chore(vault): rebuild git infra (gitignore/attributes/mailmap/hooks)

.gitignore

@@ -1,12 +1,52 @@
-# 排除所有文件
+# Obsidian vault — whitelist strategy
+# Ignore everything at repo root, explicitly allow specific dirs/files.
+# Rationale: keep LLM Wiki layer + infra in git; track .obsidian configs too.
+
 /*
-# 但保留这些目录和文件
+
+# === Tracked content (LLM Wiki layer + infrastructure) ===
 !raw/
 !wiki/
 !Templates/
+!tools/
+!.githooks/
 !AGENTS.md
 !.gitignore
-# 保留目录内的所有内容
+!.gitattributes
+!.mailmap
+
+# Allow everything inside tracked dirs
 !raw/**
 !wiki/**
 !Templates/**
+!tools/**
+!.githooks/**
+
+# === Obsidian config — track but ignore high-churn state/caches ===
+!.obsidian/
+!.obsidian/**
+
+# Device-specific workspace state (frequent churn, causes merge conflicts)
+.obsidian/workspace.json
+.obsidian/workspace.json.tmp
+.obsidian/workspace_*.json
+.obsidian/workspace_*_Conflict.json
+
+# Large derived indexes
+.obsidian/copilot-index-*.json
+
+# Plugin internals: binaries, deps, backups, high-churn caches
+.obsidian/plugins/*/node_modules/
+.obsidian/plugins/*/*.exe
+.obsidian/plugins/*/*.dll
+.obsidian/plugins/*/data.json.bak
+.obsidian/plugins/recent-files-obsidian/data.json
+
+# === Python ===
+**/__pycache__/
+*.pyc
+
+# === OS junk ===
+**/Thumbs.db
+**/.DS_Store
+**/desktop.ini