feat: violet-chaton v2 — palette originale, kitty, AGS, Maple Mono NF

Refonte complete du rice. Palette 100% originale (Mitsuri Kanroji inspired),
zero emprunt Dracula/Catppuccin. 50 fichiers, 3200+ lignes.

Palette v2:
- palette.sh source de verite unique (dark + light)
- 5 accents (magenta, lilac, mitsuri, lavande, champagne)
- 4 semantiques derivees, 4 niveaux texte, 6 fonds
- Gradient signature: magenta → lilac → lavande → mitsuri
- Variante Light: fonds lavande, accents assombris WCAG

Terminal:
- kitty (remplace COSMIC Term comme principal)
- Maple Mono NF (cursive italics, ligatures)
- Cursor trail magenta, splits/layouts tiling, undercurl
- Vi-mode zsh avec cursor shape adaptatif

Shell:
- starship 3 lignes (palette nommee, brain_name, battery, sudo)
- zshrc v2 (nouveaux outils, fzf pimp, shell functions, vi-mode)
- Commandes custom: proj, glog, fkill, colors, hotkeys, weather, y

Desktop:
- AGS config (bar 3-pills, OSD gradient, launcher, notifications)
- COSMIC Dark + Light v2 (7 fichiers RON chacun)
- COSMIC Term v2 (color schemes dark/light, Maple Mono NF)
- GTK3/GTK4 dark + light css
- Vivaldi theme v2

Outils:
- +kitty +dust +procs +tokei +sd +hyperfine +gping +Maple Mono NF
- Propagation palette sur: bat, btop, cava, yazi, lazygit, rofi,
  delta, fastfetch, atuin, ls-colors, vivaldi
- Claude Code statusline brain-aware

Docs:
- README v2 complet (palette, structure, raccourcis, commandes)
- help.md v2 (reference exhaustive)

INSTALL/configs/ags/widgets/OSD.js

@@ -0,0 +1,95 @@
+// ── violet-chaton v2 — OSD widget ───────────────────────────────────────────
+// Overlay volume / brightness avec gradient Mitsuri
+
+const audio = await Service.import("audio");
+
+// ── OSD reveal timer ────────────────────────────────────────────────────────
+
+let osdTimeout = null;
+
+const showOSD = (window) => {
+    window.visible = true;
+    if (osdTimeout) clearTimeout(osdTimeout);
+    osdTimeout = setTimeout(() => {
+        window.visible = false;
+    }, 1500);
+};
+
+// ── Volume OSD ──────────────────────────────────────────────────────────────
+
+const VolumeOSD = () => {
+    const icon = Widget.Label({ className: "icon" });
+    const progress = Widget.ProgressBar();
+    const label = Widget.Label({ className: "label" });
+
+    const box = Widget.Box({
+        className: "osd",
+        children: [icon, progress, label],
+        connections: [[audio, (self) => {
+            const vol = audio.speaker?.volume || 0;
+            const muted = audio.speaker?.isMuted;
+            icon.label = muted ? "󰝟" : vol > 0.66 ? "󰕾" : vol > 0.33 ? "󰖀" : "󰕿";
+            progress.value = vol;
+            label.label = `${Math.round(vol * 100)}%`;
+        }, "speaker-changed"]],
+    });
+
+    return box;
+};
+
+// ── Brightness OSD ──────────────────────────────────────────────────────────
+
+const BrightnessOSD = () => {
+    const icon = Widget.Label({ className: "icon", label: "󰃞" });
+    const progress = Widget.ProgressBar();
+    const label = Widget.Label({ className: "label" });
+
+    const getBrightness = () => {
+        try {
+            const max = Number(Utils.exec("brightnessctl max"));
+            const cur = Number(Utils.exec("brightnessctl get"));
+            return max > 0 ? cur / max : 0;
+        } catch {
+            return 0;
+        }
+    };
+
+    const box = Widget.Box({
+        className: "osd",
+        children: [icon, progress, label],
+        connections: [[500, (self) => {
+            const val = getBrightness();
+            progress.value = val;
+            label.label = `${Math.round(val * 100)}%`;
+        }]],
+    });
+
+    return box;
+};
+
+// ── OSD windows ─────────────────────────────────────────────────────────────
+
+export const OSD = (monitor) => {
+    const volumeWin = Widget.Window({
+        name: `osd-volume-${monitor}`,
+        monitor,
+        anchor: ["bottom"],
+        layer: "overlay",
+        visible: false,
+        child: VolumeOSD(),
+    });
+
+    const brightnessWin = Widget.Window({
+        name: `osd-brightness-${monitor}`,
+        monitor,
+        anchor: ["bottom"],
+        layer: "overlay",
+        visible: false,
+        child: BrightnessOSD(),
+    });
+
+    // Auto-show on volume change
+    Utils.merge([audio.speaker?.bind("volume")], () => showOSD(volumeWin));
+
+    return [volumeWin, brightnessWin];
+};