Split schema.graphql and schema.resolvers.go into per-domain files

Move Query/Mutation field declarations from the monolithic schema.graphql
into each domain's .graphql file using extend type, so gqlgen places
resolvers in the matching *.resolvers.go files. Extract helper functions
into *_helpers.go files to prevent gqlgen from commenting them out.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/graph/schema/activity.graphql

@@ -12,3 +12,11 @@ input CreateActivityInput {
   name: String!
   link: String
 }
+
+extend type Query {
+  activities: [Activity!]!
+}
+
+extend type Mutation {
+  createActivity(input: CreateActivityInput!): Activity!
+}

backend/graph/schema/auth.graphql

@@ -6,3 +6,13 @@ input LoginInput {
 type AuthPayload {
   user: User!
 }
+
+extend type Query {
+  me: User
+}
+
+extend type Mutation {
+  login(input: LoginInput!): AuthPayload!
+  logout: Boolean!
+  refreshToken: AuthPayload!
+}

backend/graph/schema/bookmark.graphql

@@ -12,3 +12,12 @@ input CreateBookmarkInput {
   name: String!
   link: String!
 }
+
+extend type Query {
+  bookmarks: [Bookmark!]!
+}
+
+extend type Mutation {
+  createBookmark(input: CreateBookmarkInput!): Bookmark!
+  deleteBookmark(id: ID!): Bookmark!
+}

backend/graph/schema/favorite.graphql

@@ -12,3 +12,11 @@ input CreateFavoriteInput {
   name: String!
   link: String
 }
+
+extend type Query {
+  favorites: [Favorite!]!
+}
+
+extend type Mutation {
+  createFavorite(input: CreateFavoriteInput!): Favorite!
+}

backend/graph/schema/gitea.graphql

@@ -6,3 +6,7 @@ type GiteaFeedItem {
   commitMessage: String!
   createdAt: Time!
 }
+
+extend type Query {
+  giteaFeed: GiteaFeedItem
+}

backend/graph/schema/job_app_reference.graphql

@@ -21,3 +21,13 @@ input UpdateJobAppReferenceInput {
   value: String
   sortOrder: Int
 }
+
+extend type Query {
+  jobAppReferences: [JobAppReference!]!
+}
+
+extend type Mutation {
+  createJobAppReference(input: CreateJobAppReferenceInput!): JobAppReference!
+  updateJobAppReference(id: ID!, input: UpdateJobAppReferenceInput!): JobAppReference!
+  deleteJobAppReference(id: ID!): Boolean!
+}

backend/graph/schema/job_application.graphql

@@ -30,3 +30,14 @@ input UpdateJobApplicationInput {
   notes: String
   appliedAt: Time
 }
+
+extend type Query {
+  jobApplications: [JobApplication!]!
+  jobApplication(id: ID!): JobApplication
+}
+
+extend type Mutation {
+  createJobApplication(input: CreateJobApplicationInput!): JobApplication!
+  updateJobApplication(id: ID!, input: UpdateJobApplicationInput!): JobApplication!
+  deleteJobApplication(id: ID!): Boolean!
+}

backend/graph/schema/message.graphql

@@ -5,3 +5,7 @@ type Message {
   fileUrl: String
   createdAt: Time!
 }
+
+extend type Query {
+  messages: [Message!]!
+}

backend/graph/schema/post.graphql

@@ -16,3 +16,14 @@ input UpdatePostInput {
   title: String!
   content: String!
 }
+
+extend type Query {
+  posts: [Post!]!
+  post(id: ID!): Post
+}
+
+extend type Mutation {
+  createPost(input: CreatePostInput!): Post!
+  updatePost(id: ID!, input: UpdatePostInput!): Post!
+  deletePost(id: ID!): Post!
+}

backend/graph/schema/rowing.graphql

@@ -7,3 +7,7 @@ type Rowing {
   timePer500m: Float!
   calories: Float!
 }
+
+extend type Query {
+  rowingSessions: [Rowing!]!
+}

backend/graph/schema/schema.graphql

@@ -1,43 +1,4 @@
 scalar Time
 
-type Query {
-  users: [User!]!
-  user(id: ID!): User
-  posts: [Post!]!
-  post(id: ID!): Post
-  activities: [Activity!]!
-  favorites: [Favorite!]!
-  rowingSessions: [Rowing!]!
-  messages: [Message!]!
-  spotifyListening: SpotifyPlaying
-  spotifyRecent: [SpotifyRecentItem!]
-  giteaFeed: GiteaFeedItem
-  steamStatus: SteamStatus
-  me: User
-  bookmarks: [Bookmark!]!
-  jobApplications: [JobApplication!]!
-  jobApplication(id: ID!): JobApplication
-  jobAppReferences: [JobAppReference!]!
-}
-
-type Mutation {
-  login(input: LoginInput!): AuthPayload!
-  logout: Boolean!
-  refreshToken: AuthPayload!
-  createPost(input: CreatePostInput!): Post!
-  updatePost(id: ID!, input: UpdatePostInput!): Post!
-  deletePost(id: ID!): Post!
-  createUser(input: CreateUserInput!): User!
-  deleteUser(id: ID!): User!
-  setUserAdmin(id: ID!, admin: Boolean!): User!
-  createFavorite(input: CreateFavoriteInput!): Favorite!
-  createActivity(input: CreateActivityInput!): Activity!
-  createJobApplication(input: CreateJobApplicationInput!): JobApplication!
-  updateJobApplication(id: ID!, input: UpdateJobApplicationInput!): JobApplication!
-  createBookmark(input: CreateBookmarkInput!): Bookmark!
-  deleteBookmark(id: ID!): Bookmark!
-  deleteJobApplication(id: ID!): Boolean!
-  createJobAppReference(input: CreateJobAppReferenceInput!): JobAppReference!
-  updateJobAppReference(id: ID!, input: UpdateJobAppReferenceInput!): JobAppReference!
-  deleteJobAppReference(id: ID!): Boolean!
-}
+type Query
+type Mutation

backend/graph/schema/spotify.graphql

@@ -26,3 +26,8 @@ type SpotifyRecentItem {
   track: SpotifyTrack!
   playedAt: Time!
 }
+
+extend type Query {
+  spotifyListening: SpotifyPlaying
+  spotifyRecent: [SpotifyRecentItem!]
+}

backend/graph/schema/steam.graphql

@@ -10,3 +10,7 @@ type SteamStatus {
   online: Boolean!
   recentGames: [SteamGame!]!
 }
+
+extend type Query {
+  steamStatus: SteamStatus
+}

backend/graph/schema/user.graphql

@@ -10,3 +10,14 @@ input CreateUserInput {
   username: String!
   password: String!
 }
+
+extend type Query {
+  users: [User!]!
+  user(id: ID!): User
+}
+
+extend type Mutation {
+  createUser(input: CreateUserInput!): User!
+  deleteUser(id: ID!): User!
+  setUserAdmin(id: ID!, admin: Boolean!): User!
+}