audit fixes: RTK hook, settings unification, graphifyy, statusline

- Add RTK PreToolUse hook (rtk-rewrite.sh) and fix missing config
- Unify settings.json: merge hooks, marketplaces, model into project file
  so link.sh symlink is the single source of truth
- Add statusline: model, folder, git branch, context % progress bar
- Add graphifyy support: detect, install (pipx), lock, doctor, session-start
- Clarify ctx7/ruflo as standalone CLI (not MCP servers)
- Fix install-plugins.sh step numbering (duplicate step 6)
- Add version check in session-start (local vs origin/master)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hooks/statusline.sh

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+# Claude Code statusline — folder, git branch, model, context %
+# Receives JSON on stdin from Claude Code.
+
+INPUT=$(cat)
+
+MODEL=$(echo "$INPUT" | jq -r '.model.display_name // "?"')
+DIR=$(echo "$INPUT" | jq -r '.cwd // "?"')
+FOLDER="${DIR##*/}"
+PCT=$(echo "$INPUT" | jq -r \
+  '.context_window.used_percentage // 0' \
+  | cut -d. -f1)
+
+# Git branch (fast, no network)
+BRANCH=""
+if [ -d "$DIR" ]; then
+  BRANCH=$(git -C "$DIR" branch --show-current 2>/dev/null)
+fi
+BRANCH_STR="${BRANCH:+ ($BRANCH)}"
+
+# Progress bar (20 chars wide)
+WIDTH=20
+FILLED=$((PCT * WIDTH / 100))
+EMPTY=$((WIDTH - FILLED))
+if [ "$FILLED" -gt 0 ]; then
+  printf -v FILL "%${FILLED}s"
+else
+  FILL=""
+fi
+if [ "$EMPTY" -gt 0 ]; then
+  printf -v PAD "%${EMPTY}s"
+else
+  PAD=""
+fi
+BAR="${FILL// /█}${PAD// /░}"
+
+# Color: green <50%, yellow 50-79%, red >=80%
+if [ "$PCT" -ge 80 ]; then
+  COLOR="\033[31m"
+elif [ "$PCT" -ge 50 ]; then
+  COLOR="\033[33m"
+else
+  COLOR="\033[32m"
+fi
+RESET="\033[0m"
+
+# Output: single line
+echo -e "$MODEL | $FOLDER${BRANCH_STR} | ${COLOR}${BAR}${RESET} ${PCT}%"