fix(ui): show project names exactly as the folder is named

Auto-derived project labels were title-cased, turning .ssh into .Ssh and
opencode-claude into Opencode Claude. Show the folder name verbatim in the
sidebar, window title, settings selector and notification templates, and
migrate persisted legacy labels back to the folder name (manual renames
are preserved).

packages/ui/src/stores/useProjectsStore.ts

@@ -166,14 +166,22 @@ const normalizeProjectPath = (value: string): string => {
   return normalized.length > 1 ? normalized.replace(/\/+$/, '') : normalized;
 };
 
+// Folder names are shown verbatim: title-casing them turned `.ssh` into `.Ssh`
+// and made every project look like a name the user never chose.
 const deriveProjectLabel = (path: string): string => {
   const normalized = normalizeProjectPath(path);
   if (!normalized || normalized === '/') {
     return 'Root';
   }
   const segments = normalized.split('/').filter(Boolean);
-  const raw = segments[segments.length - 1] || normalized;
-  return raw.replace(/[-_]/g, ' ').replace(/\b\w/g, (c) => c.toUpperCase());
+  return segments[segments.length - 1] || normalized;
+};
+
+// Labels auto-derived by older versions were title-cased and persisted. Drop
+// them back to the folder name; labels the user typed themselves are kept.
+const legacyAutoProjectLabel = (path: string): string => {
+  const derived = deriveProjectLabel(path);
+  return derived.replace(/[-_]/g, ' ').replace(/\b\w/g, (c) => c.toUpperCase());
 };
 
 const sanitizeProjectIconImage = (value: unknown): ProjectEntry['iconImage'] | undefined => {
@@ -261,7 +269,10 @@ const sanitizeProjects = (value: unknown): ProjectEntry[] => {
     };
 
     if (typeof candidate.label === 'string' && candidate.label.trim().length > 0) {
-      project.label = candidate.label.trim();
+      const storedLabel = candidate.label.trim();
+      project.label = storedLabel === legacyAutoProjectLabel(normalizedPath)
+        ? deriveProjectLabel(normalizedPath)
+        : storedLabel;
     }
     if (typeof candidate.icon === 'string' && candidate.icon.trim().length > 0) {
       project.icon = candidate.icon.trim();