Deed v0.1.3

A reliability + UX release: per-request configuration, a leaner build, and big stability fixes for streaming, caching, and window/teardown.

✨ New

Per-request Config tab — every request now has a Config tab (sits right before the cURL button) with two settings:
- timeout_ms — request timeout / gRPC deadline / WebSocket idle timeout
- tls — verify TLS cert (HTTP/WS/GraphQL) or use a TLS channel (gRPC)
  Settings are saved per request and applied across all transports.
Pixel-rounded window corners — new SQUARE_CORNERS=2 mode draws retro, non-anti-aliased (chunky) rounded corners. Tune with CORNER_RADIUS_PX (corner size) and CORNER_STEP_PX (stair size). 0 = system rounded, 1 = square (default), 2 = pixel-rounded.

Environments are now all equal — removed the special "Global/Local" base environment. Every environment is a normal column you can rename and delete; an environment's name is simply its filename. Variables resolve from the selected environment only (pick one from the ENV dropdown).
gRPC TLS moved from the toolbar toggle into the per-request Config tab (tls). The old toggle is gone; the global default_timeout_ms setting was removed in favor of per-request timeout_ms.
Default window width increased 1040 → 1280.
Left (request) pane now defaults to half the width of the right (response) pane (1:2).
GraphQL "Variables" tab renamed to "Vars".

Streaming responses (SSE / gRPC-stream / WebSocket) survive an app restart — the disk-cache index is now written through on every store and flushed on quit, so a cached stream response is no longer lost when you close and reopen the app.
Two-tier cache hardening — accurate RAM accounting (no longer silently exceeds the cap), durable index writes, and removal of stale/orphaned cache files; cache filename is now just the request id.
No more use-after-free on close — closing a window/tab while a request or stream is in flight is now safe; streams/sessions run on dedicated threads and are cancelled + drained cleanly on shutdown.
Robustness — depth-guarded JSON parsing (no stack-overflow crash on hostile/huge input), atomic+fsync file writes (no data loss on crash), and gRPC reflection teardown that can't hang.
Cache size now always comes from your app settings, clamped by the .env ceiling (raised so your setting isn't overridden).

Simplified Makefile — just four commands: make help, make setup, make build (→ signed dist/deed.app), make test.
Lighter repo via CMake FetchContent — Scintilla/Lexilla editor sources are no longer vendored in git; CMake downloads the pinned versions (SHA-256 verified) into build/_deps and applies local patches automatically at configure time.
Warning-free build — make build produces zero compiler warnings (including fixes for macOS 12 deprecations in the vendored editor).
Core split into smaller headers/translation units; transport dispatch stays registry-based.

Full Changelog: v0.1.2...v0.1.3