fix: per-user Today, native paste and drop on a local machine

- Today's spend in the status bar and the Claude Code statusline is the
  caller's own (`GET /api/pricing/cost?mine=1`, scope.ownSessionWhere), not
  every user's sum for an admin or analyst.
- A screenshot pasted into a local claude pane is sent as Claude Code's own
  image-paste key: Alt+V on Windows (Ctrl+V did nothing there), ^V elsewhere,
  and only when the machine can read its clipboard (wl-paste/xclip + a
  display on Linux), else it is uploaded (GET /api/run/native-paste {key}).
- A file manager's files pasted or dropped on a local browser go in by their
  own paths, read from the OS clipboard or the file manager's selection
  (server/lib/file-manager.js, POST /api/run/clipboard-files and
  /selected-files): no upload, no size limit. A copied image file is pasted
  by path, text that comes with a picture of it (spreadsheet cells) is
  pasted as text, Windows paths go in as `C:/…` mentions.
- Tab titles for Snapshot, Artifacts, Files and Administration.
- An npm tool AgentHub installed under ~/.local is updated there, not by its
  own updater into npm's global prefix.

statusline/statusline.js

@@ -94,7 +94,7 @@ function cachePath() {
 }
 
 /**
- * Today's cost across all sessions from the dashboard, or null. A failed fetch
+ * Today's cost of the pane owner's own sessions (all sessions locally), or null. A failed fetch
  * is cached too, so a stopped dashboard costs one timeout per TTL, not per line.
  */
 async function todayCost({ url, file = cachePath(), now = Date.now() } = {}) {
@@ -114,7 +114,7 @@ async function todayCost({ url, file = cachePath(), now = Date.now() } = {}) {
     if (process.env.AGENTHUB_PANE_TOKEN)
       headers["x-agenthub-pane-token"] = process.env.AGENTHUB_PANE_TOKEN;
     const offset = new Date(now).getTimezoneOffset();
-    const res = await fetch(`${url}/api/pricing/cost?tz_offset=${offset}`, {
+    const res = await fetch(`${url}/api/pricing/cost?tz_offset=${offset}&mine=1`, {
       headers,
       signal: AbortSignal.timeout(COST_TIMEOUT_MS),
     });