fix(chainfire): Use wildcard route for KV endpoints

Replace :key with *key pattern to avoid axum route conflict.
Adds wildcard handler functions for GET/PUT/DELETE that properly
handle both simple keys and namespaced keys with slashes.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

chainfire/crates/chainfire-server/src/rest.rs

@@ -134,7 +134,8 @@ pub struct PrefixQuery {
 /// Build the REST API router
 pub fn build_router(state: RestApiState) -> Router {
     Router::new()
-        .route("/api/v1/kv/:key", get(get_kv).put(put_kv).delete(delete_kv))
+        // Wildcard route handles all keys (with or without slashes)
+        .route("/api/v1/kv/*key", get(get_kv_wildcard).put(put_kv_wildcard).delete(delete_kv_wildcard))
         .route("/api/v1/kv", get(list_kv))
         .route("/api/v1/cluster/status", get(cluster_status))
         .route("/api/v1/cluster/members", post(add_member))
@@ -222,6 +223,95 @@ async fn delete_kv(
     ))
 }
 
+/// GET /api/v1/kv/*key - Get value (wildcard for all keys)
+async fn get_kv_wildcard(
+    State(state): State<RestApiState>,
+    Path(key): Path<String>,
+) -> Result<Json<SuccessResponse<GetResponse>>, (StatusCode, Json<ErrorResponse>)> {
+    // Use key as-is for simple keys, prepend / for namespaced keys
+    // Keys like "testkey" stay as "testkey", keys like "flaredb/stores/1" become "/flaredb/stores/1"
+    let full_key = if key.contains('/') {
+        format!("/{}", key)
+    } else {
+        key.clone()
+    };
+    let sm = state.raft.state_machine();
+    let key_bytes = full_key.as_bytes().to_vec();
+
+    let results = sm.kv()
+        .get(&key_bytes)
+        .map_err(|e| error_response(StatusCode::INTERNAL_SERVER_ERROR, "INTERNAL_ERROR", &e.to_string()))?;
+
+    let value = results
+        .into_iter()
+        .next()
+        .ok_or_else(|| error_response(StatusCode::NOT_FOUND, "NOT_FOUND", "Key not found"))?;
+
+    Ok(Json(SuccessResponse::new(GetResponse {
+        key: full_key,
+        value: String::from_utf8_lossy(&value.value).to_string(),
+    })))
+}
+
+/// PUT /api/v1/kv/*key - Put value (wildcard for all keys)
+async fn put_kv_wildcard(
+    State(state): State<RestApiState>,
+    Path(key): Path<String>,
+    Json(req): Json<PutRequest>,
+) -> Result<(StatusCode, Json<SuccessResponse<serde_json::Value>>), (StatusCode, Json<ErrorResponse>)> {
+    // Use key as-is for simple keys, prepend / for namespaced keys
+    let full_key = if key.contains('/') {
+        format!("/{}", key)
+    } else {
+        key.clone()
+    };
+    let command = RaftCommand::Put {
+        key: full_key.as_bytes().to_vec(),
+        value: req.value.as_bytes().to_vec(),
+        lease_id: None,
+        prev_kv: false,
+    };
+
+    state
+        .raft
+        .client_write(command)
+        .await
+        .map_err(|e| error_response(StatusCode::INTERNAL_SERVER_ERROR, "INTERNAL_ERROR", &e.to_string()))?;
+
+    Ok((
+        StatusCode::OK,
+        Json(SuccessResponse::new(serde_json::json!({ "key": full_key, "success": true }))),
+    ))
+}
+
+/// DELETE /api/v1/kv/*key - Delete key (wildcard for all keys)
+async fn delete_kv_wildcard(
+    State(state): State<RestApiState>,
+    Path(key): Path<String>,
+) -> Result<(StatusCode, Json<SuccessResponse<serde_json::Value>>), (StatusCode, Json<ErrorResponse>)> {
+    // Use key as-is for simple keys, prepend / for namespaced keys
+    let full_key = if key.contains('/') {
+        format!("/{}", key)
+    } else {
+        key.clone()
+    };
+    let command = RaftCommand::Delete {
+        key: full_key.as_bytes().to_vec(),
+        prev_kv: false,
+    };
+
+    state
+        .raft
+        .client_write(command)
+        .await
+        .map_err(|e| error_response(StatusCode::INTERNAL_SERVER_ERROR, "INTERNAL_ERROR", &e.to_string()))?;
+
+    Ok((
+        StatusCode::OK,
+        Json(SuccessResponse::new(serde_json::json!({ "key": full_key, "success": true }))),
+    ))
+}
+
 /// GET /api/v1/kv?prefix={prefix} - Range scan
 async fn list_kv(
     State(state): State<RestApiState>,