Pulls in 83 upstream commits (provider/model fixes, stats/console
updates, docs) since the last sync. Most changes land in packages/web,
packages/console, and packages/stats, which this fork doesn't touch.

5 real conflicts, resolved:
- packages/app/package.json, packages/desktop/package.json: kept our
  version numbers (1.21.0) over upstream's tracking version (1.18.21)
  — this fork bumps independently per its own release process.
- packages/app/src/components/dialog-select-server.tsx: kept our v2
  migration (Field/TextInputV2, done in the UI/UX epic) over upstream's
  edit to the legacy TextField version of the same file. Upstream's
  underlying fix ("keep server details editable", anomalyco#43169 — switching
  name/username/password from controlled `value` to `defaultValue` to
  stop external re-renders from clobbering in-progress typing) was a
  real bug fix against their TextField component; ported the same
  value->defaultValue swap here, but TextInputV2's props don't support
  defaultValue (different component, native <input> passthrough), so
  reverted those three fields back to `value` after typecheck caught
  the mismatch — no evidence TextInputV2 has the same staleness bug in
  the first place, given it doesn't intercept `value` the way
  TextField did.
- packages/app/src/pages/session/timeline/message-timeline.tsx:
  upstream extracted the same archive-session logic we already had
  inline into a shared `useSessionArchive()` hook (also now used by
  use-session-commands.tsx, which merged in cleanly using it) — adopted
  the hook and dropped our now-redundant inline `archiveSession`, while
  keeping our `useSessionLayout` naming and the menu icons added in the
  UI/UX epic (#1).
- bun.lock: regenerated via `bun install` after resolving the above.

Verified: typecheck green across app/opencode/core/sdk/desktop.
packages/opencode test/tool/task.test.ts and test/session/prompt.test.ts
both have pre-existing failures unrelated to this merge, confirmed via
a throwaway worktree of the pre-merge dev HEAD (e57da01) — same
failures reproduce there with zero merge changes applied.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>