feat: integrate fork work onto upstream main (squashed)

Squash-merge of feat/autofix-pr-test (69 commits) onto upstream/main
with -X ours strategy (upstream as authoritative for content conflicts).

Key features brought in from fork:
- LocalMemoryRecall + VaultHttpFetch tools (end-to-end wired)
- /local-memory, /local-vault, /memory-stores, /skill-store interactive panels
- /agents-platform, /schedule, /vault command scaffolding
- /login: switch / replace / remove of workspace API key
- statusline refactor (built-in status row, /statusline as info command)
- autofix-pr command + workflow

Conflict resolutions (upstream-wins):
- 10 .js command stubs kept from upstream (alongside fork's .ts implementations)
- src/components/BuiltinStatusLine.tsx accepted upstream's deletion
  (fork's wire-up references in StatusLine.tsx will be cleaned up next)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/builtin-tools/src/tools/SkillTool/prompt.ts

@@ -26,7 +26,8 @@ export const DEFAULT_CHAR_BUDGET = 8_000 // Fallback: 1% of 200k × 4
 // full content on invoke, so verbose whenToUse strings waste turn-1 cache_creation
 // tokens without improving match rate. Applies to all entries, including bundled,
 // since the cap is generous enough to preserve the core use case.
-export const MAX_LISTING_DESC_CHARS = 250
+// v2.1.117: raised from 250 → 1536 to allow richer skill descriptions.
+export const MAX_LISTING_DESC_CHARS = 1536
 
 export function getCharBudget(contextWindowTokens?: number): number {
   if (Number(process.env.SLASH_COMMAND_TOOL_CHAR_BUDGET)) {