work-board: consume @luxfi/ui@7.4.0 from npm + drop local line-height pin

Phase-1 built @luxfi/ui locally and consumed it via `file:`, which blocked the
merge. 7.4.0 is now published to npm WITH dist/ (real tarball, 192 dist entries)
via the KMS-gated release path, so switch the dep `file:` -> `@luxfi/ui@7.4.0`
(exact, matching the sibling @hanzogui pins). package-lock now resolves the
registry tarball (integrity sha512-LfUYgZFP…).

Drop the local `body .font_body { line-height: 1.5 }` pin from src/index.css:
7.4.0's AppProvider now ships that Tailwind-Preflight reset itself (injected once
via useInsertionEffect), so every consumer — not just the work-board — inherits
it. One place, one way.

Verified against the npm package: build green (tsc + vite 8.1.5, 1622 modules);
visual-regression 25/25 goldens within 2% (21 zoo + 4 pars white-label), incl.
the task-detail sheet + ⌘K palette overlays that the pin originally fixed.

Co-authored-by: Hanzo Dev <dev@hanzo.ai>

package.json

@@ -17,7 +17,7 @@
     "@hanzogui/lucide-icons-2": "7.3.0",
     "@hanzogui/themes": "7.3.0",
     "@hanzogui/web": "7.3.0",
-    "@luxfi/ui": "file:/Users/z/work/luxfi/ui/packages/ui",
+    "@luxfi/ui": "7.4.0",
     "@tanstack/react-query": "^5.76.0",
     "react": "^19.2.7",
     "react-dom": "^19.2.7",

src/index.css

@@ -40,20 +40,6 @@ body,
   height: 100%;
 }
 
-/* @hanzo/gui's GuiProvider wraps the app in a Tamagui `font_body` context that
-   pins an ABSOLUTE line-height (23px). That cascades into the work-board's
-   arbitrary-size text (e.g. the text-[11px] field labels in the task detail),
-   which carry no line-height utility of their own — making each ~6.5px too tall
-   and reflowing dense sheets. Restore proportional line-height so the app keeps
-   its native Dework text metrics; elements with a Tailwind text-* utility set
-   their own line-height and are unaffected. */
-body .font_body {
-  /* Match Tailwind Preflight's `html { line-height: 1.5 }` — the baseline the
-     work-board's arbitrary-size text (text-[11px] labels, etc.) was authored
-     against — instead of font_body's absolute 23px. */
-  line-height: 1.5;
-}
-
 body {
   margin: 0;
   background-color: var(--bg);