feat(model-server): backend modèles locaux — serveur llama.cpp intégré (#35) et profils OpenCode locaux multiples (#36)

Sprint « Modeles locaux », couche backend (domain/application/infra/app-tauri).

#35 — Serveur de modèle local intégré (llama.cpp) :
- domain: model_server.rs (agrégat + statut), ports ModelServerProbe /
  ManagedProcess / ModelServerRuntime / ModelServerRegistry, événements
  model_server_status_changed et agent_launch_failed.
- application: use case EnsureLocalModelServer branché sur LaunchAgent.
- infrastructure: adapters HttpOpenAiCompatibleProbe, LlamaCppRuntime,
  LocalManagedProcess, FsModelServerRegistry.
- app-tauri: DTO plat LocalModelServerConfigDto, commandes
  list/save/delete_model_server avec garde model_server_in_use, wiring.

#36 — Profils OpenCode locaux multiples :
- domain: VO LocalModelServerId, OpenCodeConfig.local_model_server_id.
- application: use case CloneOpenCodeProfileFromSeed.
- app-tauri: commande clone_opencode_profile_from_seed, DTO/wiring.

Tests verts (exécution réelle) : domain+application OK, app-tauri
dto_model_servers 3/3 et dto_profiles 10/10, infra model_server 2/2,
application model_server+profile_usecases 19/19, cargo build workspace Finished.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/app-tauri/tests/dto_profiles.rs

@@ -3,15 +3,16 @@
 //! error behaviour.
 
 use app_tauri_lib::dto::{
-    parse_delete_profile, parse_profile_id, ConfigureProfilesRequestDto, DetectProfilesRequestDto,
-    DetectProfilesResponseDto, FirstRunStateDto, ProfileListDto, SaveProfileRequestDto,
+    parse_delete_profile, parse_profile_id, CloneOpenCodeProfileFromSeedRequestDto,
+    ConfigureProfilesRequestDto, DetectProfilesRequestDto, DetectProfilesResponseDto,
+    FirstRunStateDto, ProfileListDto, SaveProfileRequestDto,
 };
 use application::{
-    ConfigureProfilesInput, DetectProfilesInput, DetectProfilesOutput, FirstRunStateOutput,
-    ProfileAvailability, SaveProfileInput,
+    CloneOpenCodeProfileFromSeedInput, ConfigureProfilesInput, DetectProfilesInput,
+    DetectProfilesOutput, FirstRunStateOutput, ProfileAvailability, SaveProfileInput,
 };
-use domain::ids::ProfileId;
-use domain::profile::{AgentProfile, ContextInjection};
+use domain::ids::{LocalModelServerId, ProfileId};
+use domain::profile::{AgentProfile, ContextInjection, OpenCodeConfig};
 use serde_json::json;
 use uuid::Uuid;
 
@@ -94,6 +95,47 @@ fn save_request_deserialises_profile() {
     assert!(input.profile.detect.is_none());
 }
 
+#[test]
+fn clone_opencode_profile_from_seed_request_deserialises_camelcase_config() {
+    let server_id = LocalModelServerId::from_uuid(Uuid::from_u128(35));
+    let raw = json!({
+        "name": "Local Qwen",
+        "opencode": {
+            "baseURL": "http://localhost:8081/v1",
+            "model": "qwen3-coder-70b",
+            "reasoning": false,
+            "attachment": true,
+            "localModelServerId": server_id.to_string()
+        }
+    });
+
+    let dto: CloneOpenCodeProfileFromSeedRequestDto = serde_json::from_value(raw).unwrap();
+    let input: CloneOpenCodeProfileFromSeedInput = dto.into();
+    assert_eq!(input.name.as_deref(), Some("Local Qwen"));
+    let opencode = input.opencode.expect("config override");
+    assert_eq!(opencode.base_url, "http://localhost:8081/v1");
+    assert_eq!(opencode.api_key, None);
+    assert_eq!(opencode.model, "qwen3-coder-70b");
+    assert_eq!(opencode.reasoning, Some(false));
+    assert_eq!(opencode.attachment, Some(true));
+    assert_eq!(opencode.local_model_server_id, Some(server_id));
+}
+
+#[test]
+fn opencode_config_dto_omits_local_model_server_id_when_none() {
+    let config = OpenCodeConfig::new(
+        "http://localhost:8080/v1",
+        None,
+        "qwen3-coder-30b",
+        None,
+        None,
+    )
+    .unwrap();
+
+    let value = serde_json::to_value(&config).unwrap();
+    assert!(value.get("localModelServerId").is_none());
+}
+
 #[test]
 fn configure_request_deserialises_profiles() {
     let raw = json!({ "profiles": [] });