Polish: session names take 900 weight serif-off; floating controls match graph chrome

- .font-title now requests font-weight: 900 — with the serif toggle OFF,
  the prose font is a VARIABLE font and was rendering titles at 400, a
  whisper next to CMU's bold-only face; 900 lands directly on Source
  Sans 3 and CMU's single 700 face snaps to nearest, unchanged. Same
  rendering with serif on, real weight with it off.
- The model + thinking pills match the graph view's floating top-right
  chrome (import notes / gear / coverage): border bg-card/85 shadow-lg
  backdrop-blur — the graph no longer bleeds through the pills.
- The dictate button gets the same blurring at lower opacity
  (bg-card/50 backdrop-blur), staying quieter than the model pills.

Gates: tsc clean, 866/866, lint 0, build ok. Live-verified: pills/dictate
computed styles byte-identical to the reference chrome (bg .85/.5 alpha +
blur(8px) + same shadow stack); title requests 900 in both serif states.

components/dictation.tsx

@@ -459,7 +459,9 @@ export function DictationBar({ dictation }: { dictation: Dictation }) {
 				title={error ?? "Dictate into the composer"}
 				aria-label={error ? `Dictation failed: ${error}` : "Start dictation"}
 				data-testid="dictation-toggle"
-				className="flex h-7 w-full items-center justify-center gap-1.5 rounded-md border border-border/50 text-xs text-muted-foreground/70 transition-colors hover:border-border hover:text-muted-foreground"
+				// Same blurring as the floating chrome (owner, fix wave round 3),
+			// but lower opacity — the mic stays quieter than the model pills.
+			className="flex h-7 w-full items-center justify-center gap-1.5 rounded-md border border-border/50 bg-card/50 text-xs text-muted-foreground/70 shadow-lg backdrop-blur transition-colors hover:border-border hover:text-muted-foreground"
 			>
 				<MicIcon className="size-3.5" />
 				<span className="max-w-full truncate">{error ?? "Dictate"}</span>