themable prompt and some proposed themes

profile.d/themes/plasma.theme

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+# Plasma prompt theme — vivid KDE Plasma purples and electric cyan
+# ------------------------------------------------------------------------------
+# Theme files are NOT executed as shell scripts. load_theme() parses them
+# line by line. Only the following value forms are accepted:
+#
+#   KEY="$ColorVarName"    — reference to a colour variable from disp.sh
+#   KEY="${ColorVarName}"  — same with braces
+#   KEY="\e[...m"          — raw ANSI escape sequence (single block)
+#
+# Accepted keys:
+#   PROMPT_COLOR_*         — prompt slot colours (see profile.conf [prompt])
+#   Standard colour vars   — Black, Blue, On_IBlack, … (overrides the palette
+#                            from disp.sh for the whole shell session)
+#
+# Any unknown key, unsafe value, or shell construct will be ignored with a
+# warning — theme files cannot execute code.
+# ------------------------------------------------------------------------------
+# Captures the charged, vivid energy of KDE Plasma: dominant bright magenta/
+# purple, electric cyan highlights, all on a dark background. Palette overrides
+# boost Blue, Purple, and Cyan to their high-intensity equivalents so that
+# shell colour output reflects the same vivid palette.
+# ------------------------------------------------------------------------------
+
+# Palette overrides — vivid charged hues
+Blue="\e[0;94m"         # electric blue  (IBlue)
+Purple="\e[0;95m"       # vivid magenta  (IPurple — Plasma's signature colour)
+Cyan="\e[0;96m"         # electric cyan  (ICyan)
+
+PROMPT_COLOR_TIME_FG="$IPurple"      # vivid purple clock text
+PROMPT_COLOR_TIME_BG="$On_IBlack"    # dark grey background
+PROMPT_COLOR_BAR_BG="$On_Purple"     # bright magenta bar
+
+PROMPT_COLOR_OK_FG="$ICyan"          # electric cyan on success
+PROMPT_COLOR_OK_MARK="$IGreen"       # green checkmark
+
+PROMPT_COLOR_ERR_BG="$On_Red"        # red bar on failure
+PROMPT_COLOR_ERR_FG="$IWhite"        # bright white text
+PROMPT_COLOR_ERR_MARK="$IYellow"     # yellow X
+
+PROMPT_COLOR_ROOT_FG="$IRed"         # red for root
+PROMPT_COLOR_USER_FG="$BIPurple"     # bold vivid purple for user
+PROMPT_COLOR_DIR_FG="$ICyan"         # electric cyan path