fix: v2.6.1 — panes start in their folder again after an update (#69), Changes panel stacks every repo, clickable paths in chat

- #69: tmux applies a pane's `-c` only while its server's own cwd exists.
  The server was forked from the dashboard's cwd (the plugin cache dir),
  outlives updates, and the old cache dir is pruned — after that every new
  pane started in a deleted directory, where `claude` died at once ("run not
  found") and a shell printed getcwd errors. tmux calls now run from `/`,
  and the pane's sh wrapper cds into its folder itself, which also heals a
  tmux server that is already stuck.
- Changes panel: a workspace's extra folders are sections stacked under the
  workspace folder (VS Code Source Control style), with Close repository /
  Close other repositories on a header's right-click.
- Chat: URLs and absolute paths are links; Claude Code's `[Image: source:]`
  line folds into its turn; uploads under `<data dir>/drops/` are listed.
- Update check: a checkout holding commits a newer release lacks reports
  `diverged_from_release` instead of offering a fast-forward that can only fail.

client/src/components/conversation/MarkdownContent.tsx

@@ -4,7 +4,9 @@
  * subset of CommonMark + GFM that actually appears in Claude Code transcripts:
  * fenced code blocks, ATX headings, ordered/unordered lists, task lists, blockquotes,
  * horizontal rules, simple tables, inline code, bold, italic, strikethrough, links,
- * and auto-linked URLs.
+ * and auto-linked URLs. An absolute file path (bare or in inline code) opens
+ * through `OpenFileContext` when the page provides one; `linkify` does the
+ * same links for plain text.
  *
  * Output is built as a React element tree (no dangerouslySetInnerHTML) so user content
  * is escaped by React. Code blocks delegate to <CodeBlock /> for syntax highlighting and
@@ -244,6 +246,71 @@ function parseBlocks(src: string): Block[] {
   return blocks;
 }
 
+/** Opens a file a message names; provided by a view that can show one. */
+export const OpenFileContext = React.createContext<((path: string) => void) | undefined>(undefined);
+
+const LINK_CLASS =
+  "text-violet-700 dark:text-violet-300 hover:text-violet-800 dark:hover:text-violet-200 underline underline-offset-2 decoration-violet-400/40 hover:decoration-violet-300/70 break-all";
+const URL_RE = /^https?:\/\/[^\s<>()]+[^\s<>().,!?;:'"]/;
+// Two segments at least, so "/" or "/s" stays text; a trailing full stop is prose.
+const PATH_RE = /^(?:\/[^\s/<>()'"`,;:]*[^\s/<>()'"`,;:.!?]){2,}/;
+// A link starts a word: "and/or" or "a/b/c" stays text.
+const atWordStart = (text: string, i: number) => i === 0 || /[\s([{"'`]/.test(text[i - 1]!);
+
+function UrlLink({ url }: { url: string }) {
+  return (
+    <a href={url} target="_blank" rel="noopener noreferrer" className={LINK_CLASS}>
+      {url}
+    </a>
+  );
+}
+
+/** A path as a button that opens it, or as it was when nothing can. */
+function PathLink({ path, children }: { path: string; children: React.ReactNode }) {
+  const open = React.useContext(OpenFileContext);
+  if (!open) return <>{children}</>;
+  return (
+    <button
+      type="button"
+      title={path}
+      onClick={() => open(path)}
+      className={`${LINK_CLASS} text-left`}
+    >
+      {children}
+    </button>
+  );
+}
+
+/** Plain text with its URLs and absolute paths as links — nothing else parsed. */
+export function linkify(text: string): React.ReactNode[] {
+  const out: React.ReactNode[] = [];
+  let buf = "";
+  for (let i = 0; i < text.length;) {
+    const rest = text.slice(i);
+    const url = atWordStart(text, i) && URL_RE.exec(rest)?.[0];
+    const path = !url && atWordStart(text, i) && PATH_RE.exec(rest)?.[0];
+    const hit = url || path;
+    if (!hit) {
+      buf += text[i++];
+      continue;
+    }
+    if (buf) out.push(buf);
+    buf = "";
+    out.push(
+      url ? (
+        <UrlLink key={i} url={url} />
+      ) : (
+        <PathLink key={i} path={hit}>
+          {hit}
+        </PathLink>
+      )
+    );
+    i += hit.length;
+  }
+  if (buf) out.push(buf);
+  return out;
+}
+
 /** Render inline markdown (bold/italic/code/strikethrough/links/auto-links). */
 function renderInline(text: string, baseKey = ""): React.ReactNode[] {
   const out: React.ReactNode[] = [];
@@ -267,11 +334,18 @@ function renderInline(text: string, baseKey = ""): React.ReactNode[] {
     // Inline code: `...`
     const codeM = rest.match(/^`([^`\n]+)`/);
     if (codeM) {
-      push(
+      const code = (
         <code className="rounded bg-surface-4 border border-surface-3 px-1.5 py-0.5 font-mono text-[12.5px] text-status-warning">
           {codeM[1]}
         </code>
       );
+      push(
+        PATH_RE.exec(codeM[1]!)?.[0] === codeM[1] ? (
+          <PathLink path={codeM[1]!}>{code}</PathLink>
+        ) : (
+          code
+        )
+      );
       i += codeM[0].length;
       continue;
     }
@@ -330,22 +404,21 @@ function renderInline(text: string, baseKey = ""): React.ReactNode[] {
     }
 
     // Auto-link
-    const urlM = rest.match(/^https?:\/\/[^\s<>()]+[^\s<>().,!?;:'"]/);
+    const urlM = rest.match(URL_RE);
     if (urlM) {
-      push(
-        <a
-          href={urlM[0]}
-          target="_blank"
-          rel="noopener noreferrer"
-          className="text-violet-700 dark:text-violet-300 hover:text-violet-800 dark:hover:text-violet-200 underline underline-offset-2 decoration-violet-400/40 hover:decoration-violet-300/70 break-all"
-        >
-          {urlM[0]}
-        </a>
-      );
+      push(<UrlLink url={urlM[0]} />);
       i += urlM[0].length;
       continue;
     }
 
+    // An absolute path at a word start
+    const pathM = atWordStart(text, i) ? PATH_RE.exec(rest) : null;
+    if (pathM) {
+      push(<PathLink path={pathM[0]}>{pathM[0]}</PathLink>);
+      i += pathM[0].length;
+      continue;
+    }
+
     buf += text[i]!;
     i++;
   }