feat: add private repository support with SSH key and HTTPS token auth

- Generate SSH ed25519 key pair on agent startup for cloning private repos via SSH
- Add GET /api/v1/settings/ssh-public-key endpoint to expose deploy key
- Add auth_token and auth_username fields to TrackedRepository model
- Wire git2 credential callbacks for both SSH and HTTPS authentication
- Validate repository access before saving (test-connect on add)
- Update dashboard add form with optional auth section showing deploy key and token fields
- Show error toast if private repo cannot be accessed

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

compliance-dashboard/src/infrastructure/repositories.rs

@@ -34,19 +34,29 @@ pub async fn add_repository(
     name: String,
     git_url: String,
     default_branch: String,
+    auth_token: Option<String>,
+    auth_username: Option<String>,
 ) -> Result<(), ServerFnError> {
     let state: super::server_state::ServerState =
         dioxus_fullstack::FullstackContext::extract().await?;
     let url = format!("{}/api/v1/repositories", state.agent_api_url);
 
+    let mut body = serde_json::json!({
+        "name": name,
+        "git_url": git_url,
+        "default_branch": default_branch,
+    });
+    if let Some(token) = auth_token.filter(|t| !t.is_empty()) {
+        body["auth_token"] = serde_json::Value::String(token);
+    }
+    if let Some(username) = auth_username.filter(|u| !u.is_empty()) {
+        body["auth_username"] = serde_json::Value::String(username);
+    }
+
     let client = reqwest::Client::new();
     let resp = client
         .post(&url)
-        .json(&serde_json::json!({
-            "name": name,
-            "git_url": git_url,
-            "default_branch": default_branch,
-        }))
+        .json(&body)
         .send()
         .await
         .map_err(|e| ServerFnError::new(e.to_string()))?;
@@ -61,6 +71,32 @@ pub async fn add_repository(
     Ok(())
 }
 
+#[server]
+pub async fn fetch_ssh_public_key() -> Result<String, ServerFnError> {
+    let state: super::server_state::ServerState =
+        dioxus_fullstack::FullstackContext::extract().await?;
+    let url = format!("{}/api/v1/settings/ssh-public-key", state.agent_api_url);
+
+    let resp = reqwest::get(&url)
+        .await
+        .map_err(|e| ServerFnError::new(e.to_string()))?;
+
+    if !resp.status().is_success() {
+        return Err(ServerFnError::new("SSH key not available".to_string()));
+    }
+
+    let body: serde_json::Value = resp
+        .json()
+        .await
+        .map_err(|e| ServerFnError::new(e.to_string()))?;
+
+    Ok(body
+        .get("public_key")
+        .and_then(|v| v.as_str())
+        .unwrap_or("")
+        .to_string())
+}
+
 #[server]
 pub async fn delete_repository(repo_id: String) -> Result<(), ServerFnError> {
     let state: super::server_state::ServerState =

compliance-dashboard/src/pages/repositories.rs

@@ -23,6 +23,12 @@ pub fn RepositoriesPage() -> Element {
     let mut name = use_signal(String::new);
     let mut git_url = use_signal(String::new);
     let mut branch = use_signal(|| "main".to_string());
+    let mut auth_token = use_signal(String::new);
+    let mut auth_username = use_signal(String::new);
+    let mut show_auth = use_signal(|| false);
+    let mut show_ssh_key = use_signal(|| false);
+    let mut ssh_public_key = use_signal(String::new);
+    let mut adding = use_signal(|| false);
     let mut toasts = use_context::<Toasts>();
     let mut confirm_delete = use_signal(|| Option::<(String, String)>::None); // (id, name)
     let mut scanning_ids = use_signal(Vec::<String>::new);
@@ -66,7 +72,7 @@ pub fn RepositoriesPage() -> Element {
                     label { "Git URL" }
                     input {
                         r#type: "text",
-                        placeholder: "https://github.com/org/repo.git",
+                        placeholder: "https://github.com/org/repo.git  or  git@github.com:org/repo.git",
                         value: "{git_url}",
                         oninput: move |e| git_url.set(e.value()),
                     }
@@ -80,26 +86,105 @@ pub fn RepositoriesPage() -> Element {
                         oninput: move |e| branch.set(e.value()),
                     }
                 }
+
+                // Private repo auth section
+                div { style: "margin-top: 8px;",
+                    button {
+                        class: "btn btn-ghost",
+                        style: "font-size: 12px; padding: 4px 8px;",
+                        onclick: move |_| {
+                            show_auth.toggle();
+                            if !show_ssh_key() {
+                                // Fetch SSH key on first open
+                                show_ssh_key.set(true);
+                                spawn(async move {
+                                    match crate::infrastructure::repositories::fetch_ssh_public_key().await {
+                                        Ok(key) => ssh_public_key.set(key),
+                                        Err(_) => ssh_public_key.set("(not available)".to_string()),
+                                    }
+                                });
+                            }
+                        },
+                        if show_auth() { "Hide auth options" } else { "Private repository?" }
+                    }
+                }
+
+                if show_auth() {
+                    div { class: "auth-section", style: "margin-top: 12px; padding: 12px; border: 1px solid var(--border-subtle); border-radius: 8px;",
+                        // SSH deploy key display
+                        div { style: "margin-bottom: 12px;",
+                            label { style: "font-size: 12px; color: var(--text-secondary);",
+                                "For SSH URLs: add this deploy key (read-only) to your repository"
+                            }
+                            div {
+                                style: "margin-top: 4px; padding: 8px; background: var(--bg-secondary); border-radius: 4px; font-family: monospace; font-size: 11px; word-break: break-all; user-select: all;",
+                                if ssh_public_key().is_empty() {
+                                    "Loading..."
+                                } else {
+                                    "{ssh_public_key}"
+                                }
+                            }
+                        }
+
+                        // HTTPS auth fields
+                        p { style: "font-size: 12px; color: var(--text-secondary); margin-bottom: 8px;",
+                            "For HTTPS URLs: provide an access token (PAT) or username/password"
+                        }
+                        div { class: "form-group",
+                            label { "Auth Token / Password" }
+                            input {
+                                r#type: "password",
+                                placeholder: "ghp_xxxx or personal access token",
+                                value: "{auth_token}",
+                                oninput: move |e| auth_token.set(e.value()),
+                            }
+                        }
+                        div { class: "form-group",
+                            label { "Username (optional, defaults to x-access-token)" }
+                            input {
+                                r#type: "text",
+                                placeholder: "x-access-token",
+                                value: "{auth_username}",
+                                oninput: move |e| auth_username.set(e.value()),
+                            }
+                        }
+                    }
+                }
+
                 button {
                     class: "btn btn-primary",
+                    disabled: adding(),
                     onclick: move |_| {
                         let n = name();
                         let u = git_url();
                         let b = branch();
+                        let tok = {
+                            let v = auth_token();
+                            if v.is_empty() { None } else { Some(v) }
+                        };
+                        let usr = {
+                            let v = auth_username();
+                            if v.is_empty() { None } else { Some(v) }
+                        };
+                        adding.set(true);
                         spawn(async move {
-                            match crate::infrastructure::repositories::add_repository(n, u, b).await {
+                            match crate::infrastructure::repositories::add_repository(n, u, b, tok, usr).await {
                                 Ok(_) => {
                                     toasts.push(ToastType::Success, "Repository added");
                                     repos.restart();
                                 }
                                 Err(e) => toasts.push(ToastType::Error, e.to_string()),
                             }
+                            adding.set(false);
                         });
                         show_add_form.set(false);
+                        show_auth.set(false);
                         name.set(String::new());
                         git_url.set(String::new());
+                        auth_token.set(String::new());
+                        auth_username.set(String::new());
                     },
-                    "Add"
+                    if adding() { "Validating..." } else { "Add" }
                 }
             }
         }