feat(sp6): Ticker Tape color tokens for Inbox

src/index.css

@@ -77,6 +77,24 @@
     --m-warning: #B45309;
     --m-warning-bg: #FFFBEB;
 
+    /* ------------------------------------------------------------------
+       SP6 Inbox — Ticker Tape palette
+       ------------------------------------------------------------------
+       Bloomberg-terminal vibe. Three accent rails (oxblood / amber /
+       ink-blue) on near-black surfaces. Prefixed `--tt-` to coexist
+       with the dark app shell tokens. The Inbox page is full-bleed
+       dark and reads as a separate working surface from the rest of
+       the app.
+       ------------------------------------------------------------------ */
+    --tt-bg: #0a0e14;
+    --tt-bg-elev: #11161f;
+    --tt-ink: #e6e1d3;
+    --tt-ink-dim: #8a8b8e;
+    --tt-amber: #f4b942;
+    --tt-oxblood: #8b2c2c;
+    --tt-ink-blue: #2c4a6e;
+    --tt-muted: #4a4d54;
+
     /* Modern type stack — UI sans + data mono. Fallbacks preserve the
        existing Geist Mono face for any element that hasn't opted in. */
     --m-font-sans: "Inter Tight", ui-sans-serif, system-ui, sans-serif;