docs(api): per-symbol pages, fuzzy search, deep token linking, hover cards

Rebuild the API Reference around one page per symbol and richer, verified content.

Pages & navigation
- One HTML page per symbol (kw-*, type-*, phase-*, screen-*, fn-*, annot-*, op-*)
  instead of a single scrolling page; namespace overview pages (ns-screen …
  ns-color) and a searchable index (api.html) with client-side fuzzy search.
- Sticky-header scroll offset (scroll-margin) so a jumped-to entry/param/color is
  never hidden, plus a flash highlight on the scrolled-to target.

Deep linking in every snippet & example
- Namespace members split: `Screen`→namespace page, `fill_rectangle`→method page;
  `Color`→palette page, `Charcoal`→its swatch — separately.
- Named arguments (`width:`) link to that parameter's anchor on the method page.
- Hover any token for a summary card built from the real API data (symbols.json).

Content & coverage
- Full authoritative surface documented from the compiler: every keyword, type,
  the 6 phases (Start/Input/FixedUpdate/Update/LateUpdate/Render, each its own
  page), all 22 annotations, namespace methods with parameter docs, builtins,
  the world_* reflection ABI, networking, operators — 155 symbols.
- Longer, clearer explanations; "model"/"model instance" terminology, not "entity";
  descriptive identifiers in every example (Position{column,row}, Velocity{delta_x,
  delta_y}, Health{current,maximum}, Player/Enemy) — no Pos/Seg/x/dx.
- Accuracy fixes from compiler ground-truth: world_count() takes no arg,
  world_query_next(property, cursor) arg order, event fields bind by name; dropped
  `when` and `module` (not in the self-hosted parser).

Tooling
- inventory.json + check.py: coverage guard (every symbol has a page), duplicate-
  token guard, and broken-link guard — fail CI so docs can't drift.
- validate.py: compiles every ```ludic example against bin/ludicc (158 compile).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docs/language/screen/screen-status.md

@@ -5,8 +5,29 @@ category: screen
 kind: namespace-method
 tokens: Screen.status
 sig: Screen.status(text)
-tip: Set the persistent one-line status/HUD string.
+tip: Set the persistent one-line status/HUD string shown by the runtime.
 order: 9
+ns: Screen
+member: status
 ---
 
-Set the persistent one-line status/HUD string.
+Sets a single persistent line of status text that the runtime displays outside your normal drawing — a lightweight HUD line for debugging or a title-bar style message. Unlike <code>Screen.draw_text</code>, it is not part of the framebuffer you clear and present each frame: you set it once (or whenever it changes) and it persists until you set it again. Use it for coarse status such as the current level, connection state, or a frame-rate readout while iterating. It takes a single string argument.
+
+Parameters:
+- `text` — the status line to display
+
+```ludic
+program StatusLine {
+  var elapsed_frames: int = 0
+
+  handler UpdateStatus phase Update {
+    elapsed_frames = elapsed_frames + 1
+    Screen.status(text: `frame {elapsed_frames}`)
+  }
+
+  handler DrawWorld phase Render {
+    Screen.clear(Color.MidnightBlue)
+    Screen.show()
+  }
+}
+```