新增: AST 代码智能 read_symbol 三态(治 prompt 爆,信息密度驱动)

tree-sitter 语法层符号解析,治 aichat read_file 全文回灌 prompt 爆(e46f5605 360K/8dfe0b94 5M)。
核心思想:信息密度≠压缩,read_symbol 按语义层级返符号骨架/全文,非物理读全文件。
- code_intel.rs: grammar_for 集中 lookup(Rust/TS/JS/Vue借TS,3 grammar 4 类)+ read_symbol 三态(骨架默认/全文)+ 不报错兜底(无grammar/解析失败/未找到→grep提示)
- tool_registry 注册 read_symbol(对齐 read_file handler 闭包模式)
- Cargo.toml 加 tree-sitter 0.25 + rust/typescript/javascript grammar
- AST 设计文档 grammar 策略章节定稿(静态编译+lookup,不动态不trait)
实测: code_intel.rs 全文 21851B vs read_symbol 骨架 897B,降 24.4x(达设计目标一个量级+)。单测 14 全过。

Cargo.lock

@@ -859,6 +859,10 @@ dependencies = [
  "tauri-plugin-window-state",
  "tokio",
  "tracing",
+ "tree-sitter",
+ "tree-sitter-javascript",
+ "tree-sitter-rust",
+ "tree-sitter-typescript",
  "uuid",
 ]
 
@@ -3877,6 +3881,7 @@ version = "1.0.150"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e8014e44b4736ed0538adeecded0fce2a272f22dc9578a7eb6b2d9993c74cfb9"
 dependencies = [
+ "indexmap 2.14.0",
  "itoa",
  "memchr",
  "serde",
@@ -4140,6 +4145,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "streaming-iterator"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b2231b7c3057d5e4ad0156fb3dc807d900806020c5ffa3ee6ff2c8c76fb8520"
+
 [[package]]
 name = "string_cache"
 version = "0.9.0"
@@ -5097,6 +5108,56 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "tree-sitter"
+version = "0.25.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78f873475d258561b06f1c595d93308a7ed124d9977cb26b148c2084a4a3cc87"
+dependencies = [
+ "cc",
+ "regex",
+ "regex-syntax",
+ "serde_json",
+ "streaming-iterator",
+ "tree-sitter-language",
+]
+
+[[package]]
+name = "tree-sitter-javascript"
+version = "0.25.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68204f2abc0627a90bdf06e605f5c470aa26fdcb2081ea553a04bdad756693f5"
+dependencies = [
+ "cc",
+ "tree-sitter-language",
+]
+
+[[package]]
+name = "tree-sitter-language"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "009994f150cc0cd50ff54917d5bc8bffe8cad10ca10d81c34da2ec421ae61782"
+
+[[package]]
+name = "tree-sitter-rust"
+version = "0.24.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "439e577dbe07423ec2582ac62c7531120dbfccfa6e5f92406f93dd271a120e45"
+dependencies = [
+ "cc",
+ "tree-sitter-language",
+]
+
+[[package]]
+name = "tree-sitter-typescript"
+version = "0.23.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c5f76ed8d947a75cc446d5fccd8b602ebf0cde64ccf2ffa434d873d7a575eff"
+dependencies = [
+ "cc",
+ "tree-sitter-language",
+]
+
 [[package]]
 name = "try-lock"
 version = "0.2.5"