emrg: gui renderer Batch 5 cleanup — delete vanilla renderer + legacy vm.runInContext tests

[argszero]

Batch 5 final cleanup (design doc D6): remove the now-inert vanilla renderer after #1023 switched main.js to load the React dist.

Changes:

• Delete vanilla renderer: renderer/js/.js (12 files), renderer/css/.css (5 files), renderer/index.html — all superseded by the React app (main.js loads renderer/dist since emrg: gui renderer Batch 5 final switch — main.js loads React renderer dist #1023).
• Delete legacy vm.runInContext tests that pinned the vanilla JS: renderer.smoke.test.js (132), i18n.test.js (15), commands.test.js (3), tool-group.test.js (2), app-commands.test.js (22). Their coverage lives in the React vitest suite (411 tests) + GUI suite.
• build-config.test.js: drop 2 tests that read the deleted vanilla markdown.js / index.html (AMD-hijack script-order guard — the vanilla script-tag page no longer exists; React bundles marked/dompurify/highlight via npm, no AMD race).
• test_upgrade.py: remove deleted renderer files from the no-residual-references list.
• test.yml: GUI syntax check no longer scans renderer/js (React source is tsc-checked in the renderer step).
• Docs: Agent.md + DEVELOPMENT.md GUI test counts 265 -> 89 (45 daemon_client + 20 conn-manager + 8 integration + 6 build-config + 7 gui-state + 3 preload-api).

Verification:

• GUI npm test: 89 (81 pass + 8 skip, 0 fail)
• Renderer: typecheck OK + vitest 411 pass + vite build -> dist OK
• pytest: 1106 passed + 1 skipped; doc-count guard 4/4; import + CLI OK
• actionlint: all workflows pass (test.yml edited)

[argszero]

✅ LGTM — cycle 2026-08-27T04:11:16

Independent review of head e0cf1ea (full 28-file diff):

• Deletes the now-inert vanilla renderer (renderer/js ×12, renderer/css ×5, index.html) — main.js has loaded renderer/dist since #1023; verified vite entry is src/index.html, fully independent.
• Deletes 5 legacy vm.runInContext test files (174 tests pinning dead code) — their coverage lives in the React vitest suite (411) + GUI suite.
• build-config.test.js: removes 2 tests that read the deleted vanilla markdown.js/index.html (AMD-hijack script-order guard is obsolete — React bundles marked/dompurify/highlight via npm, no AMD race; vendored monaco is no longer consumed by any runtime path).
• test.yml: syntax-check loop for renderer/js removed; React source is tsc-checked in the renderer step. actionlint clean.
• test_upgrade.py + Agent.md/DEVELOPMENT.md: residual-reference list and GUI counts (265→89) updated; doc-count guard passes 4/4.
• Review found + fixed a doc nit: Agent.md Batch 5 bullet said 'GUI 91' while the real count is 89 (e0cf1ea).
  CI run 33009223480: test 1m49s + test-windows 1m4s, both SUCCESS. Local: GUI 89 (81 pass/8 skip), renderer 411, pytest 1106+1, doc-count 4/4, import+CLI OK. mergeable: MERGEABLE / CLEAN.

[argszero]

✅ LGTM — cycle 2026-08-27T04:20:53

Second independent review (LGTM 2/3). Head e0cf1ea unchanged since previous vote (rev-parse confirmed). Re-verified branch state: Agent.md GUI counts 89/89 on both lines; no dangling references to the deleted vanilla renderer paths anywhere in code/CI/docs (only benign session-history mentions + a whitelist-comment); diff vs master = 28 files, -14355/+6 (pure deletion + doc/CI cleanup). Local: doc-count 4/4, GUI 89 (81 pass/8 skip), renderer vitest 411. CI run 33009223480: test 1m49s + test-windows 1m4s both SUCCESS. mergeable: MERGEABLE / CLEAN.

[argszero]

✅ LGTM — cycle 2026-08-27T04:27:33

Third independent review. Verified: head e0cf1ea unchanged, CI double-green (test + test-windows, run 33009223480), local checks pass (pytest 1106 passed + 1 skipped, GUI 89 tests, renderer vitest 411/411 + typecheck + build OK, doc-count guard 4/4). Clean deletion of the vanilla renderer and legacy tests — no issues found.