fix: use bot token for issue creation and link PRs to tracking issues

Three fixes in the upstream-sync workflow:

1. Replace github.token with CLAUDE_BOT_TOKEN in the check-upstream
   job. The default runner token on Forgejo doesn't have issue-write
   permissions, so issues were silently failing to create.

2. Output the tracking issue number from check-upstream and pass it
   to the merge-upstream job. Claude's prompt now includes the issue
   reference and instructs it to add "Closes #N" in the PR body.

3. Capture the issue number from both create and update paths so
   the merge job always has it available.

Also cleaned up 6 duplicate upstream-sync labels created by previous
runs that used the unprivileged token.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.forgejo/kcl-ci/main.k

@@ -232,6 +232,7 @@ _claude_action_url = h.gha_action_url("actions", "claude-code-action", versions.
 _merge_branch_ref = h.gha_steps("prepare", "branch")
 _merge_behind_ref = h.gha_needs("check-upstream", "behind")
 _merge_ahead_ref = h.gha_needs("check-upstream", "ahead")
+_merge_issue_ref = h.gha_needs("check-upstream", "issue_number")
 _merge_clean_ref = h.gha_steps("prepare", "merge_clean")
 _merge_affected_ref = h.gha_steps("prepare", "affected_files")
 
@@ -241,6 +242,7 @@ You are automating an upstream sync for our Forgejo fork of anthropics/claude-co
 ## Current state
 - Branch: ${_merge_branch_ref}
 - ${_merge_behind_ref} commits behind upstream, ${_merge_ahead_ref} commits ahead (our Forgejo changes)
+- Tracking issue: #${_merge_issue_ref}
 - Merge was attempted. Status: ${_merge_clean_ref} (true = clean, false = has conflicts)
 
 ## Impact analysis
@@ -276,6 +278,7 @@ The fewer upstream files we modify, the fewer conflicts in the next sync.
    Auth: token ${"$"}GITHUB_TOKEN
    Title: "chore: merge ${_merge_behind_ref} upstream commits from anthropics/claude-code-action"
    Body should include:
+   - "Closes #${_merge_issue_ref}" on its own line (links PR to the tracking issue)
    - Summary of notable upstream changes
    - Impact assessment: which fork files (if any) were affected
    - List of conflicts resolved (if any)
@@ -301,6 +304,7 @@ _upstream_sync_workflow = {
                 needs_sync = h.gha_steps("compare", "needs_sync")
                 behind = h.gha_steps("compare", "behind")
                 ahead = h.gha_steps("compare", "ahead")
+                issue_number = h.gha_steps("sync-issue", "issue_number")
             }
             steps = [
                 checkout_mod.checkout() | {"with" = {"fetch-depth" = "0"}}
@@ -360,7 +364,7 @@ fi"""
                     id = "existing"
                     run = """\
 RESPONSE=${"$"}(curl -s \\
-  -H "Authorization: token ${h.gha_github("token")}" \\
+  -H "Authorization: token ${h.gha_secret("CLAUDE_BOT_TOKEN")}" \\
   -H "Content-Type: application/json" \\
   "${h.gha_env("GITHUB_API_URL")}/repos/${h.gha_github("repository")}/issues?state=open&labels=upstream-sync&limit=1")
 
@@ -382,7 +386,7 @@ fi"""
                     run = """\
 curl -s -o /dev/null -w "%{http_code}" \\
   -X POST \\
-  -H "Authorization: token ${h.gha_github("token")}" \\
+  -H "Authorization: token ${h.gha_secret("CLAUDE_BOT_TOKEN")}" \\
   -H "Content-Type: application/json" \\
   -d '{"name":"upstream-sync","color":"#0075ca","description":"Upstream sync tracking"}' \\
   "${h.gha_env("GITHUB_API_URL")}/repos/${h.gha_github("repository")}/labels" || true"""
@@ -390,6 +394,7 @@ curl -s -o /dev/null -w "%{http_code}" \\
                 {
                     name = "Create or update sync issue"
                     "if" = h.gha_steps_eq("compare", "needs_sync", "true")
+                    id = "sync-issue"
                     run = """\
 BEHIND="${h.gha_steps("compare", "behind")}"
 AHEAD="${h.gha_steps("compare", "ahead")}"
@@ -448,19 +453,22 @@ if [ "${h.gha_steps("existing", "issue_exists")}" = "true" ]; then
   ISSUE_NUMBER="${h.gha_steps("existing", "issue_number")}"
   curl -s -o /dev/null \\
     -X PATCH \\
-    -H "Authorization: token ${h.gha_github("token")}" \\
+    -H "Authorization: token ${h.gha_secret("CLAUDE_BOT_TOKEN")}" \\
     -H "Content-Type: application/json" \\
     -d "${"$"}(jq -n --arg title "${"$"}TITLE" --arg body "${"$"}BODY" '{title: ${"$"}title, body: ${"$"}body}')" \\
     "${h.gha_env("GITHUB_API_URL")}/repos/${h.gha_github("repository")}/issues/${"$"}{ISSUE_NUMBER}"
   echo "Updated existing issue #${"$"}{ISSUE_NUMBER}"
+  echo "issue_number=${"$"}{ISSUE_NUMBER}" >> "${"$"}GITHUB_OUTPUT"
 else
-  curl -s -o /dev/null \\
+  RESPONSE=${"$"}(curl -s \\
     -X POST \\
-    -H "Authorization: token ${h.gha_github("token")}" \\
+    -H "Authorization: token ${h.gha_secret("CLAUDE_BOT_TOKEN")}" \\
     -H "Content-Type: application/json" \\
     -d "${"$"}(jq -n --arg title "${"$"}TITLE" --arg body "${"$"}BODY" '{title: ${"$"}title, body: ${"$"}body, labels: [{"name": "upstream-sync"}]}')" \\
-    "${h.gha_env("GITHUB_API_URL")}/repos/${h.gha_github("repository")}/issues"
-  echo "Created new upstream sync issue"
+    "${h.gha_env("GITHUB_API_URL")}/repos/${h.gha_github("repository")}/issues")
+  ISSUE_NUMBER=${"$"}(echo "${"$"}RESPONSE" | jq '.number')
+  echo "Created new upstream sync issue #${"$"}{ISSUE_NUMBER}"
+  echo "issue_number=${"$"}{ISSUE_NUMBER}" >> "${"$"}GITHUB_OUTPUT"
 fi"""
                 }
             ]