feat(git-status): configurable max repositories and git timeout; keep unreadable repos listed

Settings (per device): Git status: max repositories (1-50, default 12) and git timeout (5-120 s, default 30, was a fixed 10). Both go to /git-status and /git-diff as maxRepos / timeout query parameters, clamped server-side (an empty value means the default). A repository whose git status fails stays in the list with the reason instead of being dropped silently, shows as '? N' in the indicator, and the truncation line now names the limit and the setting. The discovery cache is keyed by the limit.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JrzFKEdBLwVfu6ev2ZscJS

docs/wiki/Settings-Reference.md

@@ -66,7 +66,11 @@ bottom bar, off by default and per device. It reads `● N` uncommitted files, `
 pushed, `⚠ N` merge conflicts, or `✓` when everything is committed and pushed. Click it for the
 Git window; see [Working With Files](Working-With-Files#git-changes). **Git status: group files
 by folder** (per device, on by default) shows changed files under collapsed folders in that
-window; off lists every file by its full path.
+window; off lists every file by its full path. **Git status: max repositories** (per device,
+1 to 50, default 12) is how many repositories the window lists when a session's folder holds
+several projects. **Git status: git timeout** (per device, 5 to 120 seconds, default 30) is how
+long one git command may run before that repository is reported as unreadable; raise it for
+repositories on a slow network share.
 
 Most default to off. The stock desktop header is system stats, File Viewer, and the gear.
 New header controls never appear on phones. Split is desktop-only regardless of this

docs/wiki/Working-With-Files.md

@@ -187,7 +187,10 @@ Click it for a draggable window, in the style of the File Viewer:
   **Open file** jumps to the File Viewer; **Back** returns to the list. A binary file shows a
   note instead, and a diff over 400 KB is cut short.
 - A session folder that holds several projects gets one collapsible section per repository
-  found up to two levels down. They all start collapsed (each summary line shows its branch and
+  found up to two levels down (up to **Git status: max repositories**, 12 by default; the window says
+  when there are more). A repository git could not read, typically a timeout on a slow network
+  share, is listed with the reason and counted as `? N` in the bottom-bar indicator, never silently
+  left out; the **git timeout** setting raises how long it waits. They all start collapsed (each summary line shows its branch and
   what is outstanding), and the ones you open stay open when the window refreshes; an unrelated repository above the workspace (a dotfiles repo
   in your home folder) is ignored.