fix(quality-house): give HOW labels and perception title room to breathe

Raise the header zone (qfdHdrH 3.2 → 4.2) so rotated HOW labels stop
crossing into the roof diamond grid, and wrap the perception title onto
two lines via text width so it stays inside its zone instead of bleeding
left over the H14/H15 column labels.

docs/quality-house.md

@@ -131,7 +131,8 @@ market"), not as a fair head-to-head buyer's guide.
       \pgfmathsetmacro{\tx}{\qfdNH + (\tk+0.5)*\qfdCmpW/6}
       \node[anchor=south, font=\scriptsize] at (\tx, 0.02) {\tk};
     }%
-    \node[anchor=south, font=\scriptsize\bfseries, align=center]
+    \node[anchor=south, font=\scriptsize\bfseries, align=center,
+          text width=\qfdCmpW cm]
          at ({\qfdNH + \qfdCmpW/2}, 0.7) {\qfdPerceptionTitle};
     \node[anchor=north, font=\scriptsize\itshape]
          at ({\qfdNH + 0.45}, -\qfdNW) {\qfdPoorLabel};
@@ -245,14 +246,14 @@ market"), not as a fair head-to-head buyer's guide.
 \def\qfdNH{15}
 \def\qfdWhatW{4.6}
 \def\qfdImpW{0.7}
-\def\qfdHdrH{3.2}
+\def\qfdHdrH{4.2}
 \def\qfdBasementN{3}
 \def\qfdCmpW{3.4}
 \qfdshowlegendfalse                 % we draw a 4-alternative legend manually
 
 \def\qfdWhatsTitle{User-facing requirements (W)}
 \def\qfdImpTitle{Weight}
-\def\qfdPerceptionTitle{Competitive perception (0–5, guessed)}
+\def\qfdPerceptionTitle{Competitive perception\\(0–5, guessed)}
 \def\qfdPoorLabel{poor}
 \def\qfdExcellentLabel{excellent}