Scope repository favorites by pane

TESTING.md

@@ -146,7 +146,8 @@ xcrun simctl launch booted de.rfc1437.gotcha
 
 - [ ] The repository list shows name, description, language, open count, update
       date, and current favorite state.
-- [ ] Toggle a favorite and confirm it remains after refresh and relaunch.
+- [ ] Toggle a favorite and confirm it remains after refresh and relaunch but
+      does not change the same repository's favorite in Repos or Milestones.
 - [ ] Open a repository; the issue list defaults to the saved Open/Closed filter.
 - [ ] Repository issue rows and issue rows inside a milestone show a green open
       or purple closed icon beside the title; mixed milestone results use the
@@ -197,7 +198,8 @@ xcrun simctl launch booted de.rfc1437.gotcha
 
 ## Repositories and commits
 
-- [ ] The repository list and favorite behavior match the Issues tab.
+- [ ] The repository list and favorite behavior match the Issues tab. Toggle a
+      favorite and confirm it persists without affecting Issues or Milestones.
 - [ ] Open a repository; commit history initially selects **All**, visibly shows
       All in the navigation bar, and includes commits from multiple branches.
 - [ ] Open the branch menu; All is checked. Select a branch and verify the label,
@@ -273,6 +275,8 @@ xcrun simctl launch booted de.rfc1437.gotcha
 
 - [ ] Milestones uses the server → repository → milestone flow and includes
       both open and closed milestones.
+- [ ] Toggle a repository favorite and confirm it persists after refresh and
+      relaunch without affecting the same repository in Issues or Repos.
 - [ ] Each milestone shows its title, description, state, due date, issue
       counts, and a green/amber closed/open progress bar.
 - [ ] Open a milestone and verify every assigned issue and pull request is