新增: Phase 4 注入 — @[项目] 关联任务/灵感 + 三个工具 path 可选

- Augmentation 新增 extra 字段(项目关联信息/任务关联信息/灵感关联信息)
- ProjectResolver: @[项目] 时自动查前5条进行中任务+前3条待评估灵感
- TaskResolver/IdeaResolver: extra 预留(后续按需追加)
- render_one 渲染 extra 行
- search_files/grep/list_directory path 改为可选,不传时返回引导提示

src-tauri/src/commands/ai/augmentation/inject.rs

@@ -66,6 +66,7 @@ fn render_one(aug: &Augmentation, out: &mut String, label: &str) {
             status,
             description,
             path,
+            extra,
             ..
         } => {
             out.push_str("【");
@@ -85,6 +86,10 @@ fn render_one(aug: &Augmentation, out: &mut String, label: &str) {
                 out.push_str(description);
                 out.push('\n');
             }
+            for line in extra {
+                out.push_str(line);
+                out.push('\n');
+            }
             out.push('\n');
         }
         Augmentation::Task {
@@ -92,6 +97,7 @@ fn render_one(aug: &Augmentation, out: &mut String, label: &str) {
             status,
             description,
             project_name,
+            extra,
             ..
         } => {
             out.push_str("【");
@@ -111,12 +117,17 @@ fn render_one(aug: &Augmentation, out: &mut String, label: &str) {
                 out.push_str(description);
                 out.push('\n');
             }
+            for line in extra {
+                out.push_str(line);
+                out.push('\n');
+            }
             out.push('\n');
         }
         Augmentation::Idea {
             title,
             status,
             description,
+            extra,
             ..
         } => {
             out.push_str("【");
@@ -131,6 +142,10 @@ fn render_one(aug: &Augmentation, out: &mut String, label: &str) {
                 out.push_str(description);
                 out.push('\n');
             }
+            for line in extra {
+                out.push_str(line);
+                out.push('\n');
+            }
             out.push('\n');
         }
         Augmentation::Skill {