rustfmt on every edit, clippy before every commit touching Rust

A Claude Code hook formats each .rs file as it is edited, and the pre-commit
hook runs clippy as well as the format check. Clippy only checks, so with the
line-tables profile it takes under a minute (57 s after a change) at load 8.
rust-analyzer, which gave the same errors as clippy for 2.8 GB of memory, is
no longer used.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.claude/settings.json

@@ -5,5 +5,18 @@
       "Bash(env)",
       "mcp__outline__read_document"
     ]
+  },
+  "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write|MultiEdit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "f=$(jq -r '.tool_input.file_path // empty'); case \"$f\" in *.rs) rustfmt --edition 2024 \"$f\" 2>/dev/null || true;; esac"
+          }
+        ]
+      }
+    ]
   }
 }