Feature: text color picker in the composer toolbar

The rich-text editor already registers the TextStyle and Color
extensions so that colored text pasted or quoted from incoming mail
survives editing - but there was no way to set a color yourself.

Adds a "Text color" toolbar button next to the strikethrough control,
wired to the already-loaded extensions: a 2x8 preset swatch grid plus a
"Remove color" entry, following the table button's dropdown pattern
(wrapper ref, outside-click close, same popover styling) and the table
size picker's swatch grid. The button's baseline icon renders in the
currently active color, so the selection is visible without any extra
indicator element.

No new dependencies and no locale changes; the toolbar titles in this
file are plain English throughout, and Clear Formatting already removes
colors via unsetAllMarks.

components/email/rich-text-editor.tsx

@@ -41,6 +41,7 @@ import {
   Heading1,
   Heading2,
   Table as TableIcon,
+  Baseline,
   Trash2,
   Rows3,
   Columns3,
@@ -143,6 +144,14 @@ function ToolbarSeparator() {
 const TABLE_PICKER_ROWS = 6;
 const TABLE_PICKER_COLS = 8;
 
+// Preset text colours (2 x 8). Inline `style="color: …"` survives email
+// round-trips; the TextStyle/Color extensions are already registered to
+// preserve pasted colours - this palette just adds a UI to set them.
+const TEXT_COLORS = [
+  "#000000", "#5f6368", "#9aa0a6", "#c5221f", "#e8710a", "#f9ab00", "#188038", "#1967d2",
+  "#7627bb", "#c2185b", "#795548", "#fa5252", "#fd7e14", "#40c057", "#4dabf7", "#e64980",
+];
+
 function TableSizePicker({ onPick }: { onPick: (rows: number, cols: number) => void }) {
   const [hover, setHover] = useState<{ r: number; c: number } | null>(null);
   return (
@@ -336,6 +345,19 @@ export function RichTextEditor({
 
   const [tableMenuOpen, setTableMenuOpen] = useState(false);
   const tableWrapperRef = useRef<HTMLDivElement>(null);
+  const [colorMenuOpen, setColorMenuOpen] = useState(false);
+  const colorWrapperRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    if (!colorMenuOpen) return;
+    const handler = (e: MouseEvent) => {
+      if (colorWrapperRef.current && !colorWrapperRef.current.contains(e.target as Node)) {
+        setColorMenuOpen(false);
+      }
+    };
+    document.addEventListener("mousedown", handler);
+    return () => document.removeEventListener("mousedown", handler);
+  }, [colorMenuOpen]);
 
   useEffect(() => {
     if (!tableMenuOpen) return;
@@ -386,6 +408,49 @@ export function RichTextEditor({
         >
           <Strikethrough className="w-4 h-4" />
         </ToolbarButton>
+        <div ref={colorWrapperRef} className="relative">
+          <ToolbarButton
+            active={!!editor.getAttributes("textStyle").color}
+            onClick={() => setColorMenuOpen((v) => !v)}
+            title="Text color"
+          >
+            {/* The icon itself previews the active colour - no layout shift. */}
+            <Baseline className="w-4 h-4" style={{ color: editor.getAttributes("textStyle").color || undefined }} />
+          </ToolbarButton>
+          {colorMenuOpen && (
+            <div className="absolute z-50 top-full left-0 mt-1 bg-popover border border-border rounded-md shadow-md p-2">
+              <div className="grid gap-0.5" style={{ gridTemplateColumns: "repeat(8, 1fr)" }}>
+                {TEXT_COLORS.map((color) => (
+                  <button
+                    key={color}
+                    type="button"
+                    title={color}
+                    onClick={() => {
+                      editor.chain().focus().setColor(color).run();
+                      setColorMenuOpen(false);
+                    }}
+                    className={cn(
+                      "w-4 h-4 border border-border/60 rounded-[2px] transition-transform hover:scale-110",
+                      editor.getAttributes("textStyle").color === color && "ring-1 ring-ring ring-offset-1"
+                    )}
+                    style={{ backgroundColor: color }}
+                  />
+                ))}
+              </div>
+              <div className="h-px bg-border my-1.5" />
+              <button
+                type="button"
+                className="flex items-center gap-2 px-2 py-1 text-sm rounded hover:bg-accent text-start w-full"
+                onClick={() => {
+                  editor.chain().focus().unsetColor().run();
+                  setColorMenuOpen(false);
+                }}
+              >
+                <RemoveFormatting className="w-4 h-4" /> Remove color
+              </button>
+            </div>
+          )}
+        </div>
 
         <ToolbarSeparator />