[tianxiaochannel-oss88]

Summary

• Render pending approvals inside the normal conversation composer, matching channel behavior.
• Support expanding additional approvals, opening approval details, and approving or denying from the composer.
• Refresh the selected conversation after an approval is resolved so the card disappears immediately.

Verification

• Playwright: normal conversation renders inline approvals and resolves them from the composer — 1 passed.
• corepack pnpm --filter @ling-stack/web typecheck — passed.
• corepack pnpm --filter @ling-stack/web lint — passed.
• corepack pnpm --filter @ling-stack/web build — passed; existing large-chunk warning only.
• git diff --check — passed.

Scope

• 5 files changed, all limited to normal conversation approval projection, composer wiring, and regression coverage.
• Existing untracked apps/desktop/release.* directories were not included.