Upgrade Effect to beta.103 - #5331

## What's Changed
* fix(web): blink the terminal cursor again by @StiensWout in pingdotgg/t3code#5314
* fix(terminal): protect held Ctrl/Cmd+W close shortcut by @StiensWout in pingdotgg/t3code#5322
* fix(server): strip replayable terminal queries from history by @StiensWout in pingdotgg/t3code#5319
* fix(contracts): decode ServerProviders forward-compatibly by @Brechard in pingdotgg/t3code#5327
* fix(web): simplify chat code blocks by @t3-code[bot] in pingdotgg/t3code#5301
* fix(web): align multiline error alert controls by @t3-code[bot] in pingdotgg/t3code#5304
* Upgrade Effect to beta.103 by @juliusmarminge in pingdotgg/t3code#5331

## New Contributors
* @Brechard made their first contribution in pingdotgg/t3code#5327

**Full Changelog**: pingdotgg/t3code@v0.0.32-nightly.20260804.993...v0.0.32-nightly.20260804.997

Upstream release: https://github.com/pingdotgg/t3code/releases/tag/v0.0.32-nightly.20260804.997

Brings in 17 upstream commits (base e60821f). Headline changes:

- Upgrade Effect to beta.103 (pingdotgg#5331), which removes the
  `Schema.UnknownFromJsonString` export and drops the positional actual
  argument from `SchemaIssue.InvalidValue`.
- Replace the hand-rolled gzip path with `HttpMiddleware.compression()`,
  deleting apps/server/src/httpCompression/ entirely (pingdotgg#5331).
- Extract desktop base/state dir resolution into DesktopStatePaths.ts, and
  add Linux secret storage, URL-scheme claiming, and early-startup modules
  (pingdotgg#2916, pingdotgg#5054).
- Mobile provider icons for Grok, Cursor, and OpenCode (pingdotgg#4586).
- Web polish: chat code blocks, tooltip z-index, spacing, loading screen,
  terminal cursor blink, terminal close-shortcut guard.

Manual resolution and why:

- apps/desktop/src/app/DesktopEnvironment.ts — semantic. Upstream deleted
  the `configuredBaseDir` local that the fork's branding override sat on
  top of, moving that logic into resolveDesktopBaseDir/resolveDesktopStateDir.
  Took upstream's extraction wholesale and re-applied the fork's
  displayNameOverride intent on it. The fork additionally gains upstream's
  trimming of a blank T3_HOME, which the old inline version did not do.

- apps/mobile/src/components/ProviderIcon.tsx — the fork had replaced raw
  `props.provider === ...` checks with a resolveProviderIconKind seam;
  upstream's three new icons used the raw form. Routed them through the
  seam instead of mixing both styles, extended ProviderIconKind, and added
  test coverage so the new kinds cannot silently fall back to the OpenAI
  icon.

- apps/server/src/textGeneration/CodexTextGeneration.ts — mechanical. Took
  upstream's one-line Schema change, kept the fork's rewrite of the rest.

Merge-caused fixes beyond the conflicts:

- Swept 15 fork-only call sites from `Schema.UnknownFromJsonString` to
  `Schema.fromJsonString(Schema.Unknown)`. These produced no conflict
  markers; the export simply no longer exists in beta.103. Upstream's own
  OrchestrationEventStore.ts survives only because it defines a local
  alias of the same name.

Verified: pnpm install, pnpm typecheck (15/15 projects clean), pnpm test.
Five failures remain in packages/shared (relayClient, logging); those four
files are byte-identical to both upstream/main and the pre-merge backup,
and assert POSIX-only behavior (linux-x64 fixture paths, forward-slash
path comparisons, ENAMETOOLONG). They cannot pass on Windows and are
unrelated to this merge.

Backup of the pre-merge tip: backup/dev-before-merge-20260804