v18: BASE_MODEL alias resolver — short names just work

Before: BASE_MODEL=qwen-coder-7b silently tried to load HF repo
'qwen-coder-7b' and 404'd. Users had to know the full HF path.

After: short alias resolves to full path before passing to from_pretrained.
Any full HF repo path (no '/' check) still passes through unchanged, so the
fix is non-breaking. Logs the resolution so it's visible in the kernel run.

bin/kaggle-trainer.sh

@@ -424,7 +424,32 @@ def pick_base_for_hardware():
 
 
 _auto_base, _auto_size = pick_base_for_hardware()
-BASE = os.environ.get("BASE_MODEL", _auto_base)
+_BASE_ALIASES = {
+    # short-name → real HF path (matches BASE_SWAP_CANDIDATES dict below;
+    # resolved here so BASE_MODEL=qwen-coder-7b just works without users
+    # having to type the full HF repo path).
+    "qwen-coder-7b":      "Qwen/Qwen2.5-Coder-7B-Instruct",
+    "qwen-coder-14b":     "Qwen/Qwen2.5-Coder-14B-Instruct",
+    "qwen-coder-32b":     "Qwen/Qwen2.5-Coder-32B-Instruct",
+    "granite-4.1-8b":     "ibm-granite/granite-4.1-8B-base",
+    "olmoe-1b-7b":        "allenai/OLMoE-1B-7B-0924-Instruct",
+    "qwen3-coder-7b":     "Qwen/Qwen3-Coder-7B-Instruct",
+    "qwen3-coder-30b":    "Qwen/Qwen3-Coder-30B-A3B-Instruct",
+    "qwen3-7b-instruct":  "Qwen/Qwen3-7B-Instruct",
+    "qwen3-8b-instruct":  "Qwen/Qwen3-8B-Instruct",
+    "glm-4-9b-chat":      "zai-org/glm-4-9b-chat",
+    "glm-4-9b-chat-1m":   "zai-org/glm-4-9b-chat-1m",
+    "glm-4.1v-9b-think":  "zai-org/GLM-4.1V-9B-Thinking",
+    "glm-4.7-flash":      "zai-org/GLM-4.7-Flash",
+    "glm-4.5-air":        "zai-org/GLM-4.5-Air-Base",
+    "glm-5":              "zai-org/GLM-5",
+    "glm-5.1":            "zai-org/GLM-5.1",
+    "glm-5.1-fp8":        "zai-org/GLM-5.1-FP8",
+}
+_user_base = os.environ.get("BASE_MODEL", _auto_base)
+BASE = _BASE_ALIASES.get(_user_base, _user_base)  # alias OR full HF path
+if _user_base != BASE:
+    print(f"  resolved BASE_MODEL alias '{_user_base}' → '{BASE}'")
 MAX_SAMPLES = int(os.environ.get("MAX_SAMPLES", "100000"))
 EPOCHS = float(os.environ.get("EPOCHS", "1"))