Split input with validation (minutes 0-59)
- Auto-calculates total minutes on change
- Formats display as "Xh Ym", "Xh", or "Ym" as appropriate
- Green highlighted time display on cards with ⏱️ icon
- Populates edit form from existing time data

Implementation Notes:
- Backend services require no changes (DTOs handle automatically)
- Time conversion helpers for display and storage
- Form state properly resets time fields
- Edit mode correctly splits minutes back to hours/minutes

Next Steps:
- Apply same UI pattern to Books, Music, Shows, Manga
- Add time statistics to user profiles
- Consider aggregate time tracking views

shared-types/src/lib/book.types.ts

@@ -29,6 +29,7 @@ interface Book {
   links:         Array<Link>;
   series?:       string;
   seriesOrder?:  number;
+  timeSpent?:    number;
   createdAt:     Date;
   updatedAt:     Date;
 }
@@ -47,6 +48,7 @@ interface CreateBookDto {
   links?:        Array<Link>;
   series?:       string;
   seriesOrder?:  number;
+  timeSpent?:    number;
 }
 
 interface UpdateBookDto extends Partial<CreateBookDto> {

shared-types/src/lib/game.types.ts

@@ -29,6 +29,7 @@ interface Game {
   links:          Array<Link>;
   series?:        string;
   seriesOrder?:   number;
+  timeSpent?:     number;
   createdAt:      Date;
   updatedAt:      Date;
 }
@@ -46,6 +47,7 @@ interface CreateGameDto {
   links?:        Array<Link>;
   series?:       string;
   seriesOrder?:  number;
+  timeSpent?:    number;
 }
 
 interface UpdateGameDto extends Partial<CreateGameDto> {

shared-types/src/lib/manga.types.ts

@@ -27,6 +27,7 @@ interface Manga {
   coverImage?:    string;
   tags:           Array<string>;
   links:          Array<Link>;
+  timeSpent?:     number;
   createdAt:      Date;
   updatedAt:      Date;
 }
@@ -42,6 +43,7 @@ interface CreateMangaDto {
   coverImage?:   string;
   tags?:         Array<string>;
   links?:        Array<Link>;
+  timeSpent?:    number;
 }
 
 interface UpdateMangaDto extends Partial<CreateMangaDto> {

shared-types/src/lib/music.types.ts

@@ -34,6 +34,7 @@ interface Music {
   coverArt?:      string;
   tags:           Array<string>;
   links:          Array<Link>;
+  timeSpent?:     number;
   createdAt:      Date;
   updatedAt:      Date;
 }
@@ -50,6 +51,7 @@ interface CreateMusicDto {
   coverArt?:     string;
   tags?:         Array<string>;
   links?:        Array<Link>;
+  timeSpent?:    number;
 }
 
 interface UpdateMusicDto extends Partial<CreateMusicDto> {

shared-types/src/lib/show.types.ts

@@ -34,6 +34,7 @@ interface Show {
   coverImage?:    string;
   tags:           Array<string>;
   links:          Array<Link>;
+  timeSpent?:     number;
   createdAt:      Date;
   updatedAt:      Date;
 }
@@ -49,6 +50,7 @@ interface CreateShowDto {
   coverImage?:   string;
   tags?:         Array<string>;
   links?:        Array<Link>;
+  timeSpent?:    number;
 }
 
 interface UpdateShowDto extends Partial<CreateShowDto> {