Added web ui

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         include:
           - os: ubuntu-latest
             build_target: x86_64-unknown-linux-musl
@@ -23,6 +23,9 @@ jobs:
           - os: windows-latest
             build_target: x86_64-pc-windows-msvc
             platform_name: windows-amd64
+          - os: macos-latest
+            build_target: aarch64-apple-darwin
+            platform_name: macos-arm64
     permissions:
       contents: write
     steps:
@@ -54,10 +57,6 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@stable
       
-      - uses: mbrobbel/rustfmt-check@master
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          
       - name: Install rust targets
         run: rustup target add ${{ matrix.build_target }}
         
@@ -67,8 +66,12 @@ jobs:
         with:
           args: cargo build --target ${{ matrix.build_target }} --release
           
+      - name: Build MacOS
+        if: matrix.os == 'macos-latest'
+        run: cargo build --target ${{ matrix.build_target }} --release
+          
       - name: Build Windows
-        if: matrix.os != 'ubuntu-latest'
+        if: matrix.os == 'windows-latest'
         run: cargo build --target ${{ matrix.build_target }} --release
           
       - name: Upload artifact
@@ -104,12 +107,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
         include:
           - os: ubuntu-latest
             platform_name: linux-amd64
           - os: windows-latest
             platform_name: windows-amd64
+          - os: macos-latest
+            platform_name: macos-arm64
     steps:
       - uses: actions/checkout@v4
       

.gitignore

@@ -1 +1,3 @@
 /target
+*.swp
+*.swo

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "actix-codec"
@@ -836,6 +836,17 @@ dependencies = [
  "digest",
 ]
 
+[[package]]
+name = "hostname"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c731c3e10504cc8ed35cfe2f1db4c9274c3d35fa486e3b31df46f068ef3e867"
+dependencies = [
+ "libc",
+ "match_cfg",
+ "winapi",
+]
+
 [[package]]
 name = "http"
 version = "0.2.12"
@@ -1053,19 +1064,23 @@ dependencies = [
 
 [[package]]
 name = "khm"
-version = "0.2.0"
+version = "0.5.0"
 dependencies = [
  "actix-web",
+ "base64 0.21.7",
  "chrono",
  "clap",
  "env_logger",
+ "hostname",
  "log",
  "regex",
  "reqwest",
+ "rust-embed",
  "serde",
  "serde_json",
  "tokio",
  "tokio-postgres",
+ "tokio-util",
 ]
 
 [[package]]
@@ -1119,6 +1134,12 @@ version = "0.4.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7a70ba024b9dc04c27ea2f0c0548feb474ec5c54bba33a7f72f873a39d07b24"
 
+[[package]]
+name = "match_cfg"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffbee8634e0d45d258acb448e7eaab3fce7a0a467395d4d9f228e3c1f01fb2e4"
+
 [[package]]
 name = "md-5"
 version = "0.10.6"
@@ -1555,6 +1576,40 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rust-embed"
+version = "8.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "025908b8682a26ba8d12f6f2d66b987584a4a87bc024abc5bbc12553a8cd178a"
+dependencies = [
+ "rust-embed-impl",
+ "rust-embed-utils",
+ "walkdir",
+]
+
+[[package]]
+name = "rust-embed-impl"
+version = "8.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6065f1a4392b71819ec1ea1df1120673418bf386f50de1d6f54204d836d4349c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "rust-embed-utils",
+ "syn",
+ "walkdir",
+]
+
+[[package]]
+name = "rust-embed-utils"
+version = "8.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6cc0c81648b20b70c491ff8cce00c1c3b223bb8ed2b5d41f0e54c6c4c0a3594"
+dependencies = [
+ "sha2",
+ "walkdir",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.24"
@@ -1629,6 +1684,15 @@ version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f3cb5ba0dc43242ce17de99c180e96db90b235b8a9fdc9543c96d2209116bd9f"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.23"
@@ -2114,6 +2178,16 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "walkdir"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29790946404f91d9c5d06f9874efddea1dc06c5efe94541a7d6863108e3a5e4b"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "want"
 version = "0.3.1"
@@ -2222,6 +2296,37 @@ dependencies = [
  "web-sys",
 ]
 
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-util"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
+dependencies = [
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-core"
 version = "0.52.0"

Cargo.toml

@@ -1,8 +1,8 @@
 [package]
 name = "khm"
-version = "0.2.1"
+version = "0.5.0"
 edition = "2021"
-authors = ["AB <ab@hexor.cy>", "ChatGPT-4o"]
+authors = ["AB <ab@hexor.cy>"]
 
 [dependencies]
 actix-web = "4"
@@ -11,8 +11,12 @@ serde_json = "1.0"
 env_logger = "0.11.3"
 log = "0.4"
 regex = "1.10.5"
+base64 = "0.21"
 tokio = { version = "1", features = ["full"] }
 tokio-postgres = { version = "0.7", features = ["with-chrono-0_4"] }
+tokio-util = { version = "0.7", features = ["codec"] }
 clap = { version = "4", features = ["derive"] }
 chrono = "0.4.38"
 reqwest = { version = "0.12", features = ["json"] }
+hostname = "0.3"
+rust-embed = "8.0"

LICENSE-WTFPL

@@ -0,0 +1,13 @@
+        DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
+                    Version 2, December 2004 
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net> 
+
+ Everyone is permitted to copy and distribute verbatim or modified 
+ copies of this license document, and changing it is allowed as long 
+ as the name is changed. 
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE 
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.

README.MD

@@ -24,21 +24,24 @@ khm --server --ip 127.0.0.1 --port 8080 --db-host 127.0.0.1 --db-name khm --db-u
 To run the application in client mode, use the following command:
 
 ```bash
-khm --host http://khm.example.com:8080 --known-hosts ~/.ssh/known_hosts --in-place
+khm --host http://khm.example.com:8080/<FLOW_NAME>/ --known-hosts ~/.ssh/known_hosts --in-place
 ```
 
 ### Arguments
-- `--server`: Run in server mode (default: false).
+Options:
-- `--ip`: IP address to bind the server or client to (default: 127.0.0.1).
+- `--server` Run in server mode
-- `--port`: Port to bind the server or client to (default: 8080).
+- `--in-place` Server mode: Sync the known_hosts file with keys from the server
-- `--db-host`: Hostname or IP address of the PostgreSQL database (default: 127.0.0.1).
+- `--flows <FLOWS>...` Server mode: Comma-separated list of flows to manage [default: default]
-- `--db-name`: Name of the PostgreSQL database (default: khm).
+- `-i, --ip <IP>` Server mode: IP address to bind the server to [default: 127.0.0.1]
-- `--db-user`: Username for the PostgreSQL database (required in server mode).
+- `-p, --port <PORT>` Server mode: Port to bind the server to [default: 8080]
-- `--db-password`: Password for the PostgreSQL database (required in server mode).
+- `--db-host <DB_HOST>` Server mode: Hostname or IP address of the PostgreSQL database [default: 127.0.0.1]
-- `--host`: Host address of the server to connect to in client mode (required in client mode).
+- `--db-name <DB_NAME>` Server mode: Name of the PostgreSQL database [default: khm]
-- `--known-hosts`: Path to the `known_hosts` file (default: ~/.ssh/known_hosts).
+- `--db-user <DB_USER>` Server mode: Username for the PostgreSQL database
-- `--in-place`: Update the `known_hosts` file with keys from the server after sending keys (default: false).
+- `--db-password <DB_PASSWORD>` Server mode: Password for the PostgreSQL database
-- `--flows`: Comma-separated list of flows to manage (default: default).
+- `--basic-auth <BASIC_AUTH>` Client mode: Basic Auth credentials [default: ""]
+- `--host <HOST>` Client mode: Full host address of the server to connect to. Like `https://khm.example.com/<FLOW_NAME>`
+- `--known-hosts <KNOWN_HOSTS>` Client mode: Path to the known_hosts file [default: ~/.ssh/known_hosts]
+
 
 ## Installation
 
@@ -59,4 +62,4 @@ Contributions are welcome! Please open an issue or submit a pull request for any
 
 ## License
 
-This project is licensed under the WTFPL License.
+This project is licensed under the WTFPL License.

src/client.rs

@@ -1,4 +1,6 @@
+use base64::{engine::general_purpose, Engine as _};
 use log::{error, info};
+use reqwest::header::{HeaderMap, HeaderValue, AUTHORIZATION};
 use reqwest::Client;
 use serde::{Deserialize, Serialize};
 use std::fs::File;
@@ -48,10 +50,58 @@ fn write_known_hosts(file_path: &str, keys: &[SshKey]) -> io::Result<()> {
     Ok(())
 }
 
-async fn send_keys_to_server(host: &str, keys: Vec<SshKey>) -> Result<(), reqwest::Error> {
+// Get local hostname for request headers
+fn get_hostname() -> String {
+    match hostname::get() {
+        Ok(name) => name.to_string_lossy().to_string(),
+        Err(_) => "unknown-host".to_string(),
+    }
+}
+
+async fn send_keys_to_server(
+    host: &str,
+    keys: Vec<SshKey>,
+    auth_string: &str,
+) -> Result<(), reqwest::Error> {
     let client = Client::new();
     let url = format!("{}/keys", host);
-    let response = client.post(&url).json(&keys).send().await?;
+    info!("URL: {} ", url);
+
+    let mut headers = HeaderMap::new();
+
+    // Add hostname header
+    let hostname = get_hostname();
+    headers.insert(
+        "X-Client-Hostname",
+        HeaderValue::from_str(&hostname).unwrap_or_else(|_| {
+            error!("Failed to create hostname header value");
+            HeaderValue::from_static("unknown-host")
+        }),
+    );
+    info!("Adding hostname header: {}", hostname);
+
+    if !auth_string.is_empty() {
+        let parts: Vec<&str> = auth_string.splitn(2, ':').collect();
+        if parts.len() == 2 {
+            let username = parts[0];
+            let password = parts[1];
+
+            let auth_header_value = format!("{}:{}", username, password);
+            let encoded_auth = general_purpose::STANDARD.encode(auth_header_value);
+            let auth_header = format!("Basic {}", encoded_auth);
+
+            headers.insert(AUTHORIZATION, HeaderValue::from_str(&auth_header).unwrap());
+        } else {
+            error!("Invalid auth string format. Expected 'username:password'");
+        }
+    }
+
+    let response = client
+        .post(&url)
+        .headers(headers)
+        .json(&keys)
+        .send()
+        .await?;
 
     if response.status().is_success() {
         info!("Keys successfully sent to server.");
@@ -65,43 +115,90 @@ async fn send_keys_to_server(host: &str, keys: Vec<SshKey>) -> Result<(), reqwes
     Ok(())
 }
 
-async fn get_keys_from_server(host: &str) -> Result<Vec<SshKey>, reqwest::Error> {
+async fn get_keys_from_server(
+    host: &str,
+    auth_string: &str,
+) -> Result<Vec<SshKey>, reqwest::Error> {
     let client = Client::new();
     let url = format!("{}/keys", host);
-    let response = client.get(&url).send().await?;
 
-    if response.status().is_success() {
+    let mut headers = HeaderMap::new();
-        let keys: Vec<SshKey> = response.json().await?;
+
-        info!("Received {} keys from server", keys.len());
+    // Add hostname header
-        Ok(keys)
+    let hostname = get_hostname();
-    } else {
+    headers.insert(
-        error!(
+        "X-Client-Hostname",
-            "Failed to get keys from server. Status: {}",
+        HeaderValue::from_str(&hostname).unwrap_or_else(|_| {
-            response.status()
+            error!("Failed to create hostname header value");
-        );
+            HeaderValue::from_static("unknown-host")
-        Ok(vec![])
+        }),
+    );
+    info!("Adding hostname header: {}", hostname);
+
+    if !auth_string.is_empty() {
+        let parts: Vec<&str> = auth_string.splitn(2, ':').collect();
+        if parts.len() == 2 {
+            let username = parts[0];
+            let password = parts[1];
+
+            let auth_header_value = format!("{}:{}", username, password);
+            let encoded_auth = general_purpose::STANDARD.encode(auth_header_value);
+            let auth_header = format!("Basic {}", encoded_auth);
+
+            headers.insert(AUTHORIZATION, HeaderValue::from_str(&auth_header).unwrap());
+        } else {
+            error!("Invalid auth string format. Expected 'username:password'");
+        }
     }
+
+    let response = client.get(&url).headers(headers).send().await?;
+
+    let response = response.error_for_status()?;
+
+    let keys: Vec<SshKey> = response.json().await?;
+    info!("Received {} keys from server", keys.len());
+    Ok(keys)
 }
 
 pub async fn run_client(args: crate::Args) -> std::io::Result<()> {
     info!("Client mode: Reading known_hosts file");
-    let keys = read_known_hosts(&args.known_hosts).expect("Failed to read known hosts file");
+    
+    let keys = match read_known_hosts(&args.known_hosts) {
+        Ok(keys) => keys,
+        Err(e) => {
+            if e.kind() == io::ErrorKind::NotFound {
+                info!("known_hosts file not found: {}. Starting with empty key list.", args.known_hosts);
+                Vec::new()
+            } else {
+                error!("Failed to read known_hosts file: {}", e);
+                return Err(e);
+            }
+        }
+    };
 
     let host = args.host.expect("host is required in client mode");
     info!("Client mode: Sending keys to server at {}", host);
-    send_keys_to_server(&host, keys)
+    
-        .await
+    if let Err(e) = send_keys_to_server(&host, keys, &args.basic_auth).await {
-        .expect("Failed to send keys to server");
+        error!("Failed to send keys to server: {}", e);
+        return Err(io::Error::new(io::ErrorKind::Other, format!("Network error: {}", e)));
+    }
 
     if args.in_place {
         info!("Client mode: In-place update is enabled. Fetching keys from server.");
-        let server_keys = get_keys_from_server(&host)
+        let server_keys = match get_keys_from_server(&host, &args.basic_auth).await {
-            .await
+            Ok(keys) => keys,
-            .expect("Failed to get keys from server");
+            Err(e) => {
+                error!("Failed to get keys from server: {}", e);
+                return Err(io::Error::new(io::ErrorKind::Other, format!("Network error: {}", e)));
+            }
+        };
 
         info!("Client mode: Writing updated known_hosts file");
-        write_known_hosts(&args.known_hosts, &server_keys)
+        if let Err(e) = write_known_hosts(&args.known_hosts, &server_keys) {
-            .expect("Failed to write known hosts file");
+            error!("Failed to write known_hosts file: {}", e);
+            return Err(e);
+        }
     }
 
     info!("Client mode: Finished operations");

src/db.rs

@@ -0,0 +1,295 @@
+use crate::server::SshKey;
+use log::info;
+use std::collections::HashMap;
+use std::collections::HashSet;
+use tokio_postgres::Client;
+
+// Structure for storing key processing statistics
+pub struct KeyInsertStats {
+    pub total: usize,                   // Total number of received keys
+    pub inserted: usize,                // Number of new keys
+    pub unchanged: usize,               // Number of unchanged keys
+    pub key_id_map: Vec<(SshKey, i32)>, // Mapping of keys to their IDs in the database
+}
+
+pub async fn initialize_db_schema(client: &Client) -> Result<(), tokio_postgres::Error> {
+    info!("Checking and initializing database schema if needed");
+
+    // Check if tables exist by querying information_schema
+    let tables_exist = client
+        .query(
+            "SELECT EXISTS (
+                SELECT FROM information_schema.tables 
+                WHERE table_schema = 'public' 
+                AND table_name = 'keys'
+            ) AND EXISTS (
+                SELECT FROM information_schema.tables 
+                WHERE table_schema = 'public' 
+                AND table_name = 'flows'
+            )",
+            &[],
+        )
+        .await?
+        .get(0)
+        .map(|row| row.get::<_, bool>(0))
+        .unwrap_or(false);
+
+    if !tables_exist {
+        info!("Database schema doesn't exist. Creating tables...");
+
+        // Create the keys table
+        client
+            .execute(
+                "CREATE TABLE IF NOT EXISTS public.keys (
+                    key_id SERIAL PRIMARY KEY,
+                    host VARCHAR(255) NOT NULL,
+                    key TEXT NOT NULL,
+                    updated TIMESTAMP WITH TIME ZONE NOT NULL,
+                    CONSTRAINT unique_host_key UNIQUE (host, key)
+                )",
+                &[],
+            )
+            .await?;
+
+        // Create the flows table
+        client
+            .execute(
+                "CREATE TABLE IF NOT EXISTS public.flows (
+                    flow_id SERIAL PRIMARY KEY,
+                    name VARCHAR(255) NOT NULL,
+                    key_id INTEGER NOT NULL,
+                    CONSTRAINT fk_key
+                        FOREIGN KEY(key_id)
+                        REFERENCES public.keys(key_id)
+                        ON DELETE CASCADE,
+                    CONSTRAINT unique_flow_key UNIQUE (name, key_id)
+                )",
+                &[],
+            )
+            .await?;
+
+        // Create an index for faster lookups
+        client
+            .execute(
+                "CREATE INDEX IF NOT EXISTS idx_flows_name ON public.flows(name)",
+                &[],
+            )
+            .await?;
+
+        info!("Database schema created successfully");
+    } else {
+        info!("Database schema already exists");
+    }
+
+    Ok(())
+}
+
+pub async fn batch_insert_keys(
+    client: &Client,
+    keys: &[SshKey],
+) -> Result<KeyInsertStats, tokio_postgres::Error> {
+    if keys.is_empty() {
+        return Ok(KeyInsertStats {
+            total: 0,
+            inserted: 0,
+            unchanged: 0,
+            key_id_map: Vec::new(),
+        });
+    }
+
+    // Prepare arrays for batch insertion
+    let mut host_values: Vec<&str> = Vec::with_capacity(keys.len());
+    let mut key_values: Vec<&str> = Vec::with_capacity(keys.len());
+
+    for key in keys {
+        host_values.push(&key.server);
+        key_values.push(&key.public_key);
+    }
+
+    // First, check which keys already exist in the database
+    let mut existing_keys = HashMap::new();
+    let mut key_query = String::from("SELECT host, key, key_id FROM public.keys WHERE ");
+
+    for i in 0..keys.len() {
+        if i > 0 {
+            key_query.push_str(" OR ");
+        }
+        key_query.push_str(&format!("(host = ${} AND key = ${})", i * 2 + 1, i * 2 + 2));
+    }
+
+    let mut params: Vec<&(dyn tokio_postgres::types::ToSql + Sync)> =
+        Vec::with_capacity(keys.len() * 2);
+    for i in 0..keys.len() {
+        params.push(&host_values[i]);
+        params.push(&key_values[i]);
+    }
+
+    let rows = client.query(&key_query, &params[..]).await?;
+
+    for row in rows {
+        let host: String = row.get(0);
+        let key: String = row.get(1);
+        let key_id: i32 = row.get(2);
+        existing_keys.insert((host, key), key_id);
+    }
+
+    // Determine which keys need to be inserted and which already exist
+    let mut keys_to_insert = Vec::new();
+    let mut unchanged_keys = Vec::new();
+
+    for key in keys {
+        let key_tuple = (key.server.clone(), key.public_key.clone());
+        if existing_keys.contains_key(&key_tuple) {
+            unchanged_keys.push((key.clone(), *existing_keys.get(&key_tuple).unwrap()));
+        } else {
+            keys_to_insert.push(key.clone());
+        }
+    }
+
+    let mut inserted_keys = Vec::new();
+
+    // If there are keys to insert, perform the insertion
+    if !keys_to_insert.is_empty() {
+        let mut insert_sql = String::from("INSERT INTO public.keys (host, key, updated) VALUES ");
+
+        let mut insert_params: Vec<&(dyn tokio_postgres::types::ToSql + Sync)> = Vec::new();
+        let mut param_count = 1;
+
+        for (i, key) in keys_to_insert.iter().enumerate() {
+            if i > 0 {
+                insert_sql.push_str(", ");
+            }
+            insert_sql.push_str(&format!("(${}, ${}, NOW())", param_count, param_count + 1));
+            insert_params.push(&key.server);
+            insert_params.push(&key.public_key);
+            param_count += 2;
+        }
+
+        insert_sql.push_str(" RETURNING key_id, host, key");
+
+        let inserted_rows = client.query(&insert_sql, &insert_params[..]).await?;
+
+        for row in inserted_rows {
+            let host: String = row.get(1);
+            let key_text: String = row.get(2);
+            let key_id: i32 = row.get(0);
+
+            if let Some(orig_key) = keys_to_insert
+                .iter()
+                .find(|k| k.server == host && k.public_key == key_text)
+            {
+                inserted_keys.push((orig_key.clone(), key_id));
+            }
+        }
+    }
+
+    // Save the number of elements before combining
+    let inserted_count = inserted_keys.len();
+    let unchanged_count = unchanged_keys.len();
+
+    // Combine results and generate statistics
+    let mut key_id_map = Vec::with_capacity(unchanged_count + inserted_count);
+    key_id_map.extend(unchanged_keys);
+    key_id_map.extend(inserted_keys);
+
+    let stats = KeyInsertStats {
+        total: keys.len(),
+        inserted: inserted_count,
+        unchanged: unchanged_count,
+        key_id_map,
+    };
+
+    info!(
+        "Keys stats: received={}, new={}, unchanged={}",
+        stats.total, stats.inserted, stats.unchanged
+    );
+
+    Ok(stats)
+}
+
+pub async fn batch_insert_flow_keys(
+    client: &Client,
+    flow_name: &str,
+    key_ids: &[i32],
+) -> Result<usize, tokio_postgres::Error> {
+    if key_ids.is_empty() {
+        info!("No keys to associate with flow '{}'", flow_name);
+        return Ok(0);
+    }
+
+    // First, check which associations already exist
+    let mut existing_query =
+        String::from("SELECT key_id FROM public.flows WHERE name = $1 AND key_id IN (");
+
+    for i in 0..key_ids.len() {
+        if i > 0 {
+            existing_query.push_str(", ");
+        }
+        existing_query.push_str(&format!("${}", i + 2));
+    }
+    existing_query.push_str(")");
+
+    let mut params: Vec<&(dyn tokio_postgres::types::ToSql + Sync)> =
+        Vec::with_capacity(key_ids.len() + 1);
+    params.push(&flow_name);
+    for key_id in key_ids {
+        params.push(key_id);
+    }
+
+    let rows = client.query(&existing_query, &params[..]).await?;
+
+    let mut existing_associations = HashSet::new();
+    for row in rows {
+        let key_id: i32 = row.get(0);
+        existing_associations.insert(key_id);
+    }
+
+    // Filter only keys that are not yet associated with the flow
+    let new_key_ids: Vec<&i32> = key_ids
+        .iter()
+        .filter(|&id| !existing_associations.contains(id))
+        .collect();
+
+    if new_key_ids.is_empty() {
+        info!(
+            "All {} keys are already associated with flow '{}'",
+            key_ids.len(),
+            flow_name
+        );
+        return Ok(0);
+    }
+
+    // Build SQL query with multiple values only for new associations
+    let mut sql = String::from("INSERT INTO public.flows (name, key_id) VALUES ");
+
+    for i in 0..new_key_ids.len() {
+        if i > 0 {
+            sql.push_str(", ");
+        }
+        sql.push_str(&format!("($1, ${})", i + 2));
+    }
+
+    sql.push_str(" ON CONFLICT (name, key_id) DO NOTHING");
+
+    // Prepare parameters for the query
+    let mut insert_params: Vec<&(dyn tokio_postgres::types::ToSql + Sync)> =
+        Vec::with_capacity(new_key_ids.len() + 1);
+    insert_params.push(&flow_name);
+    for key_id in &new_key_ids {
+        insert_params.push(*key_id);
+    }
+
+    // Execute query
+    let affected = client.execute(&sql, &insert_params[..]).await?;
+
+    let affected_usize = affected as usize;
+
+    info!(
+        "Added {} new key-flow associations for flow '{}' (skipped {} existing)",
+        affected_usize,
+        flow_name,
+        existing_associations.len()
+    );
+
+    Ok(affected_usize)
+}

src/main.rs

@@ -1,5 +1,7 @@
 mod client;
+mod db;
 mod server;
+mod web;
 
 use clap::Parser;
 use env_logger;
@@ -19,8 +21,8 @@ use log::{error, info};
     Running in server mode:\n\
     khm --server --ip 0.0.0.0 --port 1337 --db-host psql.psql.svc --db-name khm --db-user admin --db-password <SECRET> --flows work,home\n\
     \n\
-    Running in client mode to send diff and sync ~/.ssh/known_hosts with remote flow in place:\n\
+    Running in client mode to send diff and sync ~/.ssh/known_hosts with remote flow `work` in place:\n\
-    khm --host https://khm.example.com/default/keys --known-hosts ~/.ssh/known_hosts --in-place\n\
+    khm --host https://khm.example.com/work --known-hosts ~/.ssh/known_hosts --in-place\n\
     \n\
     "
 )]
@@ -94,7 +96,7 @@ struct Args {
     #[arg(
         long,
         required_if_eq("server", "false"),
-        help = "Client mode: Full host address of the server to connect to. Like https://khm.example.com/flow_name/keys"
+        help = "Client mode: Full host address of the server to connect to. Like https://khm.example.com/<FLOW_NAME>"
     )]
     host: Option<String>,
 
@@ -105,6 +107,10 @@ struct Args {
         help = "Client mode: Path to the known_hosts file"
     )]
     known_hosts: String,
+
+    /// Basic auth string for client mode. Format: user:pass
+    #[arg(long, default_value = "", help = "Client mode: Basic Auth credentials")]
+    basic_auth: String,
 }
 
 #[actix_web::main]
@@ -114,6 +120,19 @@ async fn main() -> std::io::Result<()> {
 
     let args = Args::parse();
 
+    // Check if we have the minimum required arguments
+    if !args.server && args.host.is_none() {
+        // Neither server mode nor client mode properly configured
+        eprintln!("Error: You must specify either server mode (--server) or client mode (--host)");
+        eprintln!();
+        eprintln!("Examples:");
+        eprintln!("  Server mode: {} --server --db-user admin --db-password pass --flows work,home", env!("CARGO_PKG_NAME"));
+        eprintln!("  Client mode: {} --host https://khm.example.com/work", env!("CARGO_PKG_NAME"));
+        eprintln!();
+        eprintln!("Use --help for more information.");
+        std::process::exit(1);
+    }
+
     if args.server {
         info!("Running in server mode");
         if let Err(e) = server::run_server(args).await {

src/server.rs

@@ -1,4 +1,4 @@
-use actix_web::{web, App, HttpResponse, HttpServer, Responder};
+use actix_web::{web, App, HttpRequest, HttpResponse, HttpServer, Responder};
 use log::{error, info};
 use regex::Regex;
 use serde::{Deserialize, Serialize};
@@ -6,6 +6,8 @@ use std::collections::HashMap;
 use std::sync::{Arc, Mutex};
 use tokio_postgres::{Client, NoTls};
 
+use crate::db;
+
 #[derive(Serialize, Deserialize, Clone, Debug)]
 pub struct SshKey {
     pub server: String,
@@ -33,51 +35,6 @@ pub fn is_valid_ssh_key(key: &str) -> bool {
         || ed25519_re.is_match(key)
 }
 
-pub async fn insert_key_if_not_exists(
-    client: &Client,
-    key: &SshKey,
-) -> Result<i32, tokio_postgres::Error> {
-    let row = client
-        .query_opt(
-            "SELECT key_id FROM public.keys WHERE host = $1 AND key = $2",
-            &[&key.server, &key.public_key],
-        )
-        .await?;
-
-    if let Some(row) = row {
-        client
-            .execute(
-                "UPDATE public.keys SET updated = NOW() WHERE key_id = $1",
-                &[&row.get::<_, i32>(0)],
-            )
-            .await?;
-        info!("Updated existing key for server: {}", key.server);
-        Ok(row.get(0))
-    } else {
-        let row = client.query_one(
-            "INSERT INTO public.keys (host, key, updated) VALUES ($1, $2, NOW()) RETURNING key_id",
-            &[&key.server, &key.public_key]
-        ).await?;
-        info!("Inserted new key for server: {}", key.server);
-        Ok(row.get(0))
-    }
-}
-
-pub async fn insert_flow_key(
-    client: &Client,
-    flow_name: &str,
-    key_id: i32,
-) -> Result<(), tokio_postgres::Error> {
-    client
-        .execute(
-            "INSERT INTO public.flows (name, key_id) VALUES ($1, $2) ON CONFLICT DO NOTHING",
-            &[&flow_name, &key_id],
-        )
-        .await?;
-    info!("Inserted key_id {} into flow: {}", key_id, flow_name);
-    Ok(())
-}
-
 pub async fn get_keys_from_db(client: &Client) -> Result<Vec<Flow>, tokio_postgres::Error> {
     let rows = client.query(
         "SELECT k.host, k.key, f.name FROM public.keys k INNER JOIN public.flows f ON k.key_id = f.key_id",
@@ -113,24 +70,53 @@ pub async fn get_keys_from_db(client: &Client) -> Result<Vec<Flow>, tokio_postgr
     Ok(flows_map.into_values().collect())
 }
 
+// Extract client hostname from request headers
+fn get_client_hostname(req: &HttpRequest) -> String {
+    if let Some(hostname) = req.headers().get("X-Client-Hostname") {
+        if let Ok(hostname_str) = hostname.to_str() {
+            return hostname_str.to_string();
+        }
+    }
+    "unknown-client".to_string()
+}
+
 pub async fn get_keys(
     flows: web::Data<Flows>,
     flow_id: web::Path<String>,
     allowed_flows: web::Data<Vec<String>>,
+    req: HttpRequest,
 ) -> impl Responder {
+    let client_hostname = get_client_hostname(&req);
     let flow_id_str = flow_id.into_inner();
+
+    info!(
+        "Received keys request from client '{}' for flow '{}'",
+        client_hostname, flow_id_str
+    );
+
     if !allowed_flows.contains(&flow_id_str) {
-        error!("Flow ID not allowed: {}", flow_id_str);
+        error!(
+            "Flow ID not allowed for client '{}': {}",
+            client_hostname, flow_id_str
+        );
         return HttpResponse::Forbidden().body("Flow ID not allowed");
     }
 
     let flows = flows.lock().unwrap();
     if let Some(flow) = flows.iter().find(|flow| flow.name == flow_id_str) {
         let servers: Vec<&SshKey> = flow.servers.iter().collect();
-        info!("Returning {} keys for flow: {}", servers.len(), flow_id_str);
+        info!(
+            "Returning {} keys for flow '{}' to client '{}'",
+            servers.len(),
+            flow_id_str,
+            client_hostname
+        );
         HttpResponse::Ok().json(servers)
     } else {
-        error!("Flow ID not found: {}", flow_id_str);
+        error!(
+            "Flow ID not found for client '{}': {}",
+            client_hostname, flow_id_str
+        );
         HttpResponse::NotFound().body("Flow ID not found")
     }
 }
@@ -141,42 +127,99 @@ pub async fn add_keys(
     new_keys: web::Json<Vec<SshKey>>,
     db_client: web::Data<Arc<Client>>,
     allowed_flows: web::Data<Vec<String>>,
+    req: HttpRequest,
 ) -> impl Responder {
+    let client_hostname = get_client_hostname(&req);
     let flow_id_str = flow_id.into_inner();
+
+    info!(
+        "Received {} keys from client '{}' for flow '{}'",
+        new_keys.len(),
+        client_hostname,
+        flow_id_str
+    );
+
     if !allowed_flows.contains(&flow_id_str) {
-        error!("Flow ID not allowed: {}", flow_id_str);
+        error!(
+            "Flow ID not allowed for client '{}': {}",
+            client_hostname, flow_id_str
+        );
         return HttpResponse::Forbidden().body("Flow ID not allowed");
     }
 
+    // Check SSH key format
+    let mut valid_keys = Vec::new();
     for new_key in new_keys.iter() {
         if !is_valid_ssh_key(&new_key.public_key) {
-            error!("Invalid SSH key format for server: {}", new_key.server);
+            error!(
+                "Invalid SSH key format from client '{}' for server: {}",
+                client_hostname, new_key.server
+            );
             return HttpResponse::BadRequest().body(format!(
                 "Invalid SSH key format for server: {}",
                 new_key.server
             ));
         }
-
+        valid_keys.push(new_key.clone());
-        match insert_key_if_not_exists(&db_client, new_key).await {
-            Ok(key_id) => {
-                if let Err(e) = insert_flow_key(&db_client, &flow_id_str, key_id).await {
-                    error!("Failed to insert flow key into database: {}", e);
-                    return HttpResponse::InternalServerError()
-                        .body("Failed to insert flow key into database");
-                }
-            }
-            Err(e) => {
-                error!("Failed to insert key into database: {}", e);
-                return HttpResponse::InternalServerError()
-                    .body("Failed to insert key into database");
-            }
-        }
     }
 
+    info!(
+        "Processing batch of {} keys from client '{}' for flow: {}",
+        valid_keys.len(),
+        client_hostname,
+        flow_id_str
+    );
+
+    // Batch insert keys with statistics
+    let key_stats = match crate::db::batch_insert_keys(&db_client, &valid_keys).await {
+        Ok(stats) => stats,
+        Err(e) => {
+            error!(
+                "Failed to batch insert keys from client '{}' into database: {}",
+                client_hostname, e
+            );
+            return HttpResponse::InternalServerError()
+                .body("Failed to batch insert keys into database");
+        }
+    };
+
+    // Always try to associate all keys with the flow, regardless of whether they're new or existing
+    if !key_stats.key_id_map.is_empty() {
+        // Extract all key IDs from statistics, both new and existing
+        let key_ids: Vec<i32> = key_stats.key_id_map.iter().map(|(_, id)| *id).collect();
+
+        // Batch insert key-flow associations
+        if let Err(e) = crate::db::batch_insert_flow_keys(&db_client, &flow_id_str, &key_ids).await
+        {
+            error!(
+                "Failed to batch insert flow keys from client '{}' into database: {}",
+                client_hostname, e
+            );
+            return HttpResponse::InternalServerError()
+                .body("Failed to batch insert flow keys into database");
+        }
+
+        info!(
+            "Added flow associations for {} keys from client '{}' in flow '{}'",
+            key_ids.len(),
+            client_hostname,
+            flow_id_str
+        );
+    } else {
+        info!(
+            "No keys to associate from client '{}' with flow '{}'",
+            client_hostname, flow_id_str
+        );
+    }
+
+    // Get updated data
     let updated_flows = match get_keys_from_db(&db_client).await {
         Ok(flows) => flows,
         Err(e) => {
-            error!("Failed to get updated flows from database: {}", e);
+            error!(
+                "Failed to get updated flows from database after client '{}' request: {}",
+                client_hostname, e
+            );
             return HttpResponse::InternalServerError()
                 .body("Failed to refresh flows from database");
         }
@@ -188,10 +231,28 @@ pub async fn add_keys(
     let updated_flow = flows_guard.iter().find(|flow| flow.name == flow_id_str);
     if let Some(flow) = updated_flow {
         let servers: Vec<&SshKey> = flow.servers.iter().collect();
-        info!("Updated flow: {} with {} keys", flow_id_str, servers.len());
+        info!(
-        HttpResponse::Ok().json(servers)
+            "Keys summary for client '{}', flow '{}': total received={}, new={}, unchanged={}, total in flow={}",
+            client_hostname,
+            flow_id_str,
+            key_stats.total,
+            key_stats.inserted,
+            key_stats.unchanged,
+            servers.len()
+        );
+
+        // Add statistics to HTTP response headers
+        let mut response = HttpResponse::Ok();
+        response.append_header(("X-Keys-Total", key_stats.total.to_string()));
+        response.append_header(("X-Keys-New", key_stats.inserted.to_string()));
+        response.append_header(("X-Keys-Unchanged", key_stats.unchanged.to_string()));
+
+        response.json(servers)
     } else {
-        error!("Flow ID not found after update: {}", flow_id_str);
+        error!(
+            "Flow ID not found after update from client '{}': {}",
+            client_hostname, flow_id_str
+        );
         HttpResponse::NotFound().body("Flow ID not found")
     }
 }
@@ -207,7 +268,17 @@ pub async fn run_server(args: crate::Args) -> std::io::Result<()> {
         args.db_host, db_user, db_password, args.db_name
     );
 
-    let (db_client, connection) = tokio_postgres::connect(&db_conn_str, NoTls).await.unwrap();
+    info!("Connecting to database at {}", args.db_host);
+    let (db_client, connection) = match tokio_postgres::connect(&db_conn_str, NoTls).await {
+        Ok((client, conn)) => (client, conn),
+        Err(e) => {
+            error!("Failed to connect to the database: {}", e);
+            return Err(std::io::Error::new(
+                std::io::ErrorKind::ConnectionRefused,
+                format!("Database connection error: {}", e),
+            ));
+        }
+    };
     let db_client = Arc::new(db_client);
 
     // Spawn a new thread to run the database connection
@@ -217,6 +288,15 @@ pub async fn run_server(args: crate::Args) -> std::io::Result<()> {
         }
     });
 
+    // Initialize database schema if needed
+    if let Err(e) = db::initialize_db_schema(&db_client).await {
+        error!("Failed to initialize database schema: {}", e);
+        return Err(std::io::Error::new(
+            std::io::ErrorKind::Other,
+            format!("Database schema initialization error: {}", e),
+        ));
+    }
+
     let mut initial_flows = match get_keys_from_db(&db_client).await {
         Ok(flows) => flows,
         Err(e) => {
@@ -244,8 +324,15 @@ pub async fn run_server(args: crate::Args) -> std::io::Result<()> {
             .app_data(web::Data::new(flows.clone()))
             .app_data(web::Data::new(db_client.clone()))
             .app_data(allowed_flows.clone())
+            // API routes
+            .route("/api/flows", web::get().to(crate::web::get_flows_api))
+            .route("/{flow_id}/keys/{server}", web::delete().to(crate::web::delete_key_by_server))
+            // Original API routes
             .route("/{flow_id}/keys", web::get().to(get_keys))
             .route("/{flow_id}/keys", web::post().to(add_keys))
+            // Web interface routes
+            .route("/", web::get().to(crate::web::serve_web_interface))
+            .route("/static/{filename:.*}", web::get().to(crate::web::serve_static_file))
     })
     .bind((args.ip.as_str(), args.port))?
     .run()

src/web.rs

@@ -0,0 +1,184 @@
+use actix_web::{web, HttpResponse, Result};
+use log::info;
+use rust_embed::RustEmbed;
+use serde::{Deserialize, Serialize};
+use serde_json::json;
+use std::collections::HashSet;
+use tokio_postgres::Client;
+
+use crate::server::{get_keys_from_db, Flows};
+
+#[derive(RustEmbed)]
+#[folder = "static/"]
+struct StaticAssets;
+
+#[derive(Deserialize)]
+struct DeleteKeyPath {
+    flow_id: String,
+    server: String,
+}
+
+// API endpoint to get list of available flows
+pub async fn get_flows_api(allowed_flows: web::Data<Vec<String>>) -> Result<HttpResponse> {
+    info!("API request for available flows");
+    Ok(HttpResponse::Ok().json(&**allowed_flows))
+}
+
+// API endpoint to delete a specific key by server name
+pub async fn delete_key_by_server(
+    flows: web::Data<Flows>,
+    path: web::Path<(String, String)>,
+    db_client: web::Data<std::sync::Arc<Client>>,
+    allowed_flows: web::Data<Vec<String>>,
+) -> Result<HttpResponse> {
+    let (flow_id_str, server_name) = path.into_inner();
+
+    info!("API request to delete key for server '{}' in flow '{}'", server_name, flow_id_str);
+
+    if !allowed_flows.contains(&flow_id_str) {
+        return Ok(HttpResponse::Forbidden().json(json!({
+            "error": "Flow ID not allowed"
+        })));
+    }
+
+    // Delete from database
+    match delete_key_from_db(&db_client, &server_name, &flow_id_str).await {
+        Ok(deleted_count) => {
+            if deleted_count > 0 {
+                info!("Deleted {} key(s) for server '{}' in flow '{}'", deleted_count, server_name, flow_id_str);
+                
+                // Refresh the in-memory flows
+                let updated_flows = match get_keys_from_db(&db_client).await {
+                    Ok(flows) => flows,
+                    Err(e) => {
+                        return Ok(HttpResponse::InternalServerError().json(json!({
+                            "error": format!("Failed to refresh flows: {}", e)
+                        })));
+                    }
+                };
+
+                let mut flows_guard = flows.lock().unwrap();
+                *flows_guard = updated_flows;
+
+                Ok(HttpResponse::Ok().json(json!({
+                    "message": format!("Successfully deleted {} key(s) for server '{}'", deleted_count, server_name),
+                    "deleted_count": deleted_count
+                })))
+            } else {
+                Ok(HttpResponse::NotFound().json(json!({
+                    "error": format!("No keys found for server '{}'", server_name)
+                })))
+            }
+        }
+        Err(e) => {
+            Ok(HttpResponse::InternalServerError().json(json!({
+                "error": format!("Failed to delete key: {}", e)
+            })))
+        }
+    }
+}
+
+// Helper function to delete a key from database
+async fn delete_key_from_db(
+    client: &Client,
+    server_name: &str,
+    flow_name: &str,
+) -> Result<u64, tokio_postgres::Error> {
+    // First, find the key_ids for the given server
+    let key_rows = client
+        .query("SELECT key_id FROM public.keys WHERE host = $1", &[&server_name])
+        .await?;
+
+    if key_rows.is_empty() {
+        return Ok(0);
+    }
+
+    let key_ids: Vec<i32> = key_rows.iter().map(|row| row.get::<_, i32>(0)).collect();
+
+    // Delete flow associations first
+    let mut flow_delete_count = 0;
+    for key_id in &key_ids {
+        let deleted = client
+            .execute(
+                "DELETE FROM public.flows WHERE name = $1 AND key_id = $2",
+                &[&flow_name, key_id],
+            )
+            .await?;
+        flow_delete_count += deleted;
+    }
+
+    // Check if any of these keys are used in other flows
+    let mut keys_to_delete = Vec::new();
+    for key_id in &key_ids {
+        let count: i64 = client
+            .query_one(
+                "SELECT COUNT(*) FROM public.flows WHERE key_id = $1",
+                &[key_id],
+            )
+            .await?
+            .get(0);
+
+        if count == 0 {
+            keys_to_delete.push(*key_id);
+        }
+    }
+
+    // Delete keys that are no longer referenced by any flow
+    let mut total_deleted = 0;
+    for key_id in keys_to_delete {
+        let deleted = client
+            .execute("DELETE FROM public.keys WHERE key_id = $1", &[&key_id])
+            .await?;
+        total_deleted += deleted;
+    }
+
+    info!(
+        "Deleted {} flow associations and {} orphaned keys for server '{}'",
+        flow_delete_count, total_deleted, server_name
+    );
+
+    Ok(std::cmp::max(flow_delete_count, total_deleted))
+}
+
+// Serve static files from embedded assets
+pub async fn serve_static_file(path: web::Path<String>) -> Result<HttpResponse> {
+    let file_path = path.into_inner();
+    
+    match StaticAssets::get(&file_path) {
+        Some(content) => {
+            let content_type = match std::path::Path::new(&file_path)
+                .extension()
+                .and_then(|s| s.to_str()) 
+            {
+                Some("html") => "text/html; charset=utf-8",
+                Some("css") => "text/css; charset=utf-8",
+                Some("js") => "application/javascript; charset=utf-8",
+                Some("png") => "image/png",
+                Some("jpg") | Some("jpeg") => "image/jpeg",
+                Some("svg") => "image/svg+xml",
+                _ => "application/octet-stream",
+            };
+
+            Ok(HttpResponse::Ok()
+                .content_type(content_type)
+                .body(content.data.as_ref().to_vec()))
+        }
+        None => {
+            Ok(HttpResponse::NotFound().body(format!("File not found: {}", file_path)))
+        }
+    }
+}
+
+// Serve the main web interface from embedded assets
+pub async fn serve_web_interface() -> Result<HttpResponse> {
+    match StaticAssets::get("index.html") {
+        Some(content) => {
+            Ok(HttpResponse::Ok()
+                .content_type("text/html; charset=utf-8")
+                .body(content.data.as_ref().to_vec()))
+        }
+        None => {
+            Ok(HttpResponse::NotFound().body("Web interface not found"))
+        }
+    }
+}

static/index.html

@@ -0,0 +1,134 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>SSH Key Manager</title>
+    <link rel="stylesheet" href="/static/style.css">
+    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap" rel="stylesheet">
+</head>
+<body>
+    <div class="container">
+        <header>
+            <h1>SSH Key Manager</h1>
+            <div class="flow-selector">
+                <label for="flowSelect">Flow:</label>
+                <select id="flowSelect">
+                    <option value="">Select a flow...</option>
+                </select>
+                <button id="refreshBtn" class="btn btn-secondary">Refresh</button>
+            </div>
+        </header>
+
+        <main>
+            <div class="stats-panel">
+                <div class="stat-item">
+                    <span class="stat-value" id="totalKeys">0</span>
+                    <span class="stat-label">Total Keys</span>
+                </div>
+                <div class="stat-item">
+                    <span class="stat-value" id="uniqueServers">0</span>
+                    <span class="stat-label">Unique Servers</span>
+                </div>
+            </div>
+
+            <div class="actions-panel">
+                <button id="addKeyBtn" class="btn btn-primary">Add SSH Key</button>
+                <button id="bulkDeleteBtn" class="btn btn-danger" disabled>Delete Selected</button>
+                <div class="search-box">
+                    <input type="text" id="searchInput" placeholder="Search servers or keys...">
+                </div>
+            </div>
+
+            <div class="keys-table-container">
+                <table class="keys-table">
+                    <thead>
+                        <tr>
+                            <th>
+                                <input type="checkbox" id="selectAll">
+                            </th>
+                            <th>Server</th>
+                            <th>Key Type</th>
+                            <th>Key Preview</th>
+                            <th>Actions</th>
+                        </tr>
+                    </thead>
+                    <tbody id="keysTableBody">
+                        <!-- Keys will be populated here -->
+                    </tbody>
+                </table>
+                <div id="noKeysMessage" class="no-keys-message" style="display: none;">
+                    No SSH keys found for this flow.
+                </div>
+            </div>
+
+            <div class="pagination">
+                <button id="prevPage" class="btn btn-secondary" disabled>Previous</button>
+                <span id="pageInfo">Page 1 of 1</span>
+                <button id="nextPage" class="btn btn-secondary" disabled>Next</button>
+            </div>
+        </main>
+    </div>
+
+    <!-- Add Key Modal -->
+    <div id="addKeyModal" class="modal">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h2>Add SSH Key</h2>
+                <span class="close">&times;</span>
+            </div>
+            <div class="modal-body">
+                <form id="addKeyForm">
+                    <div class="form-group">
+                        <label for="serverInput">Server/Hostname:</label>
+                        <input type="text" id="serverInput" required placeholder="example.com">
+                    </div>
+                    <div class="form-group">
+                        <label for="keyInput">SSH Public Key:</label>
+                        <textarea id="keyInput" required placeholder="ssh-rsa AAAAB3..."></textarea>
+                    </div>
+                    <div class="form-actions">
+                        <button type="button" class="btn btn-secondary" id="cancelAdd">Cancel</button>
+                        <button type="submit" class="btn btn-primary">Add Key</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </div>
+
+    <!-- View Key Modal -->
+    <div id="viewKeyModal" class="modal">
+        <div class="modal-content">
+            <div class="modal-header">
+                <h2>SSH Key Details</h2>
+                <span class="close">&times;</span>
+            </div>
+            <div class="modal-body">
+                <div class="form-group">
+                    <label>Server:</label>
+                    <div id="viewServer" class="read-only-field"></div>
+                </div>
+                <div class="form-group">
+                    <label>SSH Public Key:</label>
+                    <textarea id="viewKey" class="read-only-field" readonly></textarea>
+                </div>
+                <div class="form-actions">
+                    <button type="button" class="btn btn-secondary" id="closeView">Close</button>
+                    <button type="button" class="btn btn-primary" id="copyKey">Copy Key</button>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <!-- Loading Overlay -->
+    <div id="loadingOverlay" class="loading-overlay">
+        <div class="loading-spinner"></div>
+        <div class="loading-text">Loading...</div>
+    </div>
+
+    <!-- Toast Notifications -->
+    <div id="toastContainer" class="toast-container"></div>
+
+    <script src="/static/script.js"></script>
+</body>
+</html>

static/script.js

@@ -0,0 +1,511 @@
+class SSHKeyManager {
+    constructor() {
+        this.currentFlow = null;
+        this.keys = [];
+        this.filteredKeys = [];
+        this.currentPage = 1;
+        this.keysPerPage = 20;
+        this.selectedKeys = new Set();
+        
+        this.initializeEventListeners();
+        this.loadFlows();
+    }
+
+    initializeEventListeners() {
+        // Flow selection
+        document.getElementById('flowSelect').addEventListener('change', (e) => {
+            this.currentFlow = e.target.value;
+            if (this.currentFlow) {
+                this.loadKeys();
+            } else {
+                this.clearTable();
+            }
+        });
+
+        // Refresh button
+        document.getElementById('refreshBtn').addEventListener('click', () => {
+            this.loadFlows();
+            if (this.currentFlow) {
+                this.loadKeys();
+            }
+        });
+
+        // Add key button
+        document.getElementById('addKeyBtn').addEventListener('click', () => {
+            this.showAddKeyModal();
+        });
+
+        // Bulk delete button
+        document.getElementById('bulkDeleteBtn').addEventListener('click', () => {
+            this.deleteSelectedKeys();
+        });
+
+        // Search input
+        document.getElementById('searchInput').addEventListener('input', (e) => {
+            this.filterKeys(e.target.value);
+        });
+
+        // Select all checkbox
+        document.getElementById('selectAll').addEventListener('change', (e) => {
+            this.toggleSelectAll(e.target.checked);
+        });
+
+        // Pagination
+        document.getElementById('prevPage').addEventListener('click', () => {
+            this.changePage(this.currentPage - 1);
+        });
+
+        document.getElementById('nextPage').addEventListener('click', () => {
+            this.changePage(this.currentPage + 1);
+        });
+
+        // Modal events
+        this.initializeModalEvents();
+    }
+
+    initializeModalEvents() {
+        // Add key modal
+        const addModal = document.getElementById('addKeyModal');
+        const addForm = document.getElementById('addKeyForm');
+        
+        addForm.addEventListener('submit', (e) => {
+            e.preventDefault();
+            this.addKey();
+        });
+
+        document.getElementById('cancelAdd').addEventListener('click', () => {
+            this.hideModal('addKeyModal');
+        });
+
+        // View key modal
+        document.getElementById('closeView').addEventListener('click', () => {
+            this.hideModal('viewKeyModal');
+        });
+
+        document.getElementById('copyKey').addEventListener('click', () => {
+            this.copyKeyToClipboard();
+        });
+
+        // Close modals when clicking on close button or outside
+        document.querySelectorAll('.modal .close').forEach(closeBtn => {
+            closeBtn.addEventListener('click', (e) => {
+                this.hideModal(e.target.closest('.modal').id);
+            });
+        });
+
+        document.querySelectorAll('.modal').forEach(modal => {
+            modal.addEventListener('click', (e) => {
+                if (e.target === modal) {
+                    this.hideModal(modal.id);
+                }
+            });
+        });
+    }
+
+    async loadFlows() {
+        try {
+            this.showLoading();
+            const response = await fetch('/api/flows');
+            if (!response.ok) throw new Error('Failed to load flows');
+            
+            const flows = await response.json();
+            this.populateFlowSelector(flows);
+        } catch (error) {
+            this.showToast('Failed to load flows: ' + error.message, 'error');
+        } finally {
+            this.hideLoading();
+        }
+    }
+
+    populateFlowSelector(flows) {
+        const select = document.getElementById('flowSelect');
+        select.innerHTML = '<option value="">Select a flow...</option>';
+        
+        flows.forEach(flow => {
+            const option = document.createElement('option');
+            option.value = flow;
+            option.textContent = flow;
+            select.appendChild(option);
+        });
+    }
+
+    async loadKeys() {
+        if (!this.currentFlow) return;
+
+        try {
+            this.showLoading();
+            const response = await fetch(`/${this.currentFlow}/keys`);
+            if (!response.ok) throw new Error('Failed to load keys');
+            
+            this.keys = await response.json();
+            this.filteredKeys = [...this.keys];
+            this.updateStats();
+            this.renderTable();
+            this.selectedKeys.clear();
+            this.updateBulkDeleteButton();
+        } catch (error) {
+            this.showToast('Failed to load keys: ' + error.message, 'error');
+            this.clearTable();
+        } finally {
+            this.hideLoading();
+        }
+    }
+
+    filterKeys(searchTerm) {
+        if (!searchTerm.trim()) {
+            this.filteredKeys = [...this.keys];
+        } else {
+            const term = searchTerm.toLowerCase();
+            this.filteredKeys = this.keys.filter(key => 
+                key.server.toLowerCase().includes(term) || 
+                key.public_key.toLowerCase().includes(term)
+            );
+        }
+        this.currentPage = 1;
+        this.renderTable();
+    }
+
+    updateStats() {
+        document.getElementById('totalKeys').textContent = this.keys.length;
+        
+        const uniqueServers = new Set(this.keys.map(key => key.server));
+        document.getElementById('uniqueServers').textContent = uniqueServers.size;
+    }
+
+    renderTable() {
+        const tbody = document.getElementById('keysTableBody');
+        const noKeysMessage = document.getElementById('noKeysMessage');
+        
+        if (this.filteredKeys.length === 0) {
+            tbody.innerHTML = '';
+            noKeysMessage.style.display = 'block';
+            this.updatePagination();
+            return;
+        }
+
+        noKeysMessage.style.display = 'none';
+        
+        const startIndex = (this.currentPage - 1) * this.keysPerPage;
+        const endIndex = startIndex + this.keysPerPage;
+        const pageKeys = this.filteredKeys.slice(startIndex, endIndex);
+        
+        tbody.innerHTML = pageKeys.map((key, index) => {
+            const keyType = this.getKeyType(key.public_key);
+            const keyPreview = this.getKeyPreview(key.public_key);
+            const keyId = `${key.server}-${key.public_key}`;
+            
+            return `
+                <tr>
+                    <td>
+                        <input type="checkbox" data-key-id="${keyId}" ${this.selectedKeys.has(keyId) ? 'checked' : ''}>
+                    </td>
+                    <td>${this.escapeHtml(key.server)}</td>
+                    <td><span class="key-type ${keyType.toLowerCase()}">${keyType}</span></td>
+                    <td><span class="key-preview">${keyPreview}</span></td>
+                    <td class="table-actions">
+                        <button class="btn btn-sm btn-secondary" onclick="sshKeyManager.viewKey('${keyId}')">View</button>
+                        <button class="btn btn-sm btn-danger" onclick="sshKeyManager.deleteKey('${keyId}')">Delete</button>
+                    </td>
+                </tr>
+            `;
+        }).join('');
+
+        // Add event listeners for checkboxes
+        tbody.querySelectorAll('input[type="checkbox"]').forEach(checkbox => {
+            checkbox.addEventListener('change', (e) => {
+                const keyId = e.target.dataset.keyId;
+                if (e.target.checked) {
+                    this.selectedKeys.add(keyId);
+                } else {
+                    this.selectedKeys.delete(keyId);
+                }
+                this.updateBulkDeleteButton();
+                this.updateSelectAllCheckbox();
+            });
+        });
+
+        this.updatePagination();
+    }
+
+    updatePagination() {
+        const totalPages = Math.ceil(this.filteredKeys.length / this.keysPerPage);
+        
+        document.getElementById('pageInfo').textContent = `Page ${this.currentPage} of ${totalPages}`;
+        document.getElementById('prevPage').disabled = this.currentPage <= 1;
+        document.getElementById('nextPage').disabled = this.currentPage >= totalPages;
+    }
+
+    changePage(newPage) {
+        const totalPages = Math.ceil(this.filteredKeys.length / this.keysPerPage);
+        if (newPage >= 1 && newPage <= totalPages) {
+            this.currentPage = newPage;
+            this.renderTable();
+        }
+    }
+
+    toggleSelectAll(checked) {
+        this.selectedKeys.clear();
+        
+        if (checked) {
+            this.filteredKeys.forEach(key => {
+                const keyId = `${key.server}-${key.public_key}`;
+                this.selectedKeys.add(keyId);
+            });
+        }
+        
+        this.renderTable();
+        this.updateBulkDeleteButton();
+    }
+
+    updateSelectAllCheckbox() {
+        const selectAllCheckbox = document.getElementById('selectAll');
+        const visibleKeys = this.filteredKeys.length;
+        const selectedVisibleKeys = this.filteredKeys.filter(key => 
+            this.selectedKeys.has(`${key.server}-${key.public_key}`)
+        ).length;
+        
+        if (selectedVisibleKeys === 0) {
+            selectAllCheckbox.indeterminate = false;
+            selectAllCheckbox.checked = false;
+        } else if (selectedVisibleKeys === visibleKeys) {
+            selectAllCheckbox.indeterminate = false;
+            selectAllCheckbox.checked = true;
+        } else {
+            selectAllCheckbox.indeterminate = true;
+        }
+    }
+
+    updateBulkDeleteButton() {
+        const bulkDeleteBtn = document.getElementById('bulkDeleteBtn');
+        bulkDeleteBtn.disabled = this.selectedKeys.size === 0;
+        bulkDeleteBtn.textContent = this.selectedKeys.size > 0 
+            ? `Delete Selected (${this.selectedKeys.size})` 
+            : 'Delete Selected';
+    }
+
+    showAddKeyModal() {
+        if (!this.currentFlow) {
+            this.showToast('Please select a flow first', 'warning');
+            return;
+        }
+        
+        document.getElementById('serverInput').value = '';
+        document.getElementById('keyInput').value = '';
+        this.showModal('addKeyModal');
+    }
+
+    async addKey() {
+        const server = document.getElementById('serverInput').value.trim();
+        const publicKey = document.getElementById('keyInput').value.trim();
+        
+        if (!server || !publicKey) {
+            this.showToast('Please fill in all fields', 'warning');
+            return;
+        }
+
+        if (!this.validateSSHKey(publicKey)) {
+            this.showToast('Invalid SSH key format', 'error');
+            return;
+        }
+
+        try {
+            this.showLoading();
+            const response = await fetch(`/${this.currentFlow}/keys`, {
+                method: 'POST',
+                headers: {
+                    'Content-Type': 'application/json',
+                },
+                body: JSON.stringify([{
+                    server: server,
+                    public_key: publicKey
+                }])
+            });
+
+            if (!response.ok) {
+                const errorText = await response.text();
+                throw new Error(errorText || 'Failed to add key');
+            }
+
+            this.hideModal('addKeyModal');
+            this.showToast('SSH key added successfully', 'success');
+            await this.loadKeys();
+        } catch (error) {
+            this.showToast('Failed to add key: ' + error.message, 'error');
+        } finally {
+            this.hideLoading();
+        }
+    }
+
+    viewKey(keyId) {
+        const key = this.findKeyById(keyId);
+        if (!key) return;
+
+        document.getElementById('viewServer').textContent = key.server;
+        document.getElementById('viewKey').value = key.public_key;
+        this.showModal('viewKeyModal');
+    }
+
+    async deleteKey(keyId) {
+        if (!confirm('Are you sure you want to delete this SSH key?')) {
+            return;
+        }
+
+        const key = this.findKeyById(keyId);
+        if (!key) return;
+
+        try {
+            this.showLoading();
+            const response = await fetch(`/${this.currentFlow}/keys/${encodeURIComponent(key.server)}`, {
+                method: 'DELETE'
+            });
+
+            if (!response.ok) {
+                const errorText = await response.text();
+                throw new Error(errorText || 'Failed to delete key');
+            }
+
+            this.showToast('SSH key deleted successfully', 'success');
+            await this.loadKeys();
+        } catch (error) {
+            this.showToast('Failed to delete key: ' + error.message, 'error');
+        } finally {
+            this.hideLoading();
+        }
+    }
+
+    async deleteSelectedKeys() {
+        if (this.selectedKeys.size === 0) return;
+
+        if (!confirm(`Are you sure you want to delete ${this.selectedKeys.size} selected SSH keys?`)) {
+            return;
+        }
+
+        try {
+            this.showLoading();
+            
+            const deletePromises = Array.from(this.selectedKeys).map(keyId => {
+                const key = this.findKeyById(keyId);
+                if (!key) return Promise.resolve();
+                
+                return fetch(`/${this.currentFlow}/keys/${encodeURIComponent(key.server)}`, {
+                    method: 'DELETE'
+                });
+            });
+
+            await Promise.all(deletePromises);
+            this.showToast(`${this.selectedKeys.size} SSH keys deleted successfully`, 'success');
+            await this.loadKeys();
+        } catch (error) {
+            this.showToast('Failed to delete selected keys: ' + error.message, 'error');
+        } finally {
+            this.hideLoading();
+        }
+    }
+
+    findKeyById(keyId) {
+        return this.keys.find(key => `${key.server}-${key.public_key}` === keyId);
+    }
+
+    validateSSHKey(key) {
+        const sshKeyRegex = /^(ssh-rsa|ssh-dss|ecdsa-sha2-nistp(256|384|521)|ssh-ed25519)\s+[A-Za-z0-9+/]+=*(\s+.*)?$/;
+        return sshKeyRegex.test(key.trim());
+    }
+
+    getKeyType(publicKey) {
+        if (publicKey.startsWith('ssh-rsa')) return 'RSA';
+        if (publicKey.startsWith('ssh-ed25519')) return 'ED25519';
+        if (publicKey.startsWith('ecdsa-sha2-nistp')) return 'ECDSA';
+        if (publicKey.startsWith('ssh-dss')) return 'DSA';
+        return 'Unknown';
+    }
+
+    getKeyPreview(publicKey) {
+        const parts = publicKey.split(' ');
+        if (parts.length >= 2) {
+            const keyPart = parts[1];
+            if (keyPart.length > 20) {
+                return keyPart.substring(0, 20) + '...';
+            }
+            return keyPart;
+        }
+        return publicKey.substring(0, 20) + '...';
+    }
+
+    escapeHtml(text) {
+        const map = {
+            '&': '&amp;',
+            '<': '&lt;',
+            '>': '&gt;',
+            '"': '&quot;',
+            "'": '&#039;'
+        };
+        return text.replace(/[&<>"']/g, (m) => map[m]);
+    }
+
+    copyKeyToClipboard() {
+        const keyTextarea = document.getElementById('viewKey');
+        keyTextarea.select();
+        keyTextarea.setSelectionRange(0, 99999);
+        
+        try {
+            document.execCommand('copy');
+            this.showToast('SSH key copied to clipboard', 'success');
+        } catch (error) {
+            this.showToast('Failed to copy to clipboard', 'error');
+        }
+    }
+
+    clearTable() {
+        document.getElementById('keysTableBody').innerHTML = '';
+        document.getElementById('noKeysMessage').style.display = 'block';
+        document.getElementById('totalKeys').textContent = '0';
+        document.getElementById('uniqueServers').textContent = '0';
+        this.selectedKeys.clear();
+        this.updateBulkDeleteButton();
+    }
+
+    showModal(modalId) {
+        document.getElementById(modalId).style.display = 'block';
+        document.body.style.overflow = 'hidden';
+    }
+
+    hideModal(modalId) {
+        document.getElementById(modalId).style.display = 'none';
+        document.body.style.overflow = 'auto';
+    }
+
+    showLoading() {
+        document.getElementById('loadingOverlay').style.display = 'block';
+    }
+
+    hideLoading() {
+        document.getElementById('loadingOverlay').style.display = 'none';
+    }
+
+    showToast(message, type = 'info') {
+        const toastContainer = document.getElementById('toastContainer');
+        const toast = document.createElement('div');
+        toast.className = `toast ${type}`;
+        toast.textContent = message;
+        
+        toastContainer.appendChild(toast);
+        
+        // Trigger animation
+        setTimeout(() => toast.classList.add('show'), 100);
+        
+        // Remove toast after 4 seconds
+        setTimeout(() => {
+            toast.classList.remove('show');
+            setTimeout(() => {
+                if (toast.parentNode) {
+                    toast.parentNode.removeChild(toast);
+                }
+            }, 300);
+        }, 4000);
+    }
+}
+
+// Initialize the SSH Key Manager when the page loads
+document.addEventListener('DOMContentLoaded', () => {
+    window.sshKeyManager = new SSHKeyManager();
+});

static/style.css

@@ -0,0 +1,505 @@
+:root {
+    --primary-color: #2563eb;
+    --primary-hover: #1d4ed8;
+    --secondary-color: #64748b;
+    --danger-color: #dc2626;
+    --danger-hover: #b91c1c;
+    --success-color: #16a34a;
+    --warning-color: #d97706;
+    --background: #f8fafc;
+    --surface: #ffffff;
+    --border: #e2e8f0;
+    --text-primary: #1e293b;
+    --text-secondary: #64748b;
+    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
+    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
+    --border-radius: 0.5rem;
+    --font-family: 'Inter', sans-serif;
+}
+
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    font-family: var(--font-family);
+    background-color: var(--background);
+    color: var(--text-primary);
+    line-height: 1.6;
+}
+
+.container {
+    max-width: 1400px;
+    margin: 0 auto;
+    padding: 2rem;
+    min-height: 100vh;
+}
+
+header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 2rem;
+    padding-bottom: 1rem;
+    border-bottom: 2px solid var(--border);
+}
+
+header h1 {
+    font-size: 2.5rem;
+    font-weight: 600;
+    color: var(--text-primary);
+}
+
+.flow-selector {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+}
+
+.flow-selector label {
+    font-weight: 500;
+    color: var(--text-secondary);
+}
+
+.flow-selector select {
+    padding: 0.5rem 1rem;
+    border: 1px solid var(--border);
+    border-radius: var(--border-radius);
+    background: var(--surface);
+    color: var(--text-primary);
+    font-size: 1rem;
+    min-width: 200px;
+}
+
+.btn {
+    padding: 0.5rem 1rem;
+    border: none;
+    border-radius: var(--border-radius);
+    font-size: 0.875rem;
+    font-weight: 500;
+    cursor: pointer;
+    transition: all 0.2s ease;
+    display: inline-flex;
+    align-items: center;
+    gap: 0.5rem;
+    text-decoration: none;
+}
+
+.btn:disabled {
+    opacity: 0.6;
+    cursor: not-allowed;
+}
+
+.btn-primary {
+    background-color: var(--primary-color);
+    color: white;
+}
+
+.btn-primary:hover:not(:disabled) {
+    background-color: var(--primary-hover);
+}
+
+.btn-secondary {
+    background-color: var(--secondary-color);
+    color: white;
+}
+
+.btn-secondary:hover:not(:disabled) {
+    background-color: #475569;
+}
+
+.btn-danger {
+    background-color: var(--danger-color);
+    color: white;
+}
+
+.btn-danger:hover:not(:disabled) {
+    background-color: var(--danger-hover);
+}
+
+.btn-sm {
+    padding: 0.25rem 0.5rem;
+    font-size: 0.75rem;
+}
+
+.stats-panel {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
+    gap: 1rem;
+    margin-bottom: 2rem;
+}
+
+.stat-item {
+    background: var(--surface);
+    padding: 1.5rem;
+    border-radius: var(--border-radius);
+    box-shadow: var(--shadow);
+    text-align: center;
+}
+
+.stat-value {
+    display: block;
+    font-size: 2rem;
+    font-weight: 600;
+    color: var(--primary-color);
+}
+
+.stat-label {
+    color: var(--text-secondary);
+    font-size: 0.875rem;
+    font-weight: 500;
+}
+
+.actions-panel {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    margin-bottom: 1.5rem;
+    gap: 1rem;
+    flex-wrap: wrap;
+}
+
+.search-box input {
+    padding: 0.5rem 1rem;
+    border: 1px solid var(--border);
+    border-radius: var(--border-radius);
+    background: var(--surface);
+    color: var(--text-primary);
+    font-size: 1rem;
+    width: 300px;
+}
+
+.keys-table-container {
+    background: var(--surface);
+    border-radius: var(--border-radius);
+    box-shadow: var(--shadow);
+    overflow: hidden;
+    margin-bottom: 1.5rem;
+}
+
+.keys-table {
+    width: 100%;
+    border-collapse: collapse;
+}
+
+.keys-table th,
+.keys-table td {
+    padding: 1rem;
+    text-align: left;
+    border-bottom: 1px solid var(--border);
+}
+
+.keys-table th {
+    background-color: #f1f5f9;
+    font-weight: 600;
+    color: var(--text-primary);
+}
+
+.keys-table tbody tr:hover {
+    background-color: #f8fafc;
+}
+
+.key-preview {
+    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
+    font-size: 0.875rem;
+    color: var(--text-secondary);
+    max-width: 200px;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+}
+
+.key-type {
+    display: inline-block;
+    padding: 0.25rem 0.5rem;
+    background-color: #e0e7ff;
+    color: #3730a3;
+    border-radius: 0.25rem;
+    font-size: 0.75rem;
+    font-weight: 500;
+}
+
+.key-type.rsa { background-color: #fef3c7; color: #92400e; }
+.key-type.ed25519 { background-color: #dcfce7; color: #166534; }
+.key-type.ecdsa { background-color: #e0e7ff; color: #3730a3; }
+.key-type.dsa { background-color: #fce7f3; color: #9d174d; }
+
+.no-keys-message {
+    text-align: center;
+    padding: 3rem;
+    color: var(--text-secondary);
+    font-size: 1.125rem;
+}
+
+.pagination {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    gap: 1rem;
+}
+
+.modal {
+    display: none;
+    position: fixed;
+    z-index: 1000;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(0, 0, 0, 0.5);
+    backdrop-filter: blur(4px);
+}
+
+.modal-content {
+    background-color: var(--surface);
+    margin: 5% auto;
+    padding: 0;
+    border-radius: var(--border-radius);
+    box-shadow: var(--shadow-lg);
+    width: 90%;
+    max-width: 600px;
+    max-height: 80vh;
+    overflow: hidden;
+}
+
+.modal-header {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 1.5rem;
+    border-bottom: 1px solid var(--border);
+}
+
+.modal-header h2 {
+    font-size: 1.5rem;
+    font-weight: 600;
+}
+
+.close {
+    font-size: 1.5rem;
+    font-weight: bold;
+    cursor: pointer;
+    color: var(--text-secondary);
+    padding: 0.5rem;
+    border-radius: var(--border-radius);
+    transition: all 0.2s ease;
+}
+
+.close:hover {
+    background-color: var(--background);
+    color: var(--text-primary);
+}
+
+.modal-body {
+    padding: 1.5rem;
+    max-height: 60vh;
+    overflow-y: auto;
+}
+
+.form-group {
+    margin-bottom: 1.5rem;
+}
+
+.form-group label {
+    display: block;
+    margin-bottom: 0.5rem;
+    font-weight: 500;
+    color: var(--text-primary);
+}
+
+.form-group input,
+.form-group textarea {
+    width: 100%;
+    padding: 0.75rem;
+    border: 1px solid var(--border);
+    border-radius: var(--border-radius);
+    font-size: 1rem;
+    font-family: var(--font-family);
+    background: var(--surface);
+    color: var(--text-primary);
+    transition: border-color 0.2s ease;
+}
+
+.form-group input:focus,
+.form-group textarea:focus {
+    outline: none;
+    border-color: var(--primary-color);
+    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
+}
+
+.form-group textarea {
+    resize: vertical;
+    min-height: 120px;
+    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
+    font-size: 0.875rem;
+}
+
+.read-only-field {
+    background-color: var(--background) !important;
+    cursor: not-allowed;
+}
+
+.form-actions {
+    display: flex;
+    justify-content: flex-end;
+    gap: 1rem;
+    margin-top: 2rem;
+}
+
+.loading-overlay {
+    display: none;
+    position: fixed;
+    z-index: 9999;
+    left: 0;
+    top: 0;
+    width: 100%;
+    height: 100%;
+    background-color: rgba(255, 255, 255, 0.9);
+    backdrop-filter: blur(4px);
+}
+
+.loading-spinner {
+    position: absolute;
+    top: 50%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    width: 40px;
+    height: 40px;
+    border: 4px solid var(--border);
+    border-top: 4px solid var(--primary-color);
+    border-radius: 50%;
+    animation: spin 1s linear infinite;
+}
+
+.loading-text {
+    position: absolute;
+    top: 60%;
+    left: 50%;
+    transform: translate(-50%, -50%);
+    color: var(--text-secondary);
+    font-weight: 500;
+}
+
+@keyframes spin {
+    0% { transform: translate(-50%, -50%) rotate(0deg); }
+    100% { transform: translate(-50%, -50%) rotate(360deg); }
+}
+
+.toast-container {
+    position: fixed;
+    top: 1rem;
+    right: 1rem;
+    z-index: 10000;
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.toast {
+    padding: 1rem 1.5rem;
+    border-radius: var(--border-radius);
+    color: white;
+    font-weight: 500;
+    box-shadow: var(--shadow-lg);
+    transform: translateX(100%);
+    transition: transform 0.3s ease;
+    max-width: 400px;
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+}
+
+.toast.show {
+    transform: translateX(0);
+}
+
+.toast.success {
+    background-color: var(--success-color);
+}
+
+.toast.error {
+    background-color: var(--danger-color);
+}
+
+.toast.warning {
+    background-color: var(--warning-color);
+}
+
+.toast.info {
+    background-color: var(--primary-color);
+}
+
+@media (max-width: 768px) {
+    .container {
+        padding: 1rem;
+    }
+
+    header {
+        flex-direction: column;
+        gap: 1rem;
+        align-items: stretch;
+    }
+
+    .actions-panel {
+        flex-direction: column;
+        align-items: stretch;
+    }
+
+    .search-box input {
+        width: 100%;
+    }
+
+    .keys-table-container {
+        overflow-x: auto;
+    }
+
+    .keys-table {
+        min-width: 600px;
+    }
+
+    .modal-content {
+        margin: 10% auto;
+        width: 95%;
+    }
+
+    .form-actions {
+        flex-direction: column;
+    }
+
+    .stats-panel {
+        grid-template-columns: 1fr;
+    }
+}
+
+/* Checkbox styles */
+input[type="checkbox"] {
+    width: 1rem;
+    height: 1rem;
+    accent-color: var(--primary-color);
+}
+
+/* Action buttons in table */
+.table-actions {
+    display: flex;
+    gap: 0.5rem;
+    align-items: center;
+}
+
+/* Error states */
+.form-group input:invalid,
+.form-group textarea:invalid {
+    border-color: var(--danger-color);
+}
+
+.form-group input:invalid:focus,
+.form-group textarea:invalid:focus {
+    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
+}
+
+/* Success states */
+.form-group input:valid,
+.form-group textarea:valid {
+    border-color: var(--success-color);
+}