chore(release): v2.0.7 "Visible"

Hygiene release + two UI gap closures. Full CHANGELOG in CHANGELOG.md.

Version bumps:
- vestige-core: 2.0.6 -> 2.0.7
- vestige-mcp: 2.0.6 -> 2.0.7
- @vestige/dashboard: 2.0.6 -> 2.0.7
- @vestige/init: 2.0.6 -> 2.0.7
- vestige-mcp-server: 2.0.6 -> 2.0.7

Rebuild: pnpm --dir apps/dashboard run build regenerates apps/dashboard/build/**
with the v2.0.7 asset hashes.

Pre-release validation green:
- cargo check --workspace: clean
- cargo test -p vestige-core --lib: 366 passed
- cargo test -p vestige-mcp --lib: 425 passed
- pnpm run check (svelte-check): 580 files, 0 errors
- cargo clippy on touched crates: -D warnings clean
- 4-parallel-agent pre-merge audit passed (security, code quality,
  end-to-end flow, external verification). Two MEDIUM fixes landed
  in-branch before tag.

The 12 feature/fix commits on chore/v2.0.7-clean are preserved via
fast-forward merge so each logical change stays independently
revertible on main.

apps/dashboard/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vestige/dashboard",
-  "version": "2.0.6",
+  "version": "2.0.7",
   "private": true,
   "type": "module",
   "scripts": {