feat: v0.8.2 clickable paths, alert sessions, ops guard and trail

- Terminal link provider: printed paths that are files of the session open
  in Files (at the line); the file list is preloaded so the first hover works.
- Alerts: "In a new session" opens alert-<name> and types the prompt once
  Claude is up.
- devdesk-guard PreToolUse(Bash) hook: permissionDecision "ask" for
  destructive commands (verified to prompt in auto mode); DEVDESK_GUARD and
  guard.local.
- State hook logs Bash commands and derives host tags (ssh targets, CT/VM
  ids); --list carries tags, --peek the last commands; UI shows both.

Closes #21
Closes #18
Closes #27

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

web/editor/index.js

@@ -135,10 +135,17 @@ function baseExtensions(path, { readOnly = true, wrap = false } = {}) {
   ];
 }
 
+// Put the cursor on a line (1-based) and scroll it to the middle.
+function gotoLine(view, line) {
+  const target = view.state.doc.line(Math.max(1, Math.min(line, view.state.doc.lines)));
+  view.dispatch({ selection: { anchor: target.from, head: target.to }, effects: EditorView.scrollIntoView(target.from, { y: 'center' }) });
+  view.focus();
+}
+
 // Read-only view of a file.
 export function viewer(parent, { doc, path, wrap }) {
   const view = new EditorView({ parent, state: EditorState.create({ doc, extensions: baseExtensions(path, { wrap }) }) });
-  return { view, destroy: () => view.destroy() };
+  return { view, goto: (line) => gotoLine(view, line), destroy: () => view.destroy() };
 }
 
 // Editable file (devdesk#20): onChange(text) after every edit, onSave() on
@@ -159,6 +166,7 @@ export function editor(parent, { doc, path, wrap, onChange, onSave }) {
   });
   return {
     view,
+    goto: (line) => gotoLine(view, line),
     text: () => view.state.doc.toString(),
     // Replace the whole document (reload from disk) keeping the cursor roughly where it was.
     setText: (text) => {