refactor(client): unify HTTP clients on a shared http_client core (#46)

.python-version

@@ -0,0 +1 @@
+3.13

src/client/python/http_client.py

@@ -905,6 +905,46 @@ def compute_model_hash():
     return _cached_model_hash
 
 
+def set_model_config(tflite_subdir=None, input_size=None):
+    """Override the model directory and/or input resolution before startup.
+
+    Used by the benchmark client variants to sweep models/resolutions from the
+    command line. When a TFLite subdirectory is given, the submodel prefix and
+    last offloading layer are auto-detected from its ``*.tflite`` files. Any
+    cache derived from the previous model/resolution is invalidated so that the
+    next call rebuilds it.
+    """
+    global TFLITE_DIR, SUBMODEL_PREFIX, LAST_OFFLOADING_LAYER
+    global INPUT_HEIGHT, INPUT_WIDTH
+    global _interpreter_cache, _cached_model_hash, _cached_image_rgb
+    global _cached_rgb565_buffer, _send_image_buffer
+
+    if tflite_subdir is not None:
+        TFLITE_DIR = SCRIPT_DIR / tflite_subdir
+        tflite_files = sorted(TFLITE_DIR.glob("*.tflite"))
+        if tflite_files:
+            SUBMODEL_PREFIX = tflite_files[0].stem.rsplit("_", 1)[0]
+            LAST_OFFLOADING_LAYER = len(tflite_files) - 1
+            print(f"🔍 Detected submodel prefix: {SUBMODEL_PREFIX}")
+            print(
+                f"📊 Detected layers: {len(tflite_files)} "
+                f"(last offloading layer: {LAST_OFFLOADING_LAYER})"
+            )
+        else:
+            print(f"❌ WARNING: TFLite folder is empty: {TFLITE_DIR}")
+
+    if input_size is not None:
+        INPUT_HEIGHT = input_size
+        INPUT_WIDTH = input_size
+
+    # Invalidate caches derived from the previous model/resolution.
+    _interpreter_cache = {}
+    _cached_model_hash = None
+    _cached_image_rgb = None
+    _cached_rgb565_buffer = None
+    _send_image_buffer = None
+
+
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 # MAIN
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