feat: Add daemon health monitoring page, downloads & K8s support (#76)

* feat: soryu-co/soryu - makima: Add server-side daemon binary download endpoint

* feat: soryu-co/soryu - makima: Create Kubernetes daemon manifests and Dockerfile

* feat: soryu-co/soryu - makima: Create dedicated Daemons page with health monitoring UI

* WIP: heartbeat checkpoint

* feat: soryu-co/soryu - makima: Integrate daemon platform availability into frontend downloads

2 files changed, 164 insertions, 0 deletions

diff --git a/makima/src/server/handlers/daemon_download.rs b/makima/src/server/handlers/daemon_download.rs
new file mode 100644
index 0000000..1575d8b
--- /dev/null
+++ b/makima/src/server/handlers/daemon_download.rs
@@ -0,0 +1,163 @@
+//! HTTP handlers for daemon binary downloads.
+//!
+//! Serves pre-compiled daemon binaries for download. Binaries are read from
+//! disk at a configurable path (default: `/app/daemon-binaries`), overridable
+//! via the `DAEMON_BINARIES_DIR` environment variable.
+
+use axum::{
+    extract::Path,
+    http::{header, StatusCode},
+    response::IntoResponse,
+    Json,
+};
+use serde::Serialize;
+
+/// Default directory where daemon binaries are stored.
+const DEFAULT_BINARIES_DIR: &str = "/app/daemon-binaries";
+
+/// Supported platforms for daemon binary downloads.
+const SUPPORTED_PLATFORMS: &[&str] = &[
+    "linux-x86_64",
+    "linux-arm64",
+    "macos-x86_64",
+    "macos-arm64",
+];
+
+/// Response for listing available daemon platforms.
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct PlatformInfo {
+    /// Platform identifier (e.g., "linux-x86_64")
+    pub platform: String,
+    /// Whether a binary is available for this platform
+    pub available: bool,
+    /// Download URL path for this platform
+    pub download_url: String,
+}
+
+/// Response for the list platforms endpoint.
+#[derive(Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct ListPlatformsResponse {
+    /// List of supported platforms and their availability
+    pub platforms: Vec<PlatformInfo>,
+}
+
+/// Get the binaries directory from environment or use default.
+fn get_binaries_dir() -> String {
+    std::env::var("DAEMON_BINARIES_DIR").unwrap_or_else(|_| DEFAULT_BINARIES_DIR.to_string())
+}
+
+/// Get the binary file path for a given platform.
+fn get_binary_path(platform: &str) -> std::path::PathBuf {
+    let dir = get_binaries_dir();
+    std::path::PathBuf::from(dir).join(format!("makima-{}", platform))
+}
+
+/// List available daemon platforms and their download availability.
+///
+/// Returns a list of all supported platforms with availability status
+/// based on whether the binary file exists on disk.
+pub async fn list_daemon_platforms() -> impl IntoResponse {
+    let mut platforms = Vec::with_capacity(SUPPORTED_PLATFORMS.len());
+
+    for &platform in SUPPORTED_PLATFORMS {
+        let path = get_binary_path(platform);
+        let available = path.exists();
+
+        platforms.push(PlatformInfo {
+            platform: platform.to_string(),
+            available,
+            download_url: format!("/api/v1/daemon/download/{}", platform),
+        });
+    }
+
+    (
+        StatusCode::OK,
+        Json(ListPlatformsResponse { platforms }),
+    )
+        .into_response()
+}
+
+/// Download a daemon binary for the specified platform.
+///
+/// Reads the binary from disk and returns it with appropriate headers
+/// for file download. Returns 404 if the binary is not available.
+pub async fn download_daemon(
+    Path(platform): Path<String>,
+) -> impl IntoResponse {
+    // Validate platform
+    if !SUPPORTED_PLATFORMS.contains(&platform.as_str()) {
+        return (
+            StatusCode::BAD_REQUEST,
+            Json(serde_json::json!({
+                "code": "INVALID_PLATFORM",
+                "message": format!(
+                    "Unsupported platform '{}'. Supported platforms: {}",
+                    platform,
+                    SUPPORTED_PLATFORMS.join(", ")
+                )
+            })),
+        )
+            .into_response();
+    }
+
+    let binary_path = get_binary_path(&platform);
+
+    // Read binary from disk
+    let binary_data = match tokio::fs::read(&binary_path).await {
+        Ok(data) => data,
+        Err(e) if e.kind() == std::io::ErrorKind::NotFound => {
+            return (
+                StatusCode::NOT_FOUND,
+                Json(serde_json::json!({
+                    "code": "BINARY_NOT_FOUND",
+                    "message": format!(
+                        "Daemon binary for platform '{}' is not available for download",
+                        platform
+                    )
+                })),
+            )
+                .into_response();
+        }
+        Err(e) => {
+            tracing::error!(
+                platform = %platform,
+                path = %binary_path.display(),
+                error = %e,
+                "Failed to read daemon binary"
+            );
+            return (
+                StatusCode::INTERNAL_SERVER_ERROR,
+                Json(serde_json::json!({
+                    "code": "READ_ERROR",
+                    "message": "Failed to read daemon binary"
+                })),
+            )
+                .into_response();
+        }
+    };
+
+    let filename = format!("makima-{}", platform);
+
+    // Return binary with download headers
+    (
+        StatusCode::OK,
+        [
+            (
+                header::CONTENT_TYPE,
+                "application/octet-stream".to_string(),
+            ),
+            (
+                header::CONTENT_DISPOSITION,
+                format!("attachment; filename=\"{}\"", filename),
+            ),
+            (
+                header::CONTENT_LENGTH,
+                binary_data.len().to_string(),
+            ),
+        ],
+        binary_data,
+    )
+        .into_response()
+}
diff --git a/makima/src/server/handlers/mod.rs b/makima/src/server/handlers/mod.rs
index 8b06a28..4bdb424 100644
--- a/makima/src/server/handlers/mod.rs
+++ b/makima/src/server/handlers/mod.rs
@@ -5,6 +5,7 @@ pub mod chat;
 pub mod contract_chat;
 pub mod contract_daemon;
 pub mod contract_discuss;
+pub mod daemon_download;
 pub mod contracts;
 pub mod directives;
 pub mod file_ws;