Fix case sensitivity in Qwen3-1.7B model filename

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

src/llm.ts

@@ -150,7 +150,7 @@ export type RerankDocument = {
 const DEFAULT_EMBED_MODEL = "hf:ggml-org/embeddinggemma-300M-GGUF/embeddinggemma-300M-Q8_0.gguf";
 const DEFAULT_RERANK_MODEL = "hf:ggml-org/Qwen3-Reranker-0.6B-Q8_0-GGUF/qwen3-reranker-0.6b-q8_0.gguf";
 // const DEFAULT_GENERATE_MODEL = "hf:ggml-org/Qwen3-0.6B-GGUF/Qwen3-0.6B-Q8_0.gguf";
-const DEFAULT_GENERATE_MODEL = "hf:ggml-org/Qwen3-1.7B-GGUF/Qwen3-1.7b-q8_0.gguf";
+const DEFAULT_GENERATE_MODEL = "hf:ggml-org/Qwen3-1.7B-GGUF/Qwen3-1.7B-Q8_0.gguf";
 
 // Local model cache directory
 const MODEL_CACHE_DIR = join(homedir(), ".cache", "qmd", "models");