feat: sglang backend support

1 files changed, 24 insertions, 8 deletions

diff --git a/app/backends/__init__.py b/app/backends/__init__.py
index 89d95e2..5a1a602 100644
--- a/app/backends/__init__.py
+++ b/app/backends/__init__.py
@@ -1,12 +1,12 @@
 """Registry of the TTS backends the audiobook generator can talk to.
 
-Each backend (audio.cpp, qwen, faster) lives in its own module and owns
-its setup wizard, its status detection, its uninstaller, and the launch
-command it prints once configured. This package aggregates them into a single
-registry so ``audiobook.py``'s TUI hub and future tools can iterate backends
-without hardcoding their names: ``backends.detect_all()`` reports which are set
-up (and whether their server is currently running), and the registry
-drives the hub's "Configure Backends" menu.
+Each backend (audio.cpp, qwen, faster, SGLang-Omni) lives in its own module
+and owns its setup wizard, its status detection, its uninstaller, and the
+launch command it prints once configured. This package aggregates them into
+a single registry so ``audiobook.py``'s TUI hub and future tools can iterate
+backends without hardcoding their names: ``backends.detect_all()`` reports
+which are set up (and whether their server is currently running), and the
+registry drives the hub's "Configure Backends" menu.
 
 The registry is built lazily on the first call to ``get``/``detect_all``/
 ``detect`` (not at package import time), because the backend modules pull
@@ -59,12 +59,19 @@ class ServerSpec:
     waits for the server to answer HTTP with that identity — not merely to
     accept TCP connections — so "listening but still starting" servers are
     caught. None keeps the plain TCP-connect readiness check.
+
+    START_TIMEOUT overrides the shared ``servers.SERVER_START_TIMEOUT`` for
+    this spec (seconds): the sglang-omni pipeline (preprocessing, TTS
+    generation, vocoder stages) boots far slower than the single-process
+    servers, and its first start may also pull companion weights from the
+    HuggingFace cache. None uses the shared default.
     """
     name: str
     url: str
     argv: List[str]
     cwd: Optional[Path] = None
     identity: Optional[str] = None
+    start_timeout: Optional[int] = None
 
 
 @dataclass
@@ -189,7 +196,7 @@ def _build_registry() -> None:
     """Import the backend modules and wire up REGISTRY (once)."""
     if REGISTRY:
         return
-    from . import audiocpp, faster, qwen
+    from . import audiocpp, faster, qwen, sglomni
 
     REGISTRY.append(BackendInfo(
         key="audiocpp",
@@ -216,6 +223,15 @@ def _build_registry() -> None:
         uninstall=faster.uninstall,
         update=faster.update,
     ))
+    REGISTRY.append(BackendInfo(
+        key="sglomni",
+        label="SGLang-Omni",
+        detect=sglomni.detect,
+        setup_screen=sglomni.setup_screen,
+        uninstall=sglomni.uninstall,
+        update=sglomni.update,
+        configure_screen=sglomni.models_screen,
+    ))
     for info in REGISTRY:
         _BY_KEY[info.key] = info