Fix API key changes not triggering container recreation

The container was only recreated when the auth mode changed, not when
the API key value itself changed. This meant saving a new key required
a manual container rebuild. Now we store a hash of the API key as a
Docker label and compare it on start, so a key change automatically
recreates the container (preserving the claude config volume).

Also adds a note to the global AWS settings UI that changes require a
container rebuild.

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

app/src-tauri/src/commands/project_commands.rs

@@ -169,6 +169,7 @@ pub async fn start_project_container(
             let needs_recreation = docker::container_needs_recreation(
                     &existing_id,
                     &project,
+                    api_key.as_deref(),
                     settings.global_claude_instructions.as_deref(),
                     &settings.global_custom_env_vars,
                 )

app/src-tauri/src/docker/container.rs

@@ -10,6 +10,19 @@ use std::hash::{Hash, Hasher};
 use super::client::get_docker;
 use crate::models::{AuthMode, BedrockAuthMethod, ContainerInfo, EnvVar, GlobalAwsSettings, Project, ProjectPath};
 
+/// Compute a fingerprint for the API key so we can detect when it changes
+/// without storing the actual key in Docker labels.
+fn compute_api_key_fingerprint(api_key: Option<&str>) -> String {
+    match api_key {
+        Some(key) => {
+            let mut hasher = DefaultHasher::new();
+            key.hash(&mut hasher);
+            format!("{:x}", hasher.finish())
+        }
+        None => String::new(),
+    }
+}
+
 /// Compute a fingerprint string for the custom environment variables.
 /// Sorted alphabetically so order changes do not cause spurious recreation.
 fn compute_env_fingerprint(custom_env_vars: &[EnvVar]) -> String {
@@ -356,6 +369,7 @@ pub async fn create_container(
     labels.insert("triple-c.project-id".to_string(), project.id.clone());
     labels.insert("triple-c.project-name".to_string(), project.name.clone());
     labels.insert("triple-c.auth-mode".to_string(), format!("{:?}", project.auth_mode));
+    labels.insert("triple-c.api-key-fingerprint".to_string(), compute_api_key_fingerprint(api_key));
     labels.insert("triple-c.paths-fingerprint".to_string(), compute_paths_fingerprint(&project.paths));
     labels.insert("triple-c.bedrock-fingerprint".to_string(), compute_bedrock_fingerprint(project));
     labels.insert("triple-c.image".to_string(), image_name.to_string());
@@ -439,6 +453,7 @@ pub async fn remove_container(container_id: &str) -> Result<(), String> {
 pub async fn container_needs_recreation(
     container_id: &str,
     project: &Project,
+    api_key: Option<&str>,
     global_claude_instructions: Option<&str>,
     global_custom_env_vars: &[EnvVar],
 ) -> Result<bool, String> {
@@ -477,6 +492,14 @@ pub async fn container_needs_recreation(
         }
     }
 
+    // ── API key fingerprint ─────────────────────────────────────────────
+    let expected_api_key_fp = compute_api_key_fingerprint(api_key);
+    let container_api_key_fp = get_label("triple-c.api-key-fingerprint").unwrap_or_default();
+    if container_api_key_fp != expected_api_key_fp {
+        log::info!("API key fingerprint mismatch, triggering recreation");
+        return Ok(true);
+    }
+
     // ── Project paths fingerprint ──────────────────────────────────────────
     let expected_paths_fp = compute_paths_fingerprint(&project.paths);
     match get_label("triple-c.paths-fingerprint") {