feat: Enterprise UI redesign + Repo Explorer panel

- Add HF Explorer: browse all datasets/models/spaces from chahuadev profile
- Lazy-load commits per repo (split-pane layout)
- Enterprise palette: slate-900/800 colors, BORDER/MUTED/TEXT tokens
- Stats cards: Total / Windows / Linux file counts
- Skeleton loader with animation (replaces static loading text)
- Changelog nav tab: commits from HF API
- Fix Linux open-folder (xdg-open)
- Fix apt install python3-tk in build-desktop.bat WSL build
- Update npm package README: add Downloads/ChahuadevHub note

build-desktop.bat

@@ -90,7 +90,7 @@ if errorlevel 1 goto menu
 REM แปลง path Windows → WSL
 for /f "delims=" %%p in ('wsl wslpath -u "%PROJECT_DIR%"') do set WSL_DIR=%%p
 
-wsl bash -c "cd '%WSL_DIR%' && python3 -m pip install pyinstaller requests customtkinter -q && python3 -m PyInstaller --noconsole --onefile %SCRIPT%"
+wsl bash -c "cd '%WSL_DIR%' && sudo apt-get install -y python3-tk python3-dev -q && python3 -m pip install pyinstaller requests customtkinter -q && python3 -m PyInstaller --onefile %SCRIPT%"
 
 if %errorlevel% neq 0 (
     echo.
@@ -130,7 +130,7 @@ if errorlevel 1 (
     echo [SKIP] ข้ามขั้นตอน Linux เนื่องจากไม่พบ WSL
 ) else (
     for /f "delims=" %%p in ('wsl wslpath -u "%PROJECT_DIR%"') do set WSL_DIR=%%p
-    wsl bash -c "cd '%WSL_DIR%' && python3 -m pip install pyinstaller requests customtkinter -q && python3 -m PyInstaller --noconsole --onefile %SCRIPT%"
+    wsl bash -c "cd '%WSL_DIR%' && sudo apt-get install -y python3-tk python3-dev -q && python3 -m pip install pyinstaller requests customtkinter -q && python3 -m PyInstaller --onefile %SCRIPT%"
     if !errorlevel! neq 0 (
         echo [ERROR] Build Linux ล้มเหลว!
     ) else (

chahuadev_hub.py

@@ -2,21 +2,33 @@ import customtkinter as ctk
 import threading
 import urllib.parse
 import requests
-import json
 import os
-import time
+import webbrowser
 
 # ── CONFIG ──────────────────────────────────────────────────────────────────
-HF_REPO     = "chahuadev/chahuadev-framework-binaries"
-HF_API_URL  = f"https://huggingface.co/api/datasets/{HF_REPO}/tree/main"
-HF_CDN_BASE = f"https://huggingface.co/datasets/{HF_REPO}/resolve/main"
-DOWNLOAD_DIR = os.path.join(os.path.expanduser("~"), "Downloads", "ChahuadevHub")
+HF_AUTHOR      = "chahuadev"
+HF_REPO        = "chahuadev/chahuadev-framework-binaries"
+HF_API_URL     = f"https://huggingface.co/api/datasets/{HF_REPO}/tree/main"
+HF_COMMITS_URL = f"https://huggingface.co/api/datasets/{HF_REPO}/commits/main"
+HF_CDN_BASE    = f"https://huggingface.co/datasets/{HF_REPO}/resolve/main"
+DOWNLOAD_DIR   = os.path.join(os.path.expanduser("~"), "Downloads", "ChahuadevHub")
+
+# ── HF Explorer API ──────────────────────────────────────────────────────────
+HF_DATASETS_API = f"https://huggingface.co/api/datasets?author={HF_AUTHOR}&full=true"
+HF_MODELS_API   = f"https://huggingface.co/api/models?author={HF_AUTHOR}&full=true"
+HF_SPACES_API   = f"https://huggingface.co/api/spaces?author={HF_AUTHOR}&full=true"
+
+REPO_TYPE_META = {
+    "dataset": {"icon": "🗄️",  "color": "#8b5cf6", "label": "Dataset"},
+    "model":   {"icon": "🤖",  "color": "#3b82f6", "label": "Model"},
+    "space":   {"icon": "🚀",  "color": "#10b981", "label": "Space"},
+}
 
 # ── SKIP non-app files ───────────────────────────────────────────────────────
 SKIP_FILES = {".gitattributes", "README.md", "chahuadev-framework-binaries.png",
               "emoji-cleaner-app.png"}
 
-# ── APP METADATA (name, icon, description) derived from filename ─────────────
+# ── APP METADATA ─────────────────────────────────────────────────────────────
 APP_META = {
     "Chahuadev Framework": {
         "icon": "⚙️",
@@ -32,6 +44,27 @@ APP_META = {
     },
 }
 
+# ── ENTERPRISE PALETTE ────────────────────────────────────────────────────────
+ctk.set_appearance_mode("dark")
+ctk.set_default_color_theme("blue")
+
+BG_BASE     = "#09090f"
+SIDEBAR_BG  = "#0f172a"   # slate-900
+SURFACE     = "#1e293b"   # slate-800
+CARD_BG     = "#1e293b"
+HEADER_BG   = "#0f172a"
+BORDER      = "#334155"   # slate-700
+MUTED       = "#64748b"   # slate-500
+TEXT        = "#f1f5f9"   # slate-100
+TEXT_DIM    = "#94a3b8"   # slate-400
+ACCENT      = "#3b82f6"   # blue-500
+ACCENT_DARK = "#1d4ed8"   # blue-700
+SUCCESS     = "#10b981"
+DANGER      = "#ef4444"
+WIN_COLOR   = "#3b82f6"
+LINUX_COLOR = "#f59e0b"   # amber-500
+
+
 def format_size(n):
     for unit in ("B", "KB", "MB", "GB"):
         if n < 1024:
@@ -39,31 +72,177 @@ def format_size(n):
         n /= 1024
     return f"{n:.1f} TB"
 
+
 def guess_app_name(path):
     name = path.replace("-win-ia32.exe", "").replace("-win-x64.exe", "")
     name = name.replace("-1.0.0.AppImage", "").replace(".AppImage", "").replace(".exe", "")
     name = name.replace("-", " ").strip()
     return name
 
+
 def guess_platform(path):
     p = path.lower()
     if "ia32" in p:
-        return "Windows  32-bit", "#3b82f6"
+        return "Windows  32-bit", WIN_COLOR
     if "x64" in p or ".exe" in p:
-        return "Windows  64-bit", "#6366f1"
+        return "Windows  64-bit", WIN_COLOR
     if ".appimage" in p:
-        return "Linux  AppImage", "#f59e0b"
-    return "Unknown", "#6b7280"
+        return "Linux  AppImage", LINUX_COLOR
+    return "Unknown", MUTED
 
-# ── THEME ────────────────────────────────────────────────────────────────────
-ctk.set_appearance_mode("dark")
-ctk.set_default_color_theme("blue")
 
-CARD_BG     = "#1a1a2e"
-ACCENT      = "#0d6efd"
-SUCCESS     = "#10b981"
-SIDEBAR_BG  = "#0f0f1a"
-HEADER_BG   = "#12122a"
+# ════════════════════════════════════════════════════════════════════════════
+class StatCard(ctk.CTkFrame):
+    """Summary stat card shown at top of dashboard."""
+
+    def __init__(self, master, label: str, value: str, accent: str, icon: str):
+        super().__init__(master, fg_color=SURFACE, corner_radius=10,
+                         border_width=1, border_color=BORDER)
+        self.columnconfigure(0, weight=1)
+        ctk.CTkLabel(self, text=icon, font=ctk.CTkFont(size=20)).grid(
+            row=0, column=0, padx=16, pady=(14, 2), sticky="w"
+        )
+        self._val_lbl = ctk.CTkLabel(
+            self, text=value,
+            font=ctk.CTkFont(size=28, weight="bold"),
+            text_color=accent, anchor="w"
+        )
+        self._val_lbl.grid(row=1, column=0, padx=16, pady=0, sticky="w")
+        ctk.CTkLabel(
+            self, text=label, font=ctk.CTkFont(size=11),
+            text_color=TEXT_DIM, anchor="w"
+        ).grid(row=2, column=0, padx=16, pady=(0, 14), sticky="w")
+
+    def update_value(self, value: str):
+        self._val_lbl.configure(text=value)
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class SkeletonCard(ctk.CTkFrame):
+    """Animated placeholder shown while file list is loading."""
+
+    def __init__(self, master):
+        super().__init__(master, fg_color=CARD_BG, corner_radius=10,
+                         border_width=1, border_color=BORDER, height=80)
+        self.grid_propagate(False)
+        self.columnconfigure(1, weight=1)
+        self._step   = 0
+        self._colors = [BORDER, SURFACE, BORDER]
+
+        self._icon = ctk.CTkFrame(self, width=36, height=36, corner_radius=18,
+                                   fg_color=BORDER)
+        self._icon.grid(row=0, column=0, rowspan=2, padx=16, pady=16)
+        self._icon.grid_propagate(False)
+
+        self._title = ctk.CTkFrame(self, height=14, corner_radius=4, fg_color=BORDER)
+        self._title.grid(row=0, column=1, padx=6, pady=(18, 4), sticky="ew")
+        self._title.grid_propagate(False)
+
+        self._sub = ctk.CTkFrame(self, height=10, corner_radius=4, fg_color=SURFACE)
+        self._sub.grid(row=1, column=1, padx=6, pady=(0, 18), sticky="ew")
+        self._sub.grid_propagate(False)
+
+        self.columnconfigure(2, weight=0, minsize=140)
+        self._btn_ph = ctk.CTkFrame(self, width=120, height=34, corner_radius=6,
+                                     fg_color=BORDER)
+        self._btn_ph.grid(row=0, column=3, rowspan=2, padx=16, pady=16)
+        self._btn_ph.grid_propagate(False)
+
+        self._animate()
+
+    def _animate(self):
+        if not self.winfo_exists():
+            return
+        self._step = (self._step + 1) % len(self._colors)
+        self._title.configure(fg_color=self._colors[self._step])
+        self._sub.configure(fg_color=self._colors[(self._step + 1) % len(self._colors)])
+        self.after(500, self._animate)
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class ChangelogEntry(ctk.CTkFrame):
+    """One commit entry in the Changelog panel."""
+
+    def __init__(self, master, commit: dict):
+        super().__init__(master, fg_color=SURFACE, corner_radius=8,
+                         border_width=1, border_color=BORDER)
+        self.columnconfigure(0, weight=1)
+
+        title  = commit.get("title") or commit.get("message", "—")
+        sha    = (commit.get("id") or "")[:7]
+        date   = (commit.get("date") or "")[:10]
+        author = commit.get("authors") or [{}]
+        author_name = author[0].get("name", "—") if author else "—"
+
+        ctk.CTkLabel(self, text=title,
+                     font=ctk.CTkFont(size=13, weight="bold"),
+                     text_color=TEXT, anchor="w", wraplength=560).grid(
+            row=0, column=0, padx=14, pady=(12, 2), sticky="w"
+        )
+        ctk.CTkLabel(self, text=f"#{sha}  ·  {author_name}  ·  {date}",
+                     font=ctk.CTkFont(size=10),
+                     text_color=TEXT_DIM, anchor="w").grid(
+            row=1, column=0, padx=14, pady=(0, 12), sticky="w"
+        )
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class RepoCard(ctk.CTkFrame):
+    """Clickable repo card in Explorer panel."""
+
+    def __init__(self, master, repo: dict, repo_type: str, on_select):
+        meta = REPO_TYPE_META.get(repo_type, {"icon": "📦", "color": ACCENT, "label": repo_type})
+        self._repo      = repo
+        self._repo_type = repo_type
+        self._on_select = on_select
+        super().__init__(master, fg_color=SURFACE, corner_radius=8,
+                         border_width=1, border_color=BORDER, cursor="hand2")
+        self.columnconfigure(1, weight=1)
+
+        ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=18)).grid(
+            row=0, column=0, rowspan=2, padx=(12, 6), pady=10
+        )
+
+        repo_id  = repo.get("id") or repo.get("modelId", "")
+        short_id = repo_id.split("/")[-1] if "/" in repo_id else repo_id
+        last_mod = (repo.get("lastModified") or repo.get("updatedAt") or "")[:10]
+        downloads = repo.get("downloads") or repo.get("downloadsAllTime") or ""
+        private  = "🔒" if repo.get("private") else ""
+
+        self._name_lbl = ctk.CTkLabel(
+            self, text=short_id,
+            font=ctk.CTkFont(size=12, weight="bold"),
+            text_color=TEXT, anchor="w"
+        )
+        self._name_lbl.grid(row=0, column=1, padx=4, pady=(10, 1), sticky="w")
+
+        info_parts = [meta["label"]]
+        if downloads:
+            info_parts.append(f"↓{downloads}")
+        if last_mod:
+            info_parts.append(last_mod)
+        if private:
+            info_parts.append(private)
+        ctk.CTkLabel(
+            self, text="  ·  ".join(info_parts),
+            font=ctk.CTkFont(size=10), text_color=TEXT_DIM, anchor="w"
+        ).grid(row=1, column=1, padx=4, pady=(0, 10), sticky="w")
+
+        ctk.CTkLabel(
+            self, text=meta["label"],
+            fg_color=meta["color"], corner_radius=4,
+            font=ctk.CTkFont(size=9, weight="bold"), padx=6, pady=1,
+            text_color="white"
+        ).grid(row=0, column=2, padx=8, pady=(10, 0), sticky="e")
+
+        for w in (self, self._name_lbl):
+            w.bind("<Button-1>", lambda e: self._on_select(self._repo, self._repo_type))
+
+    def set_active(self, active: bool):
+        self.configure(
+            fg_color="#1e3a5f" if active else SURFACE,
+            border_color=ACCENT if active else BORDER
+        )
 
 
 # ════════════════════════════════════════════════════════════════════════════
@@ -71,61 +250,68 @@ class AppCard(ctk.CTkFrame):
     """Single file download card."""
 
     def __init__(self, master, file_info: dict, download_dir: str, status_cb):
-        super().__init__(master, fg_color=CARD_BG, corner_radius=10)
+        super().__init__(master, fg_color=CARD_BG, corner_radius=10,
+                         border_width=1, border_color=BORDER)
 
         self.file_info    = file_info
         self.download_dir = download_dir
         self.status_cb    = status_cb
         self._thread      = None
 
-        path   = file_info["path"]
-        size   = file_info.get("size", 0)
+        path     = file_info["path"]
+        size     = file_info.get("size", 0)
         app_name = guess_app_name(path)
-        meta   = APP_META.get(app_name, {"icon": "📦", "desc": path})
+        meta     = APP_META.get(app_name, {"icon": "📦", "desc": path})
         plat, plat_color = guess_platform(path)
 
         self.columnconfigure(1, weight=1)
 
         # Icon
-        icon_lbl = ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=32))
-        icon_lbl.grid(row=0, column=0, rowspan=2, padx=(16, 10), pady=16)
+        ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=32)).grid(
+            row=0, column=0, rowspan=2, padx=(16, 10), pady=16
+        )
 
         # App name
-        name_lbl = ctk.CTkLabel(self, text=app_name,
-                                 font=ctk.CTkFont(size=15, weight="bold"),
-                                 anchor="w")
-        name_lbl.grid(row=0, column=1, sticky="sw", padx=4, pady=(14, 0))
+        ctk.CTkLabel(self, text=app_name,
+                     font=ctk.CTkFont(size=15, weight="bold"),
+                     text_color=TEXT, anchor="w").grid(
+            row=0, column=1, sticky="sw", padx=4, pady=(14, 0)
+        )
 
         # Description + size
-        desc_lbl = ctk.CTkLabel(self,
-                                 text=f"{meta['desc']}   •   {format_size(size)}",
-                                 font=ctk.CTkFont(size=11),
-                                 text_color="#9ca3af", anchor="w")
-        desc_lbl.grid(row=1, column=1, sticky="nw", padx=4, pady=(0, 14))
+        ctk.CTkLabel(self, text=f"{meta['desc']}   •   {format_size(size)}",
+                     font=ctk.CTkFont(size=11),
+                     text_color=TEXT_DIM, anchor="w").grid(
+            row=1, column=1, sticky="nw", padx=4, pady=(0, 14)
+        )
 
         # Platform badge
-        badge = ctk.CTkLabel(self, text=plat, fg_color=plat_color,
-                              corner_radius=6, font=ctk.CTkFont(size=10, weight="bold"),
-                              padx=8, pady=2)
-        badge.grid(row=0, column=2, padx=8, pady=(14, 0), sticky="e")
+        ctk.CTkLabel(self, text=plat, fg_color=plat_color,
+                     corner_radius=6, font=ctk.CTkFont(size=10, weight="bold"),
+                     padx=8, pady=2).grid(
+            row=0, column=2, padx=8, pady=(14, 0), sticky="e"
+        )
 
         # Filename label (small)
-        fn_lbl = ctk.CTkLabel(self, text=path, font=ctk.CTkFont(size=10),
-                               text_color="#6b7280", anchor="e")
-        fn_lbl.grid(row=1, column=2, padx=8, pady=(0, 14), sticky="e")
+        ctk.CTkLabel(self, text=path, font=ctk.CTkFont(size=10),
+                     text_color=MUTED, anchor="e").grid(
+            row=1, column=2, padx=8, pady=(0, 14), sticky="e"
+        )
 
         # Download button
         self.btn = ctk.CTkButton(self, text="⬇  Download", width=130,
+                                  fg_color=ACCENT, hover_color=ACCENT_DARK,
                                   command=self._start_download)
         self.btn.grid(row=0, column=3, rowspan=2, padx=16, pady=16)
 
         # Progress bar (hidden initially)
-        self.pbar = ctk.CTkProgressBar(self, width=130)
+        self.pbar = ctk.CTkProgressBar(self, width=130,
+                                        progress_color=ACCENT, fg_color=BORDER)
         self.pbar.set(0)
 
         # Percent label
         self.pct_lbl = ctk.CTkLabel(self, text="", font=ctk.CTkFont(size=10),
-                                     text_color="#9ca3af")
+                                     text_color=TEXT_DIM)
 
     # ── download logic ────────────────────────────────────────────────────────
     def _start_download(self):
@@ -143,7 +329,7 @@ class AppCard(ctk.CTkFrame):
         total      = self.file_info.get("size", 0)
         url        = f"{HF_CDN_BASE}/{urllib.parse.quote(path)}"
         dest       = os.path.join(self.download_dir, path)
-        chunk_size = 65536  # 64 KB
+        chunk_size = 65536
 
         try:
             self.btn.configure(text="Connecting…")
@@ -163,23 +349,20 @@ class AppCard(ctk.CTkFrame):
                                     text=f"{format_size(downloaded)} / {format_size(total)}  ({pct*100:.0f}%)"
                                 )
 
-            # ── Verify size ───────────────────────────────────────────────────
             if total > 0 and downloaded != total:
                 raise IOError(
                     f"Incomplete download: got {format_size(downloaded)}, expected {format_size(total)}"
                 )
 
-            # ── Done ─────────────────────────────────────────────────────────
             self.btn.configure(text="✓  Done", fg_color=SUCCESS, state="normal")
             self.pbar.set(1)
             self.pct_lbl.configure(text=f"Saved → {dest}")
             self.status_cb(f"✓ Downloaded: {path}")
 
         except Exception as exc:
-            self.btn.configure(text="⚠  Retry", state="normal", fg_color="#ef4444")
+            self.btn.configure(text="⚠  Retry", state="normal", fg_color=DANGER)
             self.pct_lbl.configure(text=f"Error: {exc}")
             self.status_cb(f"✗ Failed: {path} — {exc}")
-            # Remove incomplete file if it exists
             if os.path.exists(dest):
                 try:
                     os.remove(dest)
@@ -193,10 +376,14 @@ class ChahuadevHub(ctk.CTk):
     def __init__(self):
         super().__init__()
         self.title("Chahuadev Hub")
-        self.geometry("1020x680")
-        self.minsize(860, 560)
-        self._filter = "All"
-        self._cards  = []
+        self.geometry("1080x720")
+        self.minsize(900, 580)
+        self.configure(fg_color=BG_BASE)
+        self._filter    = "All"
+        self._cards     = []
+        self._all_files = []
+        self._skeletons = []
+        self._nav       = "downloads"
 
         self._build_layout()
         threading.Thread(target=self._fetch_files, daemon=True).start()
@@ -208,104 +395,237 @@ class ChahuadevHub(ctk.CTk):
         self.grid_columnconfigure(1, weight=1)
 
         # ── Sidebar ──────────────────────────────────────────────────────────
-        self.sidebar = ctk.CTkFrame(self, width=210, corner_radius=0,
+        self.sidebar = ctk.CTkFrame(self, width=220, corner_radius=0,
                                      fg_color=SIDEBAR_BG)
         self.sidebar.grid(row=0, column=0, rowspan=2, sticky="nsew")
         self.sidebar.grid_propagate(False)
-        self.sidebar.grid_rowconfigure(10, weight=1)
+        self.sidebar.grid_rowconfigure(20, weight=1)
 
-        logo = ctk.CTkLabel(self.sidebar, text="CHAHUADEV\nHUB",
-                             font=ctk.CTkFont(size=22, weight="bold"),
-                             text_color="#7c3aed")
-        logo.grid(row=0, column=0, padx=20, pady=(24, 8))
+        ctk.CTkLabel(self.sidebar, text="CHAHUADEV\nHUB",
+                     font=ctk.CTkFont(size=22, weight="bold"),
+                     text_color="#7c3aed").grid(
+            row=0, column=0, padx=20, pady=(28, 4)
+        )
+        ctk.CTkLabel(self.sidebar, text="Official App Distribution",
+                     font=ctk.CTkFont(size=10), text_color=MUTED).grid(
+            row=1, column=0, padx=20, pady=(0, 24)
+        )
 
-        sub = ctk.CTkLabel(self.sidebar, text="Official App Distribution",
-                            font=ctk.CTkFont(size=10), text_color="#6b7280")
-        sub.grid(row=1, column=0, padx=20, pady=(0, 24))
+        # ─ Navigation ─
+        ctk.CTkLabel(self.sidebar, text="NAVIGATE",
+                     font=ctk.CTkFont(size=10, weight="bold"),
+                     text_color=MUTED).grid(row=2, column=0, padx=20, sticky="w")
 
+        self._nav_btns = {}
+        for i, (label, key) in enumerate([
+            ("  ⬇  Downloads", "downloads"),
+            ("  �  Explorer",  "explorer"),
+            ("  �📋  Changelog", "changelog"),
+        ], start=3):
+            btn = ctk.CTkButton(
+                self.sidebar, text=label, anchor="w",
+                fg_color=ACCENT if key == "downloads" else "transparent",
+                hover_color=ACCENT_DARK,
+                command=lambda k=key: self._switch_nav(k)
+            )
+            btn.grid(row=i, column=0, padx=12, pady=3, sticky="ew")
+            self._nav_btns[key] = btn
+
+        # ─ Filter ─
         ctk.CTkLabel(self.sidebar, text="FILTER BY PLATFORM",
                      font=ctk.CTkFont(size=10, weight="bold"),
-                     text_color="#4b5563").grid(row=2, column=0, padx=20, sticky="w")
+                     text_color=MUTED).grid(row=6, column=0, padx=20, pady=(20, 4), sticky="w")
 
         self._filter_btns = {}
         for i, (label, key) in enumerate([
             ("  All Files", "All"),
-            ("  Windows", "Windows"),
-            ("  Linux", "Linux"),
-        ], start=3):
+            ("  🪟  Windows", "Windows"),
+            ("  🐧  Linux", "Linux"),
+        ], start=7):
             btn = ctk.CTkButton(
                 self.sidebar, text=label, anchor="w",
                 fg_color=ACCENT if key == "All" else "transparent",
-                hover_color="#1d4ed8",
-                command=lambda k=key: self._set_filter(k),
+                hover_color=ACCENT_DARK,
+                command=lambda k=key: self._set_filter(k)
             )
-            btn.grid(row=i, column=0, padx=12, pady=4, sticky="ew")
+            btn.grid(row=i, column=0, padx=12, pady=3, sticky="ew")
             self._filter_btns[key] = btn
 
-        # Download folder button
+        # ─ Bottom actions ─
         ctk.CTkButton(
             self.sidebar, text="📂  Open Downloads",
-            fg_color="transparent", hover_color="#1f2937",
+            fg_color="transparent", hover_color=SURFACE,
             command=self._open_download_dir,
-        ).grid(row=10, column=0, padx=12, pady=(0, 8), sticky="ew")
+        ).grid(row=20, column=0, padx=12, pady=(0, 6), sticky="ew")
 
         ctk.CTkButton(
             self.sidebar, text="🔄  Refresh",
-            fg_color="transparent", hover_color="#1f2937",
+            fg_color="transparent", hover_color=SURFACE,
             command=self._refresh,
-        ).grid(row=11, column=0, padx=12, pady=(0, 24), sticky="ew")
+        ).grid(row=21, column=0, padx=12, pady=(0, 6), sticky="ew")
+
+        ctk.CTkButton(
+            self.sidebar, text="🔗  Hugging Face",
+            fg_color="transparent", hover_color=SURFACE,
+            command=lambda: webbrowser.open(f"https://huggingface.co/{HF_REPO}")
+        ).grid(row=22, column=0, padx=12, pady=(0, 20), sticky="ew")
 
         # ── Main area ────────────────────────────────────────────────────────
-        main = ctk.CTkFrame(self, fg_color=HEADER_BG, corner_radius=0)
-        main.grid(row=0, column=1, sticky="nsew")
-        main.grid_rowconfigure(1, weight=1)
-        main.grid_columnconfigure(0, weight=1)
+        self.main = ctk.CTkFrame(self, fg_color=HEADER_BG, corner_radius=0)
+        self.main.grid(row=0, column=1, sticky="nsew")
+        self.main.grid_rowconfigure(2, weight=1)
+        self.main.grid_columnconfigure(0, weight=1)
 
         # Header bar
-        hdr = ctk.CTkFrame(main, fg_color="#0a0a1a", corner_radius=0, height=64)
+        hdr = ctk.CTkFrame(self.main, fg_color=BG_BASE, corner_radius=0, height=64)
         hdr.grid(row=0, column=0, sticky="ew")
         hdr.grid_columnconfigure(0, weight=1)
         hdr.grid_propagate(False)
 
         self.hdr_title = ctk.CTkLabel(
             hdr, text="Available Downloads",
-            font=ctk.CTkFont(size=18, weight="bold"), anchor="w"
+            font=ctk.CTkFont(size=18, weight="bold"),
+            text_color=TEXT, anchor="w"
         )
         self.hdr_title.grid(row=0, column=0, padx=24, pady=18, sticky="w")
 
         self.hdr_count = ctk.CTkLabel(
-            hdr, text="Loading…", font=ctk.CTkFont(size=12),
-            text_color="#6b7280", anchor="e"
+            hdr, text="Fetching…",
+            font=ctk.CTkFont(size=12), text_color=MUTED, anchor="e"
         )
         self.hdr_count.grid(row=0, column=1, padx=24, pady=18, sticky="e")
 
-        # Scrollable card list
-        self.scroll = ctk.CTkScrollableFrame(main, fg_color=HEADER_BG, corner_radius=0)
-        self.scroll.grid(row=1, column=0, sticky="nsew", padx=0, pady=0)
-        self.scroll.grid_columnconfigure(0, weight=1)
+        # Stats cards row
+        stats_row = ctk.CTkFrame(self.main, fg_color=HEADER_BG, corner_radius=0, height=110)
+        stats_row.grid(row=1, column=0, sticky="ew", padx=20, pady=(10, 0))
+        stats_row.grid_columnconfigure((0, 1, 2), weight=1)
+        stats_row.grid_propagate(False)
+
+        self._stat_total = StatCard(stats_row, "Total Files",   "—", ACCENT,     "📦")
+        self._stat_win   = StatCard(stats_row, "Windows Files", "—", WIN_COLOR,  "🪟")
+        self._stat_linux = StatCard(stats_row, "Linux Files",   "—", LINUX_COLOR,"🐧")
+        self._stat_total.grid(row=0, column=0, padx=(0, 8), pady=0, sticky="nsew")
+        self._stat_win.grid  (row=0, column=1, padx=8,      pady=0, sticky="nsew")
+        self._stat_linux.grid(row=0, column=2, padx=(8, 0), pady=0, sticky="nsew")
+
+        # Content frame (holds downloads & changelog panels)
+        self.content_frame = ctk.CTkFrame(self.main, fg_color=HEADER_BG, corner_radius=0)
+        self.content_frame.grid(row=2, column=0, sticky="nsew", padx=0, pady=(12, 0))
+        self.content_frame.grid_rowconfigure(0, weight=1)
+        self.content_frame.grid_columnconfigure(0, weight=1)
+
+        # Downloads panel
+        self.downloads_panel = ctk.CTkScrollableFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.downloads_panel.grid(row=0, column=0, sticky="nsew")
+        self.downloads_panel.grid_columnconfigure(0, weight=1)
+
+        for i in range(4):
+            sk = SkeletonCard(self.downloads_panel)
+            sk.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
+            self._skeletons.append(sk)
+
+        # ── Explorer panel (hidden initially) ────────────────────────────────
+        self.explorer_panel = ctk.CTkFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.explorer_panel.grid(row=0, column=0, sticky="nsew")
+        self.explorer_panel.grid_rowconfigure(0, weight=1)
+        self.explorer_panel.grid_columnconfigure(0, weight=0, minsize=280)
+        self.explorer_panel.grid_columnconfigure(1, weight=1)
+        self.explorer_panel.grid_remove()
+
+        # Left: repo list
+        self._repo_list_frame = ctk.CTkScrollableFrame(
+            self.explorer_panel, fg_color=SURFACE, corner_radius=0, width=260
+        )
+        self._repo_list_frame.grid(row=0, column=0, sticky="nsew", padx=(0, 1))
+        self._repo_list_frame.grid_columnconfigure(0, weight=1)
+
+        self._repo_loading_lbl = ctk.CTkLabel(
+            self._repo_list_frame, text="⏳  Fetching repos…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        self._repo_loading_lbl.grid(row=0, column=0, pady=40)
 
-        # Loading spinner label (replaced by cards once loaded)
-        self.loading_lbl = ctk.CTkLabel(
-            self.scroll, text="⏳  Fetching file list from Hugging Face…",
-            font=ctk.CTkFont(size=14), text_color="#6b7280"
+        # Right: commit detail
+        self._commit_frame = ctk.CTkFrame(
+            self.explorer_panel, fg_color=HEADER_BG, corner_radius=0
         )
-        self.loading_lbl.grid(row=0, column=0, pady=60)
+        self._commit_frame.grid(row=0, column=1, sticky="nsew")
+        self._commit_frame.grid_rowconfigure(1, weight=1)
+        self._commit_frame.grid_columnconfigure(0, weight=1)
+
+        self._commit_hdr = ctk.CTkLabel(
+            self._commit_frame,
+            text="← Select a repo to view commits",
+            font=ctk.CTkFont(size=13), text_color=MUTED, anchor="w"
+        )
+        self._commit_hdr.grid(row=0, column=0, padx=20, pady=14, sticky="w")
 
-        # ── Status bar ───────────────────────────────────────────────────────
+        self._commit_scroll = ctk.CTkScrollableFrame(
+            self._commit_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self._commit_scroll.grid(row=1, column=0, sticky="nsew")
+        self._commit_scroll.grid_columnconfigure(0, weight=1)
+
+        self._repo_cards: list = []
+        self._active_repo_card = None
+
+        # Changelog panel (hidden initially)
+        self.changelog_panel = ctk.CTkScrollableFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.changelog_panel.grid(row=0, column=0, sticky="nsew")
+        self.changelog_panel.grid_columnconfigure(0, weight=1)
+        self.changelog_panel.grid_remove()
+
+        self._changelog_lbl = ctk.CTkLabel(
+            self.changelog_panel, text="⏳  Loading commit history…",
+            font=ctk.CTkFont(size=14), text_color=MUTED
+        )
+        self._changelog_lbl.grid(row=0, column=0, pady=60)
+
+        # Status bar
         self.statusbar = ctk.CTkLabel(
-            self, text=f"Download folder: {DOWNLOAD_DIR}",
-            font=ctk.CTkFont(size=10), text_color="#4b5563",
-            fg_color="#09090f", anchor="w", corner_radius=0
+            self, text=f"  Download folder: {DOWNLOAD_DIR}",
+            font=ctk.CTkFont(size=10), text_color=MUTED,
+            fg_color=BG_BASE, anchor="w", corner_radius=0
         )
-        self.statusbar.grid(row=1, column=1, sticky="ew", padx=12, pady=4)
+        self.statusbar.grid(row=1, column=1, sticky="ew", padx=0, pady=0)
 
-    # ── API fetch ─────────────────────────────────────────────────────────────
+    # ── Navigation ───────────────────────────────────────────────────────────
+    def _switch_nav(self, key: str):
+        self._nav = key
+        for k, btn in self._nav_btns.items():
+            btn.configure(fg_color=ACCENT if k == key else "transparent")
+
+        self.downloads_panel.grid_remove()
+        self.explorer_panel.grid_remove()
+        self.changelog_panel.grid_remove()
+
+        if key == "downloads":
+            self.hdr_title.configure(text="Available Downloads")
+            self.downloads_panel.grid()
+        elif key == "explorer":
+            self.hdr_title.configure(text="🔍  Repo Explorer — huggingface.co/chahuadev")
+            self.hdr_count.configure(text="")
+            self.explorer_panel.grid()
+            if not hasattr(self, "_explorer_loaded"):
+                threading.Thread(target=self._fetch_all_repos, daemon=True).start()
+        else:
+            self.hdr_title.configure(text="Changelog — Commit History")
+            self.changelog_panel.grid()
+            if not hasattr(self, "_changelog_loaded"):
+                threading.Thread(target=self._fetch_changelog, daemon=True).start()
+
+    # ── API fetch — files ─────────────────────────────────────────────────────
     def _fetch_files(self):
         try:
             resp  = requests.get(HF_API_URL, timeout=15)
             resp.raise_for_status()
             files = resp.json()
-            # Keep only "blob" type (actual files) and skip metadata files
             blobs = [f for f in files
                      if f.get("type") == "file" and f["path"] not in SKIP_FILES]
             self.after(0, self._populate_cards, blobs)
@@ -313,8 +633,11 @@ class ChahuadevHub(ctk.CTk):
             self.after(0, self._show_error, str(exc))
 
     def _populate_cards(self, files: list):
-        self.loading_lbl.destroy()
+        for sk in self._skeletons:
+            sk.destroy()
+        self._skeletons.clear()
         self._all_files = files
+        self._update_stats(files)
         self._render_cards(files)
 
     def _render_cards(self, files: list):
@@ -323,7 +646,7 @@ class ChahuadevHub(ctk.CTk):
         self._cards.clear()
 
         for i, f in enumerate(files):
-            card = AppCard(self.scroll, f, DOWNLOAD_DIR, self._set_status)
+            card = AppCard(self.downloads_panel, f, DOWNLOAD_DIR, self._set_status)
             card.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
             self._cards.append(card)
 
@@ -332,28 +655,157 @@ class ChahuadevHub(ctk.CTk):
         self._set_status(f"Loaded {count} files from huggingface.co/{HF_REPO}")
 
     def _show_error(self, msg: str):
-        self.loading_lbl.configure(
+        for sk in self._skeletons:
+            sk.destroy()
+        self._skeletons.clear()
+        ctk.CTkLabel(
+            self.downloads_panel,
             text=f"⚠  Failed to connect to Hugging Face\n{msg}",
-            text_color="#ef4444"
-        )
+            font=ctk.CTkFont(size=14), text_color=DANGER
+        ).grid(row=0, column=0, pady=60)
         self._set_status(f"✗ Error: {msg}")
 
+    def _update_stats(self, files: list):
+        total = len(files)
+        wins  = sum(1 for f in files if ".exe" in f["path"].lower())
+        lins  = sum(1 for f in files if ".appimage" in f["path"].lower())
+        self._stat_total.update_value(str(total))
+        self._stat_win.update_value(str(wins))
+        self._stat_linux.update_value(str(lins))
+
+    # ── API fetch — ALL repos (Explorer) ─────────────────────────────────────
+    def _fetch_all_repos(self):
+        results = []
+        for url, rtype in [
+            (HF_DATASETS_API, "dataset"),
+            (HF_MODELS_API,   "model"),
+            (HF_SPACES_API,   "space"),
+        ]:
+            try:
+                resp = requests.get(url, timeout=15)
+                resp.raise_for_status()
+                for r in resp.json():
+                    results.append((r, rtype))
+            except Exception:
+                pass
+        results.sort(
+            key=lambda x: x[0].get("lastModified") or x[0].get("updatedAt") or "",
+            reverse=True
+        )
+        self.after(0, self._populate_repos, results)
+
+    def _populate_repos(self, results: list):
+        self._explorer_loaded = True
+        if hasattr(self, "_repo_loading_lbl") and self._repo_loading_lbl.winfo_exists():
+            self._repo_loading_lbl.destroy()
+
+        total = len(results)
+        types: dict = {}
+        for _, t in results:
+            types[t] = types.get(t, 0) + 1
+        parts = [f"{total} repos"]
+        for t in ("dataset", "model", "space"):
+            if types.get(t):
+                m = REPO_TYPE_META[t]
+                parts.append(f"{m['icon']} {types[t]} {m['label']}s")
+        self.hdr_count.configure(text="  ·  ".join(parts))
+        self._set_status(f"Loaded {total} repos from huggingface.co/{HF_AUTHOR}")
+
+        for i, (repo, rtype) in enumerate(results):
+            card = RepoCard(self._repo_list_frame, repo, rtype, self._on_repo_select)
+            card.grid(row=i, column=0, padx=8, pady=4, sticky="ew")
+            self._repo_cards.append(card)
+
+    def _on_repo_select(self, repo: dict, repo_type: str):
+        repo_id = repo.get("id") or repo.get("modelId", "")
+        for card in self._repo_cards:
+            cid = card._repo.get("id") or card._repo.get("modelId", "")
+            card.set_active(cid == repo_id)
+
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        self._commit_hdr.configure(text=f"📋  Commits — {repo_id}", text_color=TEXT)
+
+        lbl = ctk.CTkLabel(
+            self._commit_scroll, text="⏳  Loading commits…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        lbl.grid(row=0, column=0, pady=40)
+        threading.Thread(
+            target=self._fetch_repo_commits,
+            args=(repo_id, repo_type),
+            daemon=True
+        ).start()
+
+    def _fetch_repo_commits(self, repo_id: str, repo_type: str):
+        url = f"https://huggingface.co/api/{repo_type}s/{repo_id}/commits/main"
+        try:
+            resp = requests.get(url, timeout=15)
+            resp.raise_for_status()
+            commits = resp.json()
+            self.after(0, self._show_repo_commits, commits, repo_id)
+        except Exception as exc:
+            self.after(0, self._show_repo_commits_error, str(exc))
+
+    def _show_repo_commits(self, commits: list, repo_id: str):
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        if not commits:
+            ctk.CTkLabel(
+                self._commit_scroll, text="No commits found",
+                font=ctk.CTkFont(size=13), text_color=MUTED
+            ).grid(row=0, column=0, pady=40)
+            return
+        for i, commit in enumerate(commits):
+            entry = ChangelogEntry(self._commit_scroll, commit)
+            entry.grid(row=i, column=0, padx=12, pady=5, sticky="ew")
+        self._commit_scroll.grid_columnconfigure(0, weight=1)
+        self._set_status(f"{len(commits)} commits — {repo_id}")
+
+    def _show_repo_commits_error(self, msg: str):
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        ctk.CTkLabel(
+            self._commit_scroll, text=f"⚠  {msg}",
+            font=ctk.CTkFont(size=13), text_color=DANGER
+        ).grid(row=0, column=0, pady=40)
+
+    # ── API fetch — changelog ─────────────────────────────────────────────────
+    def _fetch_changelog(self):
+        try:
+            resp = requests.get(HF_COMMITS_URL, timeout=15)
+            resp.raise_for_status()
+            commits = resp.json()
+            self.after(0, self._populate_changelog, commits)
+        except Exception as exc:
+            self.after(0, self._changelog_error, str(exc))
+
+    def _populate_changelog(self, commits: list):
+        self._changelog_loaded = True
+        self._changelog_lbl.destroy()
+        for i, commit in enumerate(commits):
+            entry = ChangelogEntry(self.changelog_panel, commit)
+            entry.grid(row=i, column=0, padx=20, pady=6, sticky="ew")
+        self._set_status(f"Loaded {len(commits)} commits from Hugging Face")
+
+    def _changelog_error(self, msg: str):
+        self._changelog_lbl.configure(
+            text=f"⚠  Failed to load changelog\n{msg}", text_color=DANGER
+        )
+
     # ── Filter ────────────────────────────────────────────────────────────────
     def _set_filter(self, key: str):
         self._filter = key
         for k, btn in self._filter_btns.items():
             btn.configure(fg_color=ACCENT if k == key else "transparent")
-
-        if not hasattr(self, "_all_files"):
+        if not self._all_files:
             return
-
         if key == "All":
             filtered = self._all_files
         elif key == "Windows":
             filtered = [f for f in self._all_files if ".exe" in f["path"].lower()]
-        else:  # Linux
+        else:
             filtered = [f for f in self._all_files if ".appimage" in f["path"].lower()]
-
         self._render_cards(filtered)
 
     # ── Helpers ───────────────────────────────────────────────────────────────
@@ -362,22 +814,56 @@ class ChahuadevHub(ctk.CTk):
 
     def _open_download_dir(self):
         os.makedirs(DOWNLOAD_DIR, exist_ok=True)
-        os.startfile(DOWNLOAD_DIR)          # Windows only; harmless on error
+        if os.name == "nt":
+            os.startfile(DOWNLOAD_DIR)
+        else:
+            import subprocess
+            subprocess.Popen(["xdg-open", DOWNLOAD_DIR])
 
     def _refresh(self):
-        self._cards_clear()
-        self.loading_lbl = ctk.CTkLabel(
-            self.scroll, text="⏳  Refreshing…",
-            font=ctk.CTkFont(size=14), text_color="#6b7280"
-        )
-        self.loading_lbl.grid(row=0, column=0, pady=60)
-        self.hdr_count.configure(text="Loading…")
-        threading.Thread(target=self._fetch_files, daemon=True).start()
-
-    def _cards_clear(self):
         for card in self._cards:
             card.destroy()
         self._cards.clear()
+        self._all_files = []
+        self._stat_total.update_value("—")
+        self._stat_win.update_value("—")
+        self._stat_linux.update_value("—")
+        self.hdr_count.configure(text="Fetching…")
+
+        for i in range(4):
+            sk = SkeletonCard(self.downloads_panel)
+            sk.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
+            self._skeletons.append(sk)
+
+        if hasattr(self, "_changelog_loaded"):
+            del self._changelog_loaded
+        for w in self.changelog_panel.winfo_children():
+            w.destroy()
+        self._changelog_lbl = ctk.CTkLabel(
+            self.changelog_panel, text="⏳  Loading commit history…",
+            font=ctk.CTkFont(size=14), text_color=MUTED
+        )
+        self._changelog_lbl.grid(row=0, column=0, pady=60)
+
+        # Reset explorer
+        if hasattr(self, "_explorer_loaded"):
+            del self._explorer_loaded
+        for card in self._repo_cards:
+            card.destroy()
+        self._repo_cards.clear()
+        self._active_repo_card = None
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        self._commit_hdr.configure(
+            text="← Select a repo to view commits", text_color=MUTED
+        )
+        self._repo_loading_lbl = ctk.CTkLabel(
+            self._repo_list_frame, text="⏳  Fetching repos…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        self._repo_loading_lbl.grid(row=0, column=0, pady=40)
+
+        threading.Thread(target=self._fetch_files, daemon=True).start()
 
 
 # ════════════════════════════════════════════════════════════════════════════

chahuadev_hub/main.py

@@ -2,21 +2,33 @@ import customtkinter as ctk
 import threading
 import urllib.parse
 import requests
-import json
 import os
-import time
+import webbrowser
 
 # ── CONFIG ──────────────────────────────────────────────────────────────────
-HF_REPO     = "chahuadev/chahuadev-framework-binaries"
-HF_API_URL  = f"https://huggingface.co/api/datasets/{HF_REPO}/tree/main"
-HF_CDN_BASE = f"https://huggingface.co/datasets/{HF_REPO}/resolve/main"
-DOWNLOAD_DIR = os.path.join(os.path.expanduser("~"), "Downloads", "ChahuadevHub")
+HF_AUTHOR      = "chahuadev"
+HF_REPO        = "chahuadev/chahuadev-framework-binaries"
+HF_API_URL     = f"https://huggingface.co/api/datasets/{HF_REPO}/tree/main"
+HF_COMMITS_URL = f"https://huggingface.co/api/datasets/{HF_REPO}/commits/main"
+HF_CDN_BASE    = f"https://huggingface.co/datasets/{HF_REPO}/resolve/main"
+DOWNLOAD_DIR   = os.path.join(os.path.expanduser("~"), "Downloads", "ChahuadevHub")
+
+# ── HF Explorer API ──────────────────────────────────────────────────────────
+HF_DATASETS_API = f"https://huggingface.co/api/datasets?author={HF_AUTHOR}&full=true"
+HF_MODELS_API   = f"https://huggingface.co/api/models?author={HF_AUTHOR}&full=true"
+HF_SPACES_API   = f"https://huggingface.co/api/spaces?author={HF_AUTHOR}&full=true"
+
+REPO_TYPE_META = {
+    "dataset": {"icon": "🗄️",  "color": "#8b5cf6", "label": "Dataset"},
+    "model":   {"icon": "🤖",  "color": "#3b82f6", "label": "Model"},
+    "space":   {"icon": "🚀",  "color": "#10b981", "label": "Space"},
+}
 
 # ── SKIP non-app files ───────────────────────────────────────────────────────
 SKIP_FILES = {".gitattributes", "README.md", "chahuadev-framework-binaries.png",
               "emoji-cleaner-app.png"}
 
-# ── APP METADATA (name, icon, description) derived from filename ─────────────
+# ── APP METADATA ─────────────────────────────────────────────────────────────
 APP_META = {
     "Chahuadev Framework": {
         "icon": "⚙️",
@@ -32,6 +44,27 @@ APP_META = {
     },
 }
 
+# ── ENTERPRISE PALETTE ────────────────────────────────────────────────────────
+ctk.set_appearance_mode("dark")
+ctk.set_default_color_theme("blue")
+
+BG_BASE     = "#09090f"
+SIDEBAR_BG  = "#0f172a"   # slate-900
+SURFACE     = "#1e293b"   # slate-800
+CARD_BG     = "#1e293b"
+HEADER_BG   = "#0f172a"
+BORDER      = "#334155"   # slate-700
+MUTED       = "#64748b"   # slate-500
+TEXT        = "#f1f5f9"   # slate-100
+TEXT_DIM    = "#94a3b8"   # slate-400
+ACCENT      = "#3b82f6"   # blue-500
+ACCENT_DARK = "#1d4ed8"   # blue-700
+SUCCESS     = "#10b981"
+DANGER      = "#ef4444"
+WIN_COLOR   = "#3b82f6"
+LINUX_COLOR = "#f59e0b"   # amber-500
+
+
 def format_size(n):
     for unit in ("B", "KB", "MB", "GB"):
         if n < 1024:
@@ -39,31 +72,177 @@ def format_size(n):
         n /= 1024
     return f"{n:.1f} TB"
 
+
 def guess_app_name(path):
     name = path.replace("-win-ia32.exe", "").replace("-win-x64.exe", "")
     name = name.replace("-1.0.0.AppImage", "").replace(".AppImage", "").replace(".exe", "")
     name = name.replace("-", " ").strip()
     return name
 
+
 def guess_platform(path):
     p = path.lower()
     if "ia32" in p:
-        return "Windows  32-bit", "#3b82f6"
+        return "Windows  32-bit", WIN_COLOR
     if "x64" in p or ".exe" in p:
-        return "Windows  64-bit", "#6366f1"
+        return "Windows  64-bit", WIN_COLOR
     if ".appimage" in p:
-        return "Linux  AppImage", "#f59e0b"
-    return "Unknown", "#6b7280"
+        return "Linux  AppImage", LINUX_COLOR
+    return "Unknown", MUTED
 
-# ── THEME ────────────────────────────────────────────────────────────────────
-ctk.set_appearance_mode("dark")
-ctk.set_default_color_theme("blue")
 
-CARD_BG     = "#1a1a2e"
-ACCENT      = "#0d6efd"
-SUCCESS     = "#10b981"
-SIDEBAR_BG  = "#0f0f1a"
-HEADER_BG   = "#12122a"
+# ════════════════════════════════════════════════════════════════════════════
+class StatCard(ctk.CTkFrame):
+    """Summary stat card shown at top of dashboard."""
+
+    def __init__(self, master, label: str, value: str, accent: str, icon: str):
+        super().__init__(master, fg_color=SURFACE, corner_radius=10,
+                         border_width=1, border_color=BORDER)
+        self.columnconfigure(0, weight=1)
+        ctk.CTkLabel(self, text=icon, font=ctk.CTkFont(size=20)).grid(
+            row=0, column=0, padx=16, pady=(14, 2), sticky="w"
+        )
+        self._val_lbl = ctk.CTkLabel(
+            self, text=value,
+            font=ctk.CTkFont(size=28, weight="bold"),
+            text_color=accent, anchor="w"
+        )
+        self._val_lbl.grid(row=1, column=0, padx=16, pady=0, sticky="w")
+        ctk.CTkLabel(
+            self, text=label, font=ctk.CTkFont(size=11),
+            text_color=TEXT_DIM, anchor="w"
+        ).grid(row=2, column=0, padx=16, pady=(0, 14), sticky="w")
+
+    def update_value(self, value: str):
+        self._val_lbl.configure(text=value)
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class SkeletonCard(ctk.CTkFrame):
+    """Animated placeholder shown while file list is loading."""
+
+    def __init__(self, master):
+        super().__init__(master, fg_color=CARD_BG, corner_radius=10,
+                         border_width=1, border_color=BORDER, height=80)
+        self.grid_propagate(False)
+        self.columnconfigure(1, weight=1)
+        self._step   = 0
+        self._colors = [BORDER, SURFACE, BORDER]
+
+        self._icon = ctk.CTkFrame(self, width=36, height=36, corner_radius=18,
+                                   fg_color=BORDER)
+        self._icon.grid(row=0, column=0, rowspan=2, padx=16, pady=16)
+        self._icon.grid_propagate(False)
+
+        self._title = ctk.CTkFrame(self, height=14, corner_radius=4, fg_color=BORDER)
+        self._title.grid(row=0, column=1, padx=6, pady=(18, 4), sticky="ew")
+        self._title.grid_propagate(False)
+
+        self._sub = ctk.CTkFrame(self, height=10, corner_radius=4, fg_color=SURFACE)
+        self._sub.grid(row=1, column=1, padx=6, pady=(0, 18), sticky="ew")
+        self._sub.grid_propagate(False)
+
+        self.columnconfigure(2, weight=0, minsize=140)
+        self._btn_ph = ctk.CTkFrame(self, width=120, height=34, corner_radius=6,
+                                     fg_color=BORDER)
+        self._btn_ph.grid(row=0, column=3, rowspan=2, padx=16, pady=16)
+        self._btn_ph.grid_propagate(False)
+
+        self._animate()
+
+    def _animate(self):
+        if not self.winfo_exists():
+            return
+        self._step = (self._step + 1) % len(self._colors)
+        self._title.configure(fg_color=self._colors[self._step])
+        self._sub.configure(fg_color=self._colors[(self._step + 1) % len(self._colors)])
+        self.after(500, self._animate)
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class ChangelogEntry(ctk.CTkFrame):
+    """One commit entry in the Changelog panel."""
+
+    def __init__(self, master, commit: dict):
+        super().__init__(master, fg_color=SURFACE, corner_radius=8,
+                         border_width=1, border_color=BORDER)
+        self.columnconfigure(0, weight=1)
+
+        title  = commit.get("title") or commit.get("message", "—")
+        sha    = (commit.get("id") or "")[:7]
+        date   = (commit.get("date") or "")[:10]
+        author = commit.get("authors") or [{}]
+        author_name = author[0].get("name", "—") if author else "—"
+
+        ctk.CTkLabel(self, text=title,
+                     font=ctk.CTkFont(size=13, weight="bold"),
+                     text_color=TEXT, anchor="w", wraplength=560).grid(
+            row=0, column=0, padx=14, pady=(12, 2), sticky="w"
+        )
+        ctk.CTkLabel(self, text=f"#{sha}  ·  {author_name}  ·  {date}",
+                     font=ctk.CTkFont(size=10),
+                     text_color=TEXT_DIM, anchor="w").grid(
+            row=1, column=0, padx=14, pady=(0, 12), sticky="w"
+        )
+
+
+# ════════════════════════════════════════════════════════════════════════════
+class RepoCard(ctk.CTkFrame):
+    """Clickable repo card in Explorer panel."""
+
+    def __init__(self, master, repo: dict, repo_type: str, on_select):
+        meta = REPO_TYPE_META.get(repo_type, {"icon": "📦", "color": ACCENT, "label": repo_type})
+        self._repo      = repo
+        self._repo_type = repo_type
+        self._on_select = on_select
+        super().__init__(master, fg_color=SURFACE, corner_radius=8,
+                         border_width=1, border_color=BORDER, cursor="hand2")
+        self.columnconfigure(1, weight=1)
+
+        ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=18)).grid(
+            row=0, column=0, rowspan=2, padx=(12, 6), pady=10
+        )
+
+        repo_id  = repo.get("id") or repo.get("modelId", "")
+        short_id = repo_id.split("/")[-1] if "/" in repo_id else repo_id
+        last_mod = (repo.get("lastModified") or repo.get("updatedAt") or "")[:10]
+        downloads = repo.get("downloads") or repo.get("downloadsAllTime") or ""
+        private  = "🔒" if repo.get("private") else ""
+
+        self._name_lbl = ctk.CTkLabel(
+            self, text=short_id,
+            font=ctk.CTkFont(size=12, weight="bold"),
+            text_color=TEXT, anchor="w"
+        )
+        self._name_lbl.grid(row=0, column=1, padx=4, pady=(10, 1), sticky="w")
+
+        info_parts = [meta["label"]]
+        if downloads:
+            info_parts.append(f"↓{downloads}")
+        if last_mod:
+            info_parts.append(last_mod)
+        if private:
+            info_parts.append(private)
+        ctk.CTkLabel(
+            self, text="  ·  ".join(info_parts),
+            font=ctk.CTkFont(size=10), text_color=TEXT_DIM, anchor="w"
+        ).grid(row=1, column=1, padx=4, pady=(0, 10), sticky="w")
+
+        ctk.CTkLabel(
+            self, text=meta["label"],
+            fg_color=meta["color"], corner_radius=4,
+            font=ctk.CTkFont(size=9, weight="bold"), padx=6, pady=1,
+            text_color="white"
+        ).grid(row=0, column=2, padx=8, pady=(10, 0), sticky="e")
+
+        for w in (self, self._name_lbl):
+            w.bind("<Button-1>", lambda e: self._on_select(self._repo, self._repo_type))
+
+    def set_active(self, active: bool):
+        self.configure(
+            fg_color="#1e3a5f" if active else SURFACE,
+            border_color=ACCENT if active else BORDER
+        )
 
 
 # ════════════════════════════════════════════════════════════════════════════
@@ -71,61 +250,68 @@ class AppCard(ctk.CTkFrame):
     """Single file download card."""
 
     def __init__(self, master, file_info: dict, download_dir: str, status_cb):
-        super().__init__(master, fg_color=CARD_BG, corner_radius=10)
+        super().__init__(master, fg_color=CARD_BG, corner_radius=10,
+                         border_width=1, border_color=BORDER)
 
         self.file_info    = file_info
         self.download_dir = download_dir
         self.status_cb    = status_cb
         self._thread      = None
 
-        path   = file_info["path"]
-        size   = file_info.get("size", 0)
+        path     = file_info["path"]
+        size     = file_info.get("size", 0)
         app_name = guess_app_name(path)
-        meta   = APP_META.get(app_name, {"icon": "📦", "desc": path})
+        meta     = APP_META.get(app_name, {"icon": "📦", "desc": path})
         plat, plat_color = guess_platform(path)
 
         self.columnconfigure(1, weight=1)
 
         # Icon
-        icon_lbl = ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=32))
-        icon_lbl.grid(row=0, column=0, rowspan=2, padx=(16, 10), pady=16)
+        ctk.CTkLabel(self, text=meta["icon"], font=ctk.CTkFont(size=32)).grid(
+            row=0, column=0, rowspan=2, padx=(16, 10), pady=16
+        )
 
         # App name
-        name_lbl = ctk.CTkLabel(self, text=app_name,
-                                 font=ctk.CTkFont(size=15, weight="bold"),
-                                 anchor="w")
-        name_lbl.grid(row=0, column=1, sticky="sw", padx=4, pady=(14, 0))
+        ctk.CTkLabel(self, text=app_name,
+                     font=ctk.CTkFont(size=15, weight="bold"),
+                     text_color=TEXT, anchor="w").grid(
+            row=0, column=1, sticky="sw", padx=4, pady=(14, 0)
+        )
 
         # Description + size
-        desc_lbl = ctk.CTkLabel(self,
-                                 text=f"{meta['desc']}   •   {format_size(size)}",
-                                 font=ctk.CTkFont(size=11),
-                                 text_color="#9ca3af", anchor="w")
-        desc_lbl.grid(row=1, column=1, sticky="nw", padx=4, pady=(0, 14))
+        ctk.CTkLabel(self, text=f"{meta['desc']}   •   {format_size(size)}",
+                     font=ctk.CTkFont(size=11),
+                     text_color=TEXT_DIM, anchor="w").grid(
+            row=1, column=1, sticky="nw", padx=4, pady=(0, 14)
+        )
 
         # Platform badge
-        badge = ctk.CTkLabel(self, text=plat, fg_color=plat_color,
-                              corner_radius=6, font=ctk.CTkFont(size=10, weight="bold"),
-                              padx=8, pady=2)
-        badge.grid(row=0, column=2, padx=8, pady=(14, 0), sticky="e")
+        ctk.CTkLabel(self, text=plat, fg_color=plat_color,
+                     corner_radius=6, font=ctk.CTkFont(size=10, weight="bold"),
+                     padx=8, pady=2).grid(
+            row=0, column=2, padx=8, pady=(14, 0), sticky="e"
+        )
 
         # Filename label (small)
-        fn_lbl = ctk.CTkLabel(self, text=path, font=ctk.CTkFont(size=10),
-                               text_color="#6b7280", anchor="e")
-        fn_lbl.grid(row=1, column=2, padx=8, pady=(0, 14), sticky="e")
+        ctk.CTkLabel(self, text=path, font=ctk.CTkFont(size=10),
+                     text_color=MUTED, anchor="e").grid(
+            row=1, column=2, padx=8, pady=(0, 14), sticky="e"
+        )
 
         # Download button
         self.btn = ctk.CTkButton(self, text="⬇  Download", width=130,
+                                  fg_color=ACCENT, hover_color=ACCENT_DARK,
                                   command=self._start_download)
         self.btn.grid(row=0, column=3, rowspan=2, padx=16, pady=16)
 
         # Progress bar (hidden initially)
-        self.pbar = ctk.CTkProgressBar(self, width=130)
+        self.pbar = ctk.CTkProgressBar(self, width=130,
+                                        progress_color=ACCENT, fg_color=BORDER)
         self.pbar.set(0)
 
         # Percent label
         self.pct_lbl = ctk.CTkLabel(self, text="", font=ctk.CTkFont(size=10),
-                                     text_color="#9ca3af")
+                                     text_color=TEXT_DIM)
 
     # ── download logic ────────────────────────────────────────────────────────
     def _start_download(self):
@@ -143,7 +329,7 @@ class AppCard(ctk.CTkFrame):
         total      = self.file_info.get("size", 0)
         url        = f"{HF_CDN_BASE}/{urllib.parse.quote(path)}"
         dest       = os.path.join(self.download_dir, path)
-        chunk_size = 65536  # 64 KB
+        chunk_size = 65536
 
         try:
             self.btn.configure(text="Connecting…")
@@ -163,23 +349,20 @@ class AppCard(ctk.CTkFrame):
                                     text=f"{format_size(downloaded)} / {format_size(total)}  ({pct*100:.0f}%)"
                                 )
 
-            # ── Verify size ───────────────────────────────────────────────────
             if total > 0 and downloaded != total:
                 raise IOError(
                     f"Incomplete download: got {format_size(downloaded)}, expected {format_size(total)}"
                 )
 
-            # ── Done ─────────────────────────────────────────────────────────
             self.btn.configure(text="✓  Done", fg_color=SUCCESS, state="normal")
             self.pbar.set(1)
             self.pct_lbl.configure(text=f"Saved → {dest}")
             self.status_cb(f"✓ Downloaded: {path}")
 
         except Exception as exc:
-            self.btn.configure(text="⚠  Retry", state="normal", fg_color="#ef4444")
+            self.btn.configure(text="⚠  Retry", state="normal", fg_color=DANGER)
             self.pct_lbl.configure(text=f"Error: {exc}")
             self.status_cb(f"✗ Failed: {path} — {exc}")
-            # Remove incomplete file if it exists
             if os.path.exists(dest):
                 try:
                     os.remove(dest)
@@ -193,10 +376,14 @@ class ChahuadevHub(ctk.CTk):
     def __init__(self):
         super().__init__()
         self.title("Chahuadev Hub")
-        self.geometry("1020x680")
-        self.minsize(860, 560)
-        self._filter = "All"
-        self._cards  = []
+        self.geometry("1080x720")
+        self.minsize(900, 580)
+        self.configure(fg_color=BG_BASE)
+        self._filter    = "All"
+        self._cards     = []
+        self._all_files = []
+        self._skeletons = []
+        self._nav       = "downloads"
 
         self._build_layout()
         threading.Thread(target=self._fetch_files, daemon=True).start()
@@ -208,104 +395,237 @@ class ChahuadevHub(ctk.CTk):
         self.grid_columnconfigure(1, weight=1)
 
         # ── Sidebar ──────────────────────────────────────────────────────────
-        self.sidebar = ctk.CTkFrame(self, width=210, corner_radius=0,
+        self.sidebar = ctk.CTkFrame(self, width=220, corner_radius=0,
                                      fg_color=SIDEBAR_BG)
         self.sidebar.grid(row=0, column=0, rowspan=2, sticky="nsew")
         self.sidebar.grid_propagate(False)
-        self.sidebar.grid_rowconfigure(10, weight=1)
+        self.sidebar.grid_rowconfigure(20, weight=1)
 
-        logo = ctk.CTkLabel(self.sidebar, text="CHAHUADEV\nHUB",
-                             font=ctk.CTkFont(size=22, weight="bold"),
-                             text_color="#7c3aed")
-        logo.grid(row=0, column=0, padx=20, pady=(24, 8))
+        ctk.CTkLabel(self.sidebar, text="CHAHUADEV\nHUB",
+                     font=ctk.CTkFont(size=22, weight="bold"),
+                     text_color="#7c3aed").grid(
+            row=0, column=0, padx=20, pady=(28, 4)
+        )
+        ctk.CTkLabel(self.sidebar, text="Official App Distribution",
+                     font=ctk.CTkFont(size=10), text_color=MUTED).grid(
+            row=1, column=0, padx=20, pady=(0, 24)
+        )
 
-        sub = ctk.CTkLabel(self.sidebar, text="Official App Distribution",
-                            font=ctk.CTkFont(size=10), text_color="#6b7280")
-        sub.grid(row=1, column=0, padx=20, pady=(0, 24))
+        # ─ Navigation ─
+        ctk.CTkLabel(self.sidebar, text="NAVIGATE",
+                     font=ctk.CTkFont(size=10, weight="bold"),
+                     text_color=MUTED).grid(row=2, column=0, padx=20, sticky="w")
 
+        self._nav_btns = {}
+        for i, (label, key) in enumerate([
+            ("  ⬇  Downloads", "downloads"),
+            ("  �  Explorer",  "explorer"),
+            ("  �📋  Changelog", "changelog"),
+        ], start=3):
+            btn = ctk.CTkButton(
+                self.sidebar, text=label, anchor="w",
+                fg_color=ACCENT if key == "downloads" else "transparent",
+                hover_color=ACCENT_DARK,
+                command=lambda k=key: self._switch_nav(k)
+            )
+            btn.grid(row=i, column=0, padx=12, pady=3, sticky="ew")
+            self._nav_btns[key] = btn
+
+        # ─ Filter ─
         ctk.CTkLabel(self.sidebar, text="FILTER BY PLATFORM",
                      font=ctk.CTkFont(size=10, weight="bold"),
-                     text_color="#4b5563").grid(row=2, column=0, padx=20, sticky="w")
+                     text_color=MUTED).grid(row=6, column=0, padx=20, pady=(20, 4), sticky="w")
 
         self._filter_btns = {}
         for i, (label, key) in enumerate([
             ("  All Files", "All"),
-            ("  Windows", "Windows"),
-            ("  Linux", "Linux"),
-        ], start=3):
+            ("  🪟  Windows", "Windows"),
+            ("  🐧  Linux", "Linux"),
+        ], start=7):
             btn = ctk.CTkButton(
                 self.sidebar, text=label, anchor="w",
                 fg_color=ACCENT if key == "All" else "transparent",
-                hover_color="#1d4ed8",
-                command=lambda k=key: self._set_filter(k),
+                hover_color=ACCENT_DARK,
+                command=lambda k=key: self._set_filter(k)
             )
-            btn.grid(row=i, column=0, padx=12, pady=4, sticky="ew")
+            btn.grid(row=i, column=0, padx=12, pady=3, sticky="ew")
             self._filter_btns[key] = btn
 
-        # Download folder button
+        # ─ Bottom actions ─
         ctk.CTkButton(
             self.sidebar, text="📂  Open Downloads",
-            fg_color="transparent", hover_color="#1f2937",
+            fg_color="transparent", hover_color=SURFACE,
             command=self._open_download_dir,
-        ).grid(row=10, column=0, padx=12, pady=(0, 8), sticky="ew")
+        ).grid(row=20, column=0, padx=12, pady=(0, 6), sticky="ew")
 
         ctk.CTkButton(
             self.sidebar, text="🔄  Refresh",
-            fg_color="transparent", hover_color="#1f2937",
+            fg_color="transparent", hover_color=SURFACE,
             command=self._refresh,
-        ).grid(row=11, column=0, padx=12, pady=(0, 24), sticky="ew")
+        ).grid(row=21, column=0, padx=12, pady=(0, 6), sticky="ew")
+
+        ctk.CTkButton(
+            self.sidebar, text="🔗  Hugging Face",
+            fg_color="transparent", hover_color=SURFACE,
+            command=lambda: webbrowser.open(f"https://huggingface.co/{HF_REPO}")
+        ).grid(row=22, column=0, padx=12, pady=(0, 20), sticky="ew")
 
         # ── Main area ────────────────────────────────────────────────────────
-        main = ctk.CTkFrame(self, fg_color=HEADER_BG, corner_radius=0)
-        main.grid(row=0, column=1, sticky="nsew")
-        main.grid_rowconfigure(1, weight=1)
-        main.grid_columnconfigure(0, weight=1)
+        self.main = ctk.CTkFrame(self, fg_color=HEADER_BG, corner_radius=0)
+        self.main.grid(row=0, column=1, sticky="nsew")
+        self.main.grid_rowconfigure(2, weight=1)
+        self.main.grid_columnconfigure(0, weight=1)
 
         # Header bar
-        hdr = ctk.CTkFrame(main, fg_color="#0a0a1a", corner_radius=0, height=64)
+        hdr = ctk.CTkFrame(self.main, fg_color=BG_BASE, corner_radius=0, height=64)
         hdr.grid(row=0, column=0, sticky="ew")
         hdr.grid_columnconfigure(0, weight=1)
         hdr.grid_propagate(False)
 
         self.hdr_title = ctk.CTkLabel(
             hdr, text="Available Downloads",
-            font=ctk.CTkFont(size=18, weight="bold"), anchor="w"
+            font=ctk.CTkFont(size=18, weight="bold"),
+            text_color=TEXT, anchor="w"
         )
         self.hdr_title.grid(row=0, column=0, padx=24, pady=18, sticky="w")
 
         self.hdr_count = ctk.CTkLabel(
-            hdr, text="Loading…", font=ctk.CTkFont(size=12),
-            text_color="#6b7280", anchor="e"
+            hdr, text="Fetching…",
+            font=ctk.CTkFont(size=12), text_color=MUTED, anchor="e"
         )
         self.hdr_count.grid(row=0, column=1, padx=24, pady=18, sticky="e")
 
-        # Scrollable card list
-        self.scroll = ctk.CTkScrollableFrame(main, fg_color=HEADER_BG, corner_radius=0)
-        self.scroll.grid(row=1, column=0, sticky="nsew", padx=0, pady=0)
-        self.scroll.grid_columnconfigure(0, weight=1)
+        # Stats cards row
+        stats_row = ctk.CTkFrame(self.main, fg_color=HEADER_BG, corner_radius=0, height=110)
+        stats_row.grid(row=1, column=0, sticky="ew", padx=20, pady=(10, 0))
+        stats_row.grid_columnconfigure((0, 1, 2), weight=1)
+        stats_row.grid_propagate(False)
+
+        self._stat_total = StatCard(stats_row, "Total Files",   "—", ACCENT,     "📦")
+        self._stat_win   = StatCard(stats_row, "Windows Files", "—", WIN_COLOR,  "🪟")
+        self._stat_linux = StatCard(stats_row, "Linux Files",   "—", LINUX_COLOR,"🐧")
+        self._stat_total.grid(row=0, column=0, padx=(0, 8), pady=0, sticky="nsew")
+        self._stat_win.grid  (row=0, column=1, padx=8,      pady=0, sticky="nsew")
+        self._stat_linux.grid(row=0, column=2, padx=(8, 0), pady=0, sticky="nsew")
+
+        # Content frame (holds downloads & changelog panels)
+        self.content_frame = ctk.CTkFrame(self.main, fg_color=HEADER_BG, corner_radius=0)
+        self.content_frame.grid(row=2, column=0, sticky="nsew", padx=0, pady=(12, 0))
+        self.content_frame.grid_rowconfigure(0, weight=1)
+        self.content_frame.grid_columnconfigure(0, weight=1)
+
+        # Downloads panel
+        self.downloads_panel = ctk.CTkScrollableFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.downloads_panel.grid(row=0, column=0, sticky="nsew")
+        self.downloads_panel.grid_columnconfigure(0, weight=1)
+
+        for i in range(4):
+            sk = SkeletonCard(self.downloads_panel)
+            sk.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
+            self._skeletons.append(sk)
+
+        # ── Explorer panel (hidden initially) ────────────────────────────────
+        self.explorer_panel = ctk.CTkFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.explorer_panel.grid(row=0, column=0, sticky="nsew")
+        self.explorer_panel.grid_rowconfigure(0, weight=1)
+        self.explorer_panel.grid_columnconfigure(0, weight=0, minsize=280)
+        self.explorer_panel.grid_columnconfigure(1, weight=1)
+        self.explorer_panel.grid_remove()
+
+        # Left: repo list
+        self._repo_list_frame = ctk.CTkScrollableFrame(
+            self.explorer_panel, fg_color=SURFACE, corner_radius=0, width=260
+        )
+        self._repo_list_frame.grid(row=0, column=0, sticky="nsew", padx=(0, 1))
+        self._repo_list_frame.grid_columnconfigure(0, weight=1)
+
+        self._repo_loading_lbl = ctk.CTkLabel(
+            self._repo_list_frame, text="⏳  Fetching repos…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        self._repo_loading_lbl.grid(row=0, column=0, pady=40)
 
-        # Loading spinner label (replaced by cards once loaded)
-        self.loading_lbl = ctk.CTkLabel(
-            self.scroll, text="⏳  Fetching file list from Hugging Face…",
-            font=ctk.CTkFont(size=14), text_color="#6b7280"
+        # Right: commit detail
+        self._commit_frame = ctk.CTkFrame(
+            self.explorer_panel, fg_color=HEADER_BG, corner_radius=0
         )
-        self.loading_lbl.grid(row=0, column=0, pady=60)
+        self._commit_frame.grid(row=0, column=1, sticky="nsew")
+        self._commit_frame.grid_rowconfigure(1, weight=1)
+        self._commit_frame.grid_columnconfigure(0, weight=1)
+
+        self._commit_hdr = ctk.CTkLabel(
+            self._commit_frame,
+            text="← Select a repo to view commits",
+            font=ctk.CTkFont(size=13), text_color=MUTED, anchor="w"
+        )
+        self._commit_hdr.grid(row=0, column=0, padx=20, pady=14, sticky="w")
 
-        # ── Status bar ───────────────────────────────────────────────────────
+        self._commit_scroll = ctk.CTkScrollableFrame(
+            self._commit_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self._commit_scroll.grid(row=1, column=0, sticky="nsew")
+        self._commit_scroll.grid_columnconfigure(0, weight=1)
+
+        self._repo_cards: list = []
+        self._active_repo_card = None
+
+        # Changelog panel (hidden initially)
+        self.changelog_panel = ctk.CTkScrollableFrame(
+            self.content_frame, fg_color=HEADER_BG, corner_radius=0
+        )
+        self.changelog_panel.grid(row=0, column=0, sticky="nsew")
+        self.changelog_panel.grid_columnconfigure(0, weight=1)
+        self.changelog_panel.grid_remove()
+
+        self._changelog_lbl = ctk.CTkLabel(
+            self.changelog_panel, text="⏳  Loading commit history…",
+            font=ctk.CTkFont(size=14), text_color=MUTED
+        )
+        self._changelog_lbl.grid(row=0, column=0, pady=60)
+
+        # Status bar
         self.statusbar = ctk.CTkLabel(
-            self, text=f"Download folder: {DOWNLOAD_DIR}",
-            font=ctk.CTkFont(size=10), text_color="#4b5563",
-            fg_color="#09090f", anchor="w", corner_radius=0
+            self, text=f"  Download folder: {DOWNLOAD_DIR}",
+            font=ctk.CTkFont(size=10), text_color=MUTED,
+            fg_color=BG_BASE, anchor="w", corner_radius=0
         )
-        self.statusbar.grid(row=1, column=1, sticky="ew", padx=12, pady=4)
+        self.statusbar.grid(row=1, column=1, sticky="ew", padx=0, pady=0)
 
-    # ── API fetch ─────────────────────────────────────────────────────────────
+    # ── Navigation ───────────────────────────────────────────────────────────
+    def _switch_nav(self, key: str):
+        self._nav = key
+        for k, btn in self._nav_btns.items():
+            btn.configure(fg_color=ACCENT if k == key else "transparent")
+
+        self.downloads_panel.grid_remove()
+        self.explorer_panel.grid_remove()
+        self.changelog_panel.grid_remove()
+
+        if key == "downloads":
+            self.hdr_title.configure(text="Available Downloads")
+            self.downloads_panel.grid()
+        elif key == "explorer":
+            self.hdr_title.configure(text="🔍  Repo Explorer — huggingface.co/chahuadev")
+            self.hdr_count.configure(text="")
+            self.explorer_panel.grid()
+            if not hasattr(self, "_explorer_loaded"):
+                threading.Thread(target=self._fetch_all_repos, daemon=True).start()
+        else:
+            self.hdr_title.configure(text="Changelog — Commit History")
+            self.changelog_panel.grid()
+            if not hasattr(self, "_changelog_loaded"):
+                threading.Thread(target=self._fetch_changelog, daemon=True).start()
+
+    # ── API fetch — files ─────────────────────────────────────────────────────
     def _fetch_files(self):
         try:
             resp  = requests.get(HF_API_URL, timeout=15)
             resp.raise_for_status()
             files = resp.json()
-            # Keep only "blob" type (actual files) and skip metadata files
             blobs = [f for f in files
                      if f.get("type") == "file" and f["path"] not in SKIP_FILES]
             self.after(0, self._populate_cards, blobs)
@@ -313,8 +633,11 @@ class ChahuadevHub(ctk.CTk):
             self.after(0, self._show_error, str(exc))
 
     def _populate_cards(self, files: list):
-        self.loading_lbl.destroy()
+        for sk in self._skeletons:
+            sk.destroy()
+        self._skeletons.clear()
         self._all_files = files
+        self._update_stats(files)
         self._render_cards(files)
 
     def _render_cards(self, files: list):
@@ -323,7 +646,7 @@ class ChahuadevHub(ctk.CTk):
         self._cards.clear()
 
         for i, f in enumerate(files):
-            card = AppCard(self.scroll, f, DOWNLOAD_DIR, self._set_status)
+            card = AppCard(self.downloads_panel, f, DOWNLOAD_DIR, self._set_status)
             card.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
             self._cards.append(card)
 
@@ -332,28 +655,157 @@ class ChahuadevHub(ctk.CTk):
         self._set_status(f"Loaded {count} files from huggingface.co/{HF_REPO}")
 
     def _show_error(self, msg: str):
-        self.loading_lbl.configure(
+        for sk in self._skeletons:
+            sk.destroy()
+        self._skeletons.clear()
+        ctk.CTkLabel(
+            self.downloads_panel,
             text=f"⚠  Failed to connect to Hugging Face\n{msg}",
-            text_color="#ef4444"
-        )
+            font=ctk.CTkFont(size=14), text_color=DANGER
+        ).grid(row=0, column=0, pady=60)
         self._set_status(f"✗ Error: {msg}")
 
+    def _update_stats(self, files: list):
+        total = len(files)
+        wins  = sum(1 for f in files if ".exe" in f["path"].lower())
+        lins  = sum(1 for f in files if ".appimage" in f["path"].lower())
+        self._stat_total.update_value(str(total))
+        self._stat_win.update_value(str(wins))
+        self._stat_linux.update_value(str(lins))
+
+    # ── API fetch — ALL repos (Explorer) ─────────────────────────────────────
+    def _fetch_all_repos(self):
+        results = []
+        for url, rtype in [
+            (HF_DATASETS_API, "dataset"),
+            (HF_MODELS_API,   "model"),
+            (HF_SPACES_API,   "space"),
+        ]:
+            try:
+                resp = requests.get(url, timeout=15)
+                resp.raise_for_status()
+                for r in resp.json():
+                    results.append((r, rtype))
+            except Exception:
+                pass
+        results.sort(
+            key=lambda x: x[0].get("lastModified") or x[0].get("updatedAt") or "",
+            reverse=True
+        )
+        self.after(0, self._populate_repos, results)
+
+    def _populate_repos(self, results: list):
+        self._explorer_loaded = True
+        if hasattr(self, "_repo_loading_lbl") and self._repo_loading_lbl.winfo_exists():
+            self._repo_loading_lbl.destroy()
+
+        total = len(results)
+        types: dict = {}
+        for _, t in results:
+            types[t] = types.get(t, 0) + 1
+        parts = [f"{total} repos"]
+        for t in ("dataset", "model", "space"):
+            if types.get(t):
+                m = REPO_TYPE_META[t]
+                parts.append(f"{m['icon']} {types[t]} {m['label']}s")
+        self.hdr_count.configure(text="  ·  ".join(parts))
+        self._set_status(f"Loaded {total} repos from huggingface.co/{HF_AUTHOR}")
+
+        for i, (repo, rtype) in enumerate(results):
+            card = RepoCard(self._repo_list_frame, repo, rtype, self._on_repo_select)
+            card.grid(row=i, column=0, padx=8, pady=4, sticky="ew")
+            self._repo_cards.append(card)
+
+    def _on_repo_select(self, repo: dict, repo_type: str):
+        repo_id = repo.get("id") or repo.get("modelId", "")
+        for card in self._repo_cards:
+            cid = card._repo.get("id") or card._repo.get("modelId", "")
+            card.set_active(cid == repo_id)
+
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        self._commit_hdr.configure(text=f"📋  Commits — {repo_id}", text_color=TEXT)
+
+        lbl = ctk.CTkLabel(
+            self._commit_scroll, text="⏳  Loading commits…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        lbl.grid(row=0, column=0, pady=40)
+        threading.Thread(
+            target=self._fetch_repo_commits,
+            args=(repo_id, repo_type),
+            daemon=True
+        ).start()
+
+    def _fetch_repo_commits(self, repo_id: str, repo_type: str):
+        url = f"https://huggingface.co/api/{repo_type}s/{repo_id}/commits/main"
+        try:
+            resp = requests.get(url, timeout=15)
+            resp.raise_for_status()
+            commits = resp.json()
+            self.after(0, self._show_repo_commits, commits, repo_id)
+        except Exception as exc:
+            self.after(0, self._show_repo_commits_error, str(exc))
+
+    def _show_repo_commits(self, commits: list, repo_id: str):
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        if not commits:
+            ctk.CTkLabel(
+                self._commit_scroll, text="No commits found",
+                font=ctk.CTkFont(size=13), text_color=MUTED
+            ).grid(row=0, column=0, pady=40)
+            return
+        for i, commit in enumerate(commits):
+            entry = ChangelogEntry(self._commit_scroll, commit)
+            entry.grid(row=i, column=0, padx=12, pady=5, sticky="ew")
+        self._commit_scroll.grid_columnconfigure(0, weight=1)
+        self._set_status(f"{len(commits)} commits — {repo_id}")
+
+    def _show_repo_commits_error(self, msg: str):
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        ctk.CTkLabel(
+            self._commit_scroll, text=f"⚠  {msg}",
+            font=ctk.CTkFont(size=13), text_color=DANGER
+        ).grid(row=0, column=0, pady=40)
+
+    # ── API fetch — changelog ─────────────────────────────────────────────────
+    def _fetch_changelog(self):
+        try:
+            resp = requests.get(HF_COMMITS_URL, timeout=15)
+            resp.raise_for_status()
+            commits = resp.json()
+            self.after(0, self._populate_changelog, commits)
+        except Exception as exc:
+            self.after(0, self._changelog_error, str(exc))
+
+    def _populate_changelog(self, commits: list):
+        self._changelog_loaded = True
+        self._changelog_lbl.destroy()
+        for i, commit in enumerate(commits):
+            entry = ChangelogEntry(self.changelog_panel, commit)
+            entry.grid(row=i, column=0, padx=20, pady=6, sticky="ew")
+        self._set_status(f"Loaded {len(commits)} commits from Hugging Face")
+
+    def _changelog_error(self, msg: str):
+        self._changelog_lbl.configure(
+            text=f"⚠  Failed to load changelog\n{msg}", text_color=DANGER
+        )
+
     # ── Filter ────────────────────────────────────────────────────────────────
     def _set_filter(self, key: str):
         self._filter = key
         for k, btn in self._filter_btns.items():
             btn.configure(fg_color=ACCENT if k == key else "transparent")
-
-        if not hasattr(self, "_all_files"):
+        if not self._all_files:
             return
-
         if key == "All":
             filtered = self._all_files
         elif key == "Windows":
             filtered = [f for f in self._all_files if ".exe" in f["path"].lower()]
-        else:  # Linux
+        else:
             filtered = [f for f in self._all_files if ".appimage" in f["path"].lower()]
-
         self._render_cards(filtered)
 
     # ── Helpers ───────────────────────────────────────────────────────────────
@@ -362,22 +814,56 @@ class ChahuadevHub(ctk.CTk):
 
     def _open_download_dir(self):
         os.makedirs(DOWNLOAD_DIR, exist_ok=True)
-        os.startfile(DOWNLOAD_DIR)          # Windows only; harmless on error
+        if os.name == "nt":
+            os.startfile(DOWNLOAD_DIR)
+        else:
+            import subprocess
+            subprocess.Popen(["xdg-open", DOWNLOAD_DIR])
 
     def _refresh(self):
-        self._cards_clear()
-        self.loading_lbl = ctk.CTkLabel(
-            self.scroll, text="⏳  Refreshing…",
-            font=ctk.CTkFont(size=14), text_color="#6b7280"
-        )
-        self.loading_lbl.grid(row=0, column=0, pady=60)
-        self.hdr_count.configure(text="Loading…")
-        threading.Thread(target=self._fetch_files, daemon=True).start()
-
-    def _cards_clear(self):
         for card in self._cards:
             card.destroy()
         self._cards.clear()
+        self._all_files = []
+        self._stat_total.update_value("—")
+        self._stat_win.update_value("—")
+        self._stat_linux.update_value("—")
+        self.hdr_count.configure(text="Fetching…")
+
+        for i in range(4):
+            sk = SkeletonCard(self.downloads_panel)
+            sk.grid(row=i, column=0, padx=20, pady=8, sticky="ew")
+            self._skeletons.append(sk)
+
+        if hasattr(self, "_changelog_loaded"):
+            del self._changelog_loaded
+        for w in self.changelog_panel.winfo_children():
+            w.destroy()
+        self._changelog_lbl = ctk.CTkLabel(
+            self.changelog_panel, text="⏳  Loading commit history…",
+            font=ctk.CTkFont(size=14), text_color=MUTED
+        )
+        self._changelog_lbl.grid(row=0, column=0, pady=60)
+
+        # Reset explorer
+        if hasattr(self, "_explorer_loaded"):
+            del self._explorer_loaded
+        for card in self._repo_cards:
+            card.destroy()
+        self._repo_cards.clear()
+        self._active_repo_card = None
+        for w in self._commit_scroll.winfo_children():
+            w.destroy()
+        self._commit_hdr.configure(
+            text="← Select a repo to view commits", text_color=MUTED
+        )
+        self._repo_loading_lbl = ctk.CTkLabel(
+            self._repo_list_frame, text="⏳  Fetching repos…",
+            font=ctk.CTkFont(size=13), text_color=MUTED
+        )
+        self._repo_loading_lbl.grid(row=0, column=0, pady=40)
+
+        threading.Thread(target=self._fetch_files, daemon=True).start()
 
 
 # ════════════════════════════════════════════════════════════════════════════

packages/@chahuadev/chahuadev-hub-app/README.md

@@ -54,11 +54,41 @@ sudo npm install -g @chahuadev/chahuadev-hub-app --foreground-scripts --force
 ```bash
 chahuadev-hub
 ```
+> **Note:** Downloaded apps will be automatically saved to your `Downloads/ChahuadevHub` folder.
 
+> **If the command fails, go into the bin folder and run it directly:**
+>
+> ```bash
+> cd ~/.npm-global/lib/node_modules/@chahuadev/chahuadev-hub-app/bin
+> ./chahuadev_hub
+> ```
+>
+> If you installed with `sudo`, the folder may be under `/usr/local/lib/` instead:
+> ```bash
+> cd /usr/local/lib/node_modules/@chahuadev/chahuadev-hub-app/bin
+> ./chahuadev_hub
+> ```
 ---
 
 ## �️ Troubleshooting
 
+### `node\r: No such file or directory` error (Linux)
+
+This means the installed `index.js` has Windows line endings (CRLF). Fixed in v1.0.4+. 
+If you're on an older version, reinstall:
+
+```bash
+rm -rf ~/.npm-global/lib/node_modules/@chahuadev/chahuadev-hub-app
+npm install -g @chahuadev/chahuadev-hub-app --foreground-scripts --force
+```
+
+Or run the binary directly without going through the Node wrapper:
+
+```bash
+cd ~/.npm-global/lib/node_modules/@chahuadev/chahuadev-hub-app/bin
+./chahuadev_hub
+```
+
 ### ENOTEMPTY error on Linux (directory not empty)
 
 If you see `ENOTEMPTY` during install, a previous failed install left files behind. Clear them first:
@@ -83,6 +113,28 @@ source ~/.bashrc
 chahuadev-hub
 ```
 
+### `ModuleNotFoundError: No module named 'tkinter'` (Linux)
+
+The Linux binary requires `tkinter` to be present at build time. If you see this error, the downloaded binary was built on a system without `tkinter` installed. You need to build from source:
+
+```bash
+# 1. Install tkinter
+sudo apt-get install python3-tk python3-dev -y
+
+# 2. Install Python dependencies
+pip3 install customtkinter requests pyinstaller
+
+# 3. Go into the project folder
+cd /path/to/Chahuadev-Hub-Python
+
+# 4. Build the binary
+python3 -m PyInstaller --onefile chahuadev_hub.py
+
+# 5. Run it
+cd dist
+./chahuadev_hub
+```
+
 ---
 
 ## �🚀 What It Does

packages/@chahuadev/chahuadev-hub-app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@chahuadev/chahuadev-hub-app",
-  "version": "1.0.3",
+  "version": "1.0.6",
   "description": "Chahuadev Hub — Official app launcher and distribution hub by Chahuadev",
   "main": "index.js",
   "bin": {