refactor(app_api): extract cli_bridge wrappers into own submodule

Lift the four cli_publish_* Tauri commands (player_snapshot,
library_list, server_list, search_results) out of app_api/core.rs
into app_api/cli_bridge.rs. Each is a thin pass-through to
`crate::cli::write_*_response` — the renderer-side counterpart to the
file-based IPC layer in cli/exchange.rs.

This is the "cli-bridge" slice from cucadmuh's plan for splitting
core.rs's mixed concerns. Together with the earlier perf split,
core.rs is now down to runtime-control + platform + logging slices —
one possible follow-up but each is small enough to leave as-is for now.

app_api/core.rs: 122 → 99 LOC.

src-tauri/src/lib_commands/app_api/cli_bridge.rs

@@ -0,0 +1,27 @@
+//! Tauri commands the frontend invokes to push player state and list payloads
+//! to the JSON response files that `psysonic --info` / `--player library list`
+//! / `--player server list` / `--player search …` then read.
+
+/// Writes `psysonic-cli-snapshot.json` for `psysonic --info` (debounced from the frontend).
+#[tauri::command]
+pub(crate) fn cli_publish_player_snapshot(snapshot: serde_json::Value) -> Result<(), String> {
+    crate::cli::write_cli_snapshot(&snapshot)
+}
+
+/// Writes `psysonic-cli-library.json` for `psysonic --player library list`.
+#[tauri::command]
+pub(crate) fn cli_publish_library_list(payload: serde_json::Value) -> Result<(), String> {
+    crate::cli::write_library_cli_response(&payload)
+}
+
+/// Writes `psysonic-cli-servers.json` for `psysonic --player server list`.
+#[tauri::command]
+pub(crate) fn cli_publish_server_list(payload: serde_json::Value) -> Result<(), String> {
+    crate::cli::write_server_list_cli_response(&payload)
+}
+
+/// Writes `psysonic-cli-search.json` for `psysonic --player search …`.
+#[tauri::command]
+pub(crate) fn cli_publish_search_results(payload: serde_json::Value) -> Result<(), String> {
+    crate::cli::write_search_cli_response(&payload)
+}

src-tauri/src/lib_commands/app_api/core.rs

@@ -11,30 +11,6 @@ pub(crate) fn exit_app(app_handle: tauri::AppHandle) {
     app_handle.exit(0);
 }
 
-/// Writes `psysonic-cli-snapshot.json` for `psysonic --info` (debounced from the frontend).
-#[tauri::command]
-pub(crate) fn cli_publish_player_snapshot(snapshot: serde_json::Value) -> Result<(), String> {
-    crate::cli::write_cli_snapshot(&snapshot)
-}
-
-/// Writes `psysonic-cli-library.json` for `psysonic --player library list`.
-#[tauri::command]
-pub(crate) fn cli_publish_library_list(payload: serde_json::Value) -> Result<(), String> {
-    crate::cli::write_library_cli_response(&payload)
-}
-
-/// Writes `psysonic-cli-servers.json` for `psysonic --player server list`.
-#[tauri::command]
-pub(crate) fn cli_publish_server_list(payload: serde_json::Value) -> Result<(), String> {
-    crate::cli::write_server_list_cli_response(&payload)
-}
-
-/// Writes `psysonic-cli-search.json` for `psysonic --player search …`.
-#[tauri::command]
-pub(crate) fn cli_publish_search_results(payload: serde_json::Value) -> Result<(), String> {
-    crate::cli::write_search_cli_response(&payload)
-}
-
 /// Toggle native window decorations at runtime (Linux custom title bar opt-out).
 #[tauri::command]
 pub(crate) fn set_window_decorations(enabled: bool, app_handle: tauri::AppHandle) {

src-tauri/src/lib_commands/app_api/mod.rs

@@ -1,5 +1,6 @@
 use super::*;
 
+mod cli_bridge;
 mod core;
 mod navidrome;
 mod perf;
@@ -7,6 +8,7 @@ mod remote;
 mod integration;
 mod analysis;
 
+pub(crate) use cli_bridge::*;
 pub(crate) use core::*;
 pub(crate) use navidrome::*;
 pub(crate) use perf::*;