feat(plugins,host): pluginRoot officiel transmis au contexte activate(ctx) des plugins — #285 (domain ports + infrastructure plugin: racine du package installé résolue depuis la même source de vérité que la substitution manifest ${pluginRoot}; application runtime_catalog + slash_command; backend dto + app-tauri dto_plugins; frontend domain + plugins runtime loader transmettent pluginRoot au contexte activé; bump pointeur IdeaSDK e3a0f46 via feature/285-plugin-root-runtime-api; QA verte: cargo check domain/application/infrastructure/backend/app-tauri, runtime_catalog 5/5, plugin_install_load 5/5, dto_plugins 2/2, frontend typecheck + 33 tests/3 fichiers, cargo fmt --check, git diff --check; réserves: rebuild AppImage + validation live ctx.pluginRoot dans le binaire actif restants)

crates/app-tauri/tests/dto_plugins.rs

@@ -50,6 +50,7 @@ fn runtime_catalog_dto_carries_bundle_hash_and_contributions() {
             publisher: None,
             version: "1.2.3".to_owned(),
             bundle_url: "idea-plugin://dev.acme.gitgraph/1.2.3/abc/dist/index.js".to_owned(),
+            plugin_root: "/data/idea/plugins/installed/dev.acme.gitgraph".to_owned(),
             icon_url: None,
             content_hash: "abc".to_owned(),
             capabilities: vec![PluginCapability::Ui, PluginCapability::Tooling],
@@ -64,6 +65,10 @@ fn runtime_catalog_dto_carries_bundle_hash_and_contributions() {
         "idea-plugin://dev.acme.gitgraph/1.2.3/abc/dist/index.js"
     );
     assert_eq!(value["plugins"][0]["contentHash"], "abc");
+    assert_eq!(
+        value["plugins"][0]["pluginRoot"],
+        "/data/idea/plugins/installed/dev.acme.gitgraph"
+    );
     assert_eq!(
         value["plugins"][0]["capabilities"],
         serde_json::json!(["ui", "tooling"])

crates/application/src/plugin/mod.rs

@@ -184,6 +184,8 @@ pub struct PluginRuntimePlugin {
     pub version: String,
     /// Bundle URL.
     pub bundle_url: String,
+    /// Canonical host-local root of the installed plugin package.
+    pub plugin_root: String,
     /// Icon URL.
     pub icon_url: Option<String>,
     /// Content hash.
@@ -3022,6 +3024,10 @@ pub(crate) async fn runtime_plugin_from_entry(
         &descriptor.registry.content_hash,
         &descriptor.manifest.main,
     )?;
+    let plugin_root = packages
+        .installed_plugin_root(&descriptor.manifest.id)
+        .await
+        .map_err(map_store)?;
     let icon_url = match &descriptor.manifest.icon {
         Some(icon) => Some(checked_plugin_asset_url(
             packages,
@@ -3038,6 +3044,7 @@ pub(crate) async fn runtime_plugin_from_entry(
         publisher: descriptor.manifest.publisher,
         version: descriptor.manifest.version.as_str().to_owned(),
         bundle_url: bundle,
+        plugin_root: plugin_root.as_str().to_owned(),
         icon_url,
         content_hash: descriptor.registry.content_hash.as_str().to_owned(),
         capabilities: descriptor.manifest.capabilities,
@@ -4203,6 +4210,10 @@ mod tests {
         let catalog = usecase.execute().await.unwrap();
 
         assert_eq!(catalog.plugins.len(), 1);
+        assert_eq!(
+            catalog.plugins[0].plugin_root,
+            "/installed/dev.acme.gitgraph"
+        );
         assert_eq!(
             catalog.plugins[0].capabilities,
             vec![

crates/application/src/slash_command.rs

@@ -426,6 +426,7 @@ mod tests {
                 publisher: None,
                 version: "1.0.0".to_owned(),
                 bundle_url: "idea-plugin://dev.acme.plugin/1.0.0/hash/dist/index.js".to_owned(),
+                plugin_root: "/plugins/installed/dev.acme.plugin".to_owned(),
                 icon_url: None,
                 content_hash: "abc".to_owned(),
                 capabilities: vec![domain::PluginCapability::Ui],

crates/backend/src/dto.rs

@@ -382,6 +382,8 @@ pub struct PluginRuntimePluginDto {
     pub version: String,
     /// Bundle URL.
     pub bundle_url: String,
+    /// Canonical host-local root of the installed plugin package.
+    pub plugin_root: String,
     /// Icon URL.
     pub icon_url: Option<String>,
     /// Content hash.
@@ -414,6 +416,7 @@ impl From<application::PluginRuntimePlugin> for PluginRuntimePluginDto {
             publisher: value.publisher,
             version: value.version,
             bundle_url: value.bundle_url,
+            plugin_root: value.plugin_root,
             icon_url: value.icon_url,
             content_hash: value.content_hash,
             capabilities: value.capabilities,

crates/domain/src/ports.rs

@@ -440,6 +440,19 @@ pub trait PluginPackageStore: Send + Sync {
     /// Lists committed package roots.
     async fn list_installed(&self) -> Result<Vec<PluginPackageRef>, PluginStoreError>;
 
+    /// Resolves the host-local root of one committed plugin package.
+    async fn installed_plugin_root(
+        &self,
+        plugin_id: &crate::PluginId,
+    ) -> Result<LocalPath, PluginStoreError> {
+        self.list_installed()
+            .await?
+            .into_iter()
+            .find(|package| package.plugin_id.as_ref() == Some(plugin_id))
+            .map(|package| LocalPath::new(package.root))
+            .ok_or(PluginStoreError::NotFound)
+    }
+
     /// Reads `idea-plugin.json` from a package root.
     async fn read_manifest(
         &self,

crates/infrastructure/src/plugin/mod.rs

@@ -141,6 +141,21 @@ impl PluginPackageStore for FsPluginPackageStore {
         Ok(out)
     }
 
+    async fn installed_plugin_root(
+        &self,
+        plugin_id: &PluginId,
+    ) -> Result<LocalPath, PluginStoreError> {
+        let root = self.installed_plugin_dir(plugin_id);
+        let canonical = root.canonicalize().map_err(|error| {
+            if error.kind() == io::ErrorKind::NotFound {
+                PluginStoreError::NotFound
+            } else {
+                PluginStoreError::Io(error.to_string())
+            }
+        })?;
+        Ok(LocalPath::new(canonical.to_string_lossy().into_owned()))
+    }
+
     async fn read_manifest(
         &self,
         package: &PluginPackageRef,

crates/infrastructure/tests/plugin_install_load.rs

@@ -134,6 +134,13 @@ async fn installs_reference_fixture_and_loads_runtime_catalog() {
     assert!(plugin
         .bundle_url
         .starts_with("idea-plugin://dev.idea.fixtures.reference-minimal/0.1.0/"));
+    assert_eq!(
+        PathBuf::from(&plugin.plugin_root),
+        app_data
+            .join("plugins/installed/dev.idea.fixtures.reference-minimal")
+            .canonicalize()
+            .unwrap()
+    );
     assert_eq!(plugin.contributes.menus.len(), 1);
     assert_eq!(plugin.contributes.menu_items.len(), 1);
 
@@ -183,6 +190,13 @@ async fn installs_sdk_hello_plugin_and_loads_runtime_catalog() {
         .bundle_url
         .starts_with("idea-plugin://com.example.hello-plugin/0.1.0/"));
     assert!(plugin.bundle_url.ends_with("/dist/index.js"));
+    assert_eq!(
+        PathBuf::from(&plugin.plugin_root),
+        app_data
+            .join("plugins/installed/com.example.hello-plugin")
+            .canonicalize()
+            .unwrap()
+    );
     assert_eq!(plugin.contributes.menus[0].id, "hello-plugin.menu");
     assert_eq!(plugin.contributes.menus[0].label.as_str(), "Hello Plugin");
     assert_eq!(