feat(terminals): reprise de conversation par cellule + fix ordre d'écriture

Permet de recharger la conversation CLI précédente de chaque cellule à la
réouverture du projet, de façon universelle (indépendant du modèle/CLI).

- profil AgentRuntime: bloc déclaratif optionnel `session { assignFlag, resumeFlag }`
- LeafCell: `conversationId` (persistant, distinct du SessionId PTY) + `agentWasRunning`
- runtime: SessionPlan (None/Assign/Resume) + composition pure des args
- LaunchAgent: décide Assign vs Resume, génère l'UUID, remonte l'id assigné
  (persistance par l'appelant via setCellConversation — découplage SRP)
- close: SnapshotRunningAgents fige `agentWasRunning` avant le kill-all
  (statut clot/en cours universel, sans parsing CLI)
- SessionInspector: port optionnel best-effort + adapter ClaudeTranscriptInspector
- popup de reprise par cellule (statut + sujet/tokens si dispo), intercalée
  avant le Resume auto, jamais sur le chemin reattach

fix(terminals): sérialise les écritures PTY (file FIFO par handle) — corrige
les caractères mélangés/accents dus au réordonnancement des invoke Tauri concurrents

fix(layout): l'opération `move` préservait mal les champs du leaf (perdait `agent`)

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

crates/domain/src/profile.rs

@@ -76,11 +76,54 @@ impl ContextInjection {
     }
 }
 
+/// Declares how IdeA assigns and resumes a CLI conversation, without parsing
+/// the model's output (universal, declarative — see CONTEXT.md §9).
+///
+/// Optional on a profile: a profile without a `session` block behaves as today
+/// (no resume).
+///
+/// Invariants:
+/// - `resume_flag` is non-empty,
+/// - if `assign_flag` is `Some`, it is non-empty.
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SessionStrategy {
+    /// Flag passed on the FIRST launch with a UUID generated by IdeA
+    /// (e.g. `"--session-id"`). `None` => degraded mode (resume without id).
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub assign_flag: Option<String>,
+    /// Resume flag (e.g. `"--resume"` or `"--continue"`).
+    pub resume_flag: String,
+}
+
+impl SessionStrategy {
+    /// Builds a validated session strategy.
+    ///
+    /// # Errors
+    /// Returns [`DomainError::EmptyField`] if `resume_flag` is empty, or if
+    /// `assign_flag` is `Some` but empty.
+    pub fn new(
+        assign_flag: Option<String>,
+        resume_flag: impl Into<String>,
+    ) -> Result<Self, DomainError> {
+        let resume_flag = resume_flag.into();
+        crate::validation::non_empty(&resume_flag, "session.resumeFlag")?;
+        if let Some(flag) = &assign_flag {
+            crate::validation::non_empty(flag, "session.assignFlag")?;
+        }
+        Ok(Self {
+            assign_flag,
+            resume_flag,
+        })
+    }
+}
+
 /// Declarative runtime configuration for one AI CLI.
 ///
 /// Invariants:
 /// - `name` and `command` non-empty,
-/// - `context_injection` is itself valid (guaranteed by its constructors).
+/// - `context_injection` is itself valid (guaranteed by its constructors),
+/// - `session` is itself valid (guaranteed by its constructor).
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct AgentProfile {
@@ -101,6 +144,10 @@ pub struct AgentProfile {
     /// **never** the project root, so that N agents of the same profile never
     /// collide on a single conventional file (`CLAUDE.md`, …) at the root.
     pub cwd_template: String,
+    /// Optional conversation assign/resume strategy. Absent (legacy / no resume)
+    /// keeps today's behaviour.
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub session: Option<SessionStrategy>,
 }
 
 impl AgentProfile {
@@ -117,6 +164,7 @@ impl AgentProfile {
         context_injection: ContextInjection,
         detect: Option<String>,
         cwd_template: impl Into<String>,
+        session: Option<SessionStrategy>,
     ) -> Result<Self, DomainError> {
         let name = name.into();
         let command = command.into();
@@ -131,6 +179,7 @@ impl AgentProfile {
             context_injection,
             detect,
             cwd_template,
+            session,
         })
     }
 }