fix(workspace): fold case fully when comparing workspace names

Lower-casing alone leaves `Straße` and `STRASSE` different; upper-casing first
gives full case folding, so a namesake that differs only by case is found.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0172qrhMa5TQgETASi5hxMqD

Author: ralphstodomingo

packages/opencode/src/altimate/workspace/workspace-name.ts

@@ -49,12 +49,14 @@ export function workspaceLabel(name: string, id: string | undefined, budget = MA
 }
 
 /** A name as the link pickers compare it: control characters and runs of whitespace
- * collapsed, trimmed, case folded. */
+ * collapsed, trimmed, case folded. Upper-casing first gives full case folding, so
+ * `Straße` and `STRASSE` compare equal; lower-casing alone would not. (codex) */
 function comparableName(name: string): string {
   return name
     .replace(/[\u0000-\u001F\u007F-\u009F\u2028\u2029]+/g, " ")
     .replace(/\s+/g, " ")
     .trim()
+    .toUpperCase()
     .toLowerCase()
 }
 

packages/opencode/test/altimate/workspace/same-named-workspace.test.ts

@@ -12,6 +12,7 @@ describe("sameNamedWorkspace", () => {
   test.each([
     ["exact name", [ws(1, "analytics")], "analytics", 1],
     ["case differs", [ws(1, "Analytics")], "analytics", 1],
+    ["case differs beyond ASCII (full case folding)", [ws(1, "Straße")], "STRASSE", 1],
     ["surrounding and inner whitespace differ", [ws(1, "  data   platform ")], "data platform", 1],
     ["a control character in the listed name", [ws(1, "analy\u0007tics")], "analy tics", 1],
     ["no workspace has the name", [ws(1, "marketing"), ws(2, "finance")], "analytics", undefined],