Move make-widget/run-server skills to root .claude/skills/

Nested .claude/skills/ dirs (previously under server/) are only
auto-discovered on-demand once a file under that subdirectory is
touched, so /make-widget and /run-server weren't invocable from a
fresh session. Root .claude/skills/ is scanned at session start.

Fixes setup.sh/start-server.sh's relative cd-depth math (was hardcoded
for the old server/.claude/skills/run-server/ depth) to instead
resolve the repo root via git and cd into server/ explicitly, and
updates SKILL.md/driver.py's path references to match the new layout.

.claude/skills/run-server/SKILL.md

@@ -14,7 +14,12 @@ This container ships with **no Python, Node, Docker, or browser, and
 no sudo**. `setup.sh` bootstraps everything non-root; it's the bulk of
 what makes this skill non-obvious. Run it once per fresh container.
 
-All paths below are relative to `server/`.
+Commands below (`setup.sh`, `start-server.sh`, `stop-server.sh`,
+`env.sh`, `driver.py`) are invoked from the **repo root** via their
+`.claude/skills/run-server/` path -- the scripts `cd` into `server/`
+themselves. Anything under `.venv/` (the venv itself, `pytest`,
+`uvicorn`) lives inside `server/`, so those commands need `server/`
+prefixed or `cd server` first.
 
 ## Prerequisites
 
@@ -65,7 +70,7 @@ the pane -- source `env.sh` before the first `tmux` call:
 source .claude/skills/run-server/env.sh
 tmux new-session -d -s runserver -x 200 -y 50
 tmux send-keys -t runserver \
-  'source .claude/skills/run-server/env.sh && .venv/bin/python .claude/skills/run-server/driver.py' Enter
+  'source .claude/skills/run-server/env.sh && server/.venv/bin/python .claude/skills/run-server/driver.py' Enter
 timeout 20 bash -c 'until tmux capture-pane -t runserver -p | grep -q "driver>"; do sleep 0.3; done'
 
 # Every fresh scratch DB starts with no users -- bootstrap-admin
@@ -143,7 +148,7 @@ isn't needed for most UI testing.
 ## Test
 
 ```bash
-.venv/bin/pytest
+cd server && .venv/bin/pytest
 ```
 
 Uses its own tempfile SQLite per run (`tests/conftest.py`) -- no setup

.claude/skills/run-server/driver.py

@@ -10,8 +10,8 @@ eval/console-errors).
 Requires setup.sh to have run first (Python venv + Playwright Chromium
 + the non-root shared-lib/font extraction). Run via:
 
-    server/.claude/skills/run-server/env.sh sourced, then
-    .venv/bin/python server/.claude/skills/run-server/driver.py
+    .claude/skills/run-server/env.sh sourced, then
+    server/.venv/bin/python .claude/skills/run-server/driver.py
 
 See SKILL.md for the full agent-path invocation (tmux wrapping etc).
 """

.claude/skills/run-server/setup.sh

@@ -4,7 +4,7 @@
 # container that ships with NO Python/Node/Docker/browser and NO sudo.
 # Re-run any time; every step checks whether it already happened.
 set -euo pipefail
-cd "$(dirname "${BASH_SOURCE[0]}")"/../../..   # -> server/
+cd "$(git -C "$(dirname "${BASH_SOURCE[0]}")" rev-parse --show-toplevel)/server"
 
 UV_BIN="$HOME/.local/bin/uv"
 DEPS_ROOT="/tmp/run-server-chromium-deps"

.claude/skills/run-server/start-server.sh

@@ -3,7 +3,7 @@
 # real deployment's data (see CLAUDE.md). Waits for readiness, prints
 # the PID and log path. Usage: ./start-server.sh [scratch-dir] [port]
 set -euo pipefail
-cd "$(dirname "${BASH_SOURCE[0]}")"/../../..   # -> server/
+cd "$(git -C "$(dirname "${BASH_SOURCE[0]}")" rev-parse --show-toplevel)/server"
 
 SCRATCH="${1:-/tmp/run-server-scratch}"
 PORT="${2:-8420}"

CLAUDE.md

@@ -54,7 +54,7 @@ Start here, don't re-derive from scratch:
   live (mobile viewport CSS collapse, a dialog's status message landing
   behind its own backdrop, a JSON/form-urlencoded body mismatch). Spin up
   `uvicorn app.main:app` against a scratch `DATABASE_URL`/`CONFIG_PATH`
-  sqlite file, don't touch the real deployment's data. `server/.claude/skills/run-server/`
+  sqlite file, don't touch the real deployment's data. `.claude/skills/run-server/`
   (`/run-server`) has a driver for exactly this.
 - **New/changed UI must work at both desktop and mobile widths --
   screenshot both, don't assume one implies the other.** The layout