refactor: replace long arg lists with input/config structs and builder

- Thought::new_local → NewThought struct (7 args → 1)
- UserWriter::update_profile → UpdateProfileInput struct (6 args → 2)
- update_profile use case → UpdateProfileInput (8 args → 3)
- ActivityPubService::new → builder pattern (9 args → 5 required + 4 optional setters)
- accept_note → AcceptNoteInput struct (8 args → 1)
- ThoughtNote::new_public → ThoughtNoteInput struct (8 args → 1)

Remove all #[allow(clippy::too_many_arguments)] annotations.

crates/domain/src/models/thought.rs

@@ -46,24 +46,26 @@ impl Visibility {
     }
 }
 
+pub struct NewThought {
+    pub id: ThoughtId,
+    pub user_id: UserId,
+    pub content: Content,
+    pub in_reply_to_id: Option<ThoughtId>,
+    pub visibility: Visibility,
+    pub content_warning: Option<String>,
+    pub sensitive: bool,
+}
+
 impl Thought {
-    pub fn new_local(
-        id: ThoughtId,
-        user_id: UserId,
-        content: Content,
-        in_reply_to_id: Option<ThoughtId>,
-        visibility: Visibility,
-        content_warning: Option<String>,
-        sensitive: bool,
-    ) -> Self {
+    pub fn new_local(p: NewThought) -> Self {
         Self {
-            id,
-            user_id,
-            content,
-            in_reply_to_id,
-            visibility,
-            content_warning,
-            sensitive,
+            id: p.id,
+            user_id: p.user_id,
+            content: p.content,
+            in_reply_to_id: p.in_reply_to_id,
+            visibility: p.visibility,
+            content_warning: p.content_warning,
+            sensitive: p.sensitive,
             local: true,
             created_at: Utc::now(),
             updated_at: None,

crates/domain/src/models/user.rs

@@ -1,6 +1,15 @@
 use crate::value_objects::{Email, PasswordHash, UserId, Username};
 use chrono::{DateTime, Utc};
 
+#[derive(Debug, Default, Clone)]
+pub struct UpdateProfileInput {
+    pub display_name: Option<String>,
+    pub bio: Option<String>,
+    pub avatar_url: Option<String>,
+    pub header_url: Option<String>,
+    pub custom_css: Option<String>,
+}
+
 #[derive(Debug, Clone)]
 pub struct User {
     pub id: UserId,

crates/domain/src/ports.rs

@@ -12,7 +12,7 @@ use crate::{
         tag::Tag,
         thought::Thought,
         top_friend::TopFriend,
-        user::User,
+        user::{UpdateProfileInput, User},
     },
     value_objects::{
         ApiKeyId, Content, Email, NotificationId, PasswordHash, ThoughtId, UserId, Username,
@@ -69,11 +69,7 @@ pub trait UserWriter: Send + Sync {
     async fn update_profile(
         &self,
         user_id: &UserId,
-        display_name: Option<String>,
-        bio: Option<String>,
-        avatar_url: Option<String>,
-        header_url: Option<String>,
-        custom_css: Option<String>,
+        input: UpdateProfileInput,
     ) -> Result<(), DomainError>;
 }
 

crates/domain/src/testing/mod.rs

@@ -10,7 +10,7 @@ use crate::{
         tag::Tag,
         thought::Thought,
         top_friend::TopFriend,
-        user::User,
+        user::{UpdateProfileInput, User},
     },
     ports::*,
     value_objects::{
@@ -125,11 +125,7 @@ impl UserWriter for TestStore {
     async fn update_profile(
         &self,
         user_id: &UserId,
-        display_name: Option<String>,
-        bio: Option<String>,
-        avatar_url: Option<String>,
-        header_url: Option<String>,
-        custom_css: Option<String>,
+        input: UpdateProfileInput,
     ) -> Result<(), DomainError> {
         if let Some(u) = self
             .users
@@ -138,11 +134,11 @@ impl UserWriter for TestStore {
             .iter_mut()
             .find(|u| &u.id == user_id)
         {
-            u.display_name = display_name;
-            u.bio = bio;
-            u.avatar_url = avatar_url;
-            u.header_url = header_url;
-            u.custom_css = custom_css;
+            u.display_name = input.display_name;
+            u.bio = input.bio;
+            u.avatar_url = input.avatar_url;
+            u.header_url = input.header_url;
+            u.custom_css = input.custom_css;
         }
         Ok(())
     }