feat: Claude Code Monitor — lanes, pipelines and a merged workspace

Internal SmartGift build of a Claude Code monitoring dashboard.

Lanes: a durable unit of parallel agent work, one per working directory,
tracked across session restarts. Managed lanes are git worktrees the
dashboard provisions and can reset or remove behind a three-check destroy
guard and a counted preflight; adopted lanes are directories you already
own and are never destroyable.

Pipelines: a lane moves through pipeline stages. A stage the agent declares
with evidence renders green; a stage inferred from the tool-event stream
renders dashed amber and never counts as done. Detection is forward-only
within a 30-minute window, and never writes the declared stage.

Workspace: one page at /run with a lane grid, the selected lane's pipeline,
and a full Claude console behind a disclosure.

.husky/pre-commit

@@ -0,0 +1,65 @@
+#!/usr/bin/env sh
+#
+# Pre-commit: auto-format staged files, then run the full test suite.
+# The commit is ABORTED unless every test passes.
+#
+# Activated via `core.hooksPath=.husky` (set by the package.json "prepare"
+# script on `npm install`). No husky/lint-staged runtime required.
+
+# Abort the commit on the first failing command (formatting error or failing test).
+set -e
+
+ROOT="$(git rev-parse --show-toplevel)"
+cd "$ROOT"
+
+# ── 1. Format staged files with Prettier, then re-stage them ────────────────
+# Only Added/Copied/Modified/Renamed paths in the index. --ignore-unknown lets
+# Prettier silently skip anything it can't parse, so we can hand it every staged
+# path without filtering by extension. NUL-delimited (-z / -0) so paths with
+# spaces are handled correctly.
+#
+# NOTE: this re-adds the *whole* file. If you intentionally staged only part of
+# a file, review the result after the auto-format.
+STAGED="$(git diff --cached --name-only --diff-filter=ACMR)"
+if [ -n "$STAGED" ]; then
+  PRETTIER="$ROOT/node_modules/.bin/prettier"
+  if [ -x "$PRETTIER" ]; then
+    set -- "$PRETTIER"
+  else
+    set -- npx --no-install prettier
+  fi
+
+  echo "🎨 Formatting staged files with Prettier..."
+  git diff --cached --name-only --diff-filter=ACMR -z | xargs -0 "$@" --write --ignore-unknown
+  git diff --cached --name-only --diff-filter=ACMR -z | xargs -0 git add
+else
+  echo "🎨 No staged files to format."
+fi
+
+# ── 2. Run tests — commit is blocked unless all pass ────────────────────────
+# Each suite is retried once on failure. The full run executes dozens of test
+# files concurrently, each starting its own server (plus the CLI suite's
+# spawned child processes with hard kill timeouts), so a loaded machine can
+# produce a one-off timing failure unrelated to the commit. A real regression
+# is deterministic: it fails both runs and still blocks the commit. This keeps
+# the gate strict without making commits a dice roll on machine load.
+run_suite() {
+  # $1 = human label, $2 = npm script
+  echo "🧪 Running $1 tests..."
+  if npm run "$2"; then
+    return 0
+  fi
+  echo "⚠️  $1 suite failed — retrying once to rule out machine-load flakiness..."
+  if npm run "$2"; then
+    echo "✅ $1 suite passed on retry — treating the first failure as a load flake."
+    echo "   If this keeps happening, the flaky test above deserves a real fix."
+    return 0
+  fi
+  echo "❌ $1 suite failed twice — genuine failure, aborting the commit."
+  return 1
+}
+
+run_suite backend test:server
+run_suite frontend test:client
+
+echo "✅ Formatting applied and all tests passed — proceeding with commit."