fix: sshfs polling, WebSocket broadcast, prompt progress bar, resizable stats panel

- log_watcher: add --reopen-log mode (close/reopen each poll) for sshfs/network
  filesystems; fix nonlocal clients bug causing UnboundLocalError on first broadcast;
  fix list(clients) copy to prevent RuntimeError on concurrent set mutation
- log_parser: capture progress=X.XX from prompt timing lines into Metrics.prompt_progress
- frontend: show progress bar during processing_prompt state with PROMPT N% label;
  widen stats panel to 300px; remove model name truncation; add drag handle on
  right border of stats panel to resize between 280px–840px

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/app.js

@@ -2,8 +2,10 @@
   'use strict';
 
   // ── DOM refs ──────────────────────────────────────────────────────────────
-  const body        = document.body;
+  const body         = document.body;
-  const wsDot       = document.getElementById('ws-dot');
+  const wsDot        = document.getElementById('ws-dot');
+  const statsPanel   = document.getElementById('stats-panel');
+  const resizeHandle = document.getElementById('resize-handle');
   const stateLabel  = document.getElementById('state-label');
   const progressFill  = document.getElementById('progress-fill');
   const progressLabel = document.getElementById('progress-label');
@@ -42,15 +44,20 @@
 
     stateLabel.textContent = state.replace('_', ' ').toUpperCase();
     svState.textContent    = state.replace('_', ' ');
-    svModel.textContent    = model ? truncate(model, 22) : '—';
+    svModel.textContent    = model || '—';
     svReqs.textContent     = request_count ?? 0;
 
-    // Loading progress
+    // Progress bar: model loading or prompt processing
     if (loading) {
       const pct = Math.round((loading.progress ?? 0) * 100);
       progressFill.style.width  = pct + '%';
       progressLabel.textContent = loading.current + '  ' + pct + '%';
       svLoadStage.textContent   = loading.current;
+    } else if (state === 'processing_prompt' && metrics && metrics.prompt_progress != null) {
+      const pct = Math.round(metrics.prompt_progress * 100);
+      progressFill.style.width  = pct + '%';
+      progressLabel.textContent = 'PROMPT  ' + pct + '%';
+      svLoadStage.textContent   = '—';
     } else {
       progressFill.style.width  = '0%';
       progressLabel.textContent = '';
@@ -72,6 +79,38 @@
     wsDot.classList.add('pulse');
   }
 
+  // ── Stats panel resize ───────────────────────────────────────────────────
+  const SCREEN_W = 280;
+  let dragStartX = 0, dragStartW = 0, dragging = false;
+
+  function startDrag(x) {
+    dragging   = true;
+    dragStartX = x;
+    dragStartW = statsPanel.offsetWidth;
+    resizeHandle.classList.add('dragging');
+    body.style.cursor     = 'ew-resize';
+    body.style.userSelect = 'none';
+  }
+  function onDrag(x) {
+    if (!dragging) return;
+    const w = Math.min(Math.max(dragStartW + (x - dragStartX), SCREEN_W), SCREEN_W * 3);
+    statsPanel.style.flex = '0 0 ' + w + 'px';
+  }
+  function endDrag() {
+    if (!dragging) return;
+    dragging = false;
+    resizeHandle.classList.remove('dragging');
+    body.style.cursor = body.style.userSelect = '';
+  }
+
+  resizeHandle.addEventListener('mousedown', e => { e.preventDefault(); startDrag(e.clientX); });
+  document.addEventListener('mousemove',  e => onDrag(e.clientX));
+  document.addEventListener('mouseup',    endDrag);
+
+  resizeHandle.addEventListener('touchstart', e => { e.preventDefault(); startDrag(e.touches[0].clientX); }, { passive: false });
+  document.addEventListener('touchmove',  e => { if (dragging) { e.preventDefault(); onDrag(e.touches[0].clientX); } }, { passive: false });
+  document.addEventListener('touchend',   endDrag);
+
   // ── WebSocket with auto-reconnect ─────────────────────────────────────────
   let ws = null;
   let retryDelay = 1000;

frontend/index.html

@@ -116,6 +116,7 @@
 
     <!-- ── Stats panel ────────────────────────────────────────────── -->
     <div id="stats-panel">
+      <div id="resize-handle" title="Drag to resize"></div>
       <div class="stat-row" id="row-model">
         <span class="sk">MODEL</span>
         <span class="sv" id="sv-model">—</span>

frontend/style.css

@@ -139,6 +139,9 @@ body.state-generating #speech-bubble { display: flex; }
 /* loading */
 body.state-loading #progress-wrap { display: flex; }
 
+/* processing_prompt */
+body.state-processing_prompt #progress-wrap { display: flex; }
+
 /* offline */
 body.state-offline #llama { opacity: 0.15; }
 
@@ -237,9 +240,40 @@ body.state-offline #llama { opacity: 0.15; }
   color: var(--amber-dim);
 }
 
+/* ── Resize handle ───────────────────────────────────────────────────────── */
+#resize-handle {
+  position: absolute;
+  right: -6px;
+  top: 0;
+  bottom: 0;
+  width: 12px;
+  cursor: ew-resize;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  opacity: 0.3;
+  transition: opacity 0.15s;
+  user-select: none;
+  z-index: 10;
+}
+#resize-handle:hover,
+#resize-handle.dragging { opacity: 1; }
+#resize-handle::after {
+  content: '';
+  width: 2px;
+  height: 48px;
+  background: var(--amber-dim);
+  border-radius: 1px;
+  box-shadow: -4px 0 0 var(--amber-dim), 4px 0 0 var(--amber-dim);
+}
+@media (orientation: portrait) {
+  #resize-handle { display: none; }
+}
+
 /* ── Stats panel ─────────────────────────────────────────────────────────── */
 #stats-panel {
-  flex: 0 0 220px;
+  position: relative;
+  flex: 0 0 300px;
   background: #0d0d06;
   border: 3px solid var(--amber-dim);
   border-radius: 12px;

log_parser.py

@@ -37,10 +37,11 @@ class LoadingInfo:
 
 @dataclass
 class Metrics:
-    prompt_speed: Optional[float] = None   # tokens/sec during prompt eval
+    prompt_speed: Optional[float] = None    # tokens/sec during prompt eval
-    prompt_tokens: Optional[int] = None    # total prompt tokens
+    prompt_tokens: Optional[int] = None     # total prompt tokens
-    gen_speed: Optional[float] = None      # tokens/sec during generation
+    prompt_progress: Optional[float] = None # 0.0–1.0 from live prompt timing lines
-    n_decoded: Optional[int] = None        # tokens decoded so far
+    gen_speed: Optional[float] = None       # tokens/sec during generation
+    n_decoded: Optional[int] = None         # tokens decoded so far
 
 
 @dataclass
@@ -72,7 +73,7 @@ _IDLE_RE = re.compile(r'update_slots: all slots are idle')
 _PROXY_RE = re.compile(r'proxy_reques: proxying request')
 _LAUNCH_RE = re.compile(r'slot launch_slot_:.*processing task')
 _PROMPT_TIMING_RE = re.compile(
-    r'slot print_timing:.*prompt processing, n_tokens =\s+(\d+),.*/ ([\d.]+) tokens per second'
+    r'slot print_timing:.*prompt processing, n_tokens =\s+(\d+), progress = ([\d.]+),.*/ ([\d.]+) tokens per second'
 )
 _GEN_TIMING_RE = re.compile(
     r'slot print_timing:.*n_decoded =\s+(\d+), tg =\s+([\d.]+) t/s'
@@ -137,8 +138,9 @@ class LogParser:
             return self._set(state="processing_prompt")
         if m := _PROMPT_TIMING_RE.search(content):
             metrics = Metrics(
-                prompt_speed=float(m.group(2)),
+                prompt_speed=float(m.group(3)),
                 prompt_tokens=int(m.group(1)),
+                prompt_progress=float(m.group(2)),
                 gen_speed=self._state.metrics.gen_speed,
                 n_decoded=self._state.metrics.n_decoded,
             )

log_watcher.py

@@ -15,11 +15,13 @@ class LogWatcher:
         on_line: Callable[[str], Awaitable[None]],
         on_offline: Optional[Callable[[], Awaitable[None]]] = None,
         offline_timeout: float = 60.0,
+        reopen: bool = False,
     ):
         self._path = Path(path)
         self._on_line = on_line
         self._on_offline = on_offline
         self._offline_timeout = offline_timeout
+        self._reopen = reopen
         self._task: Optional[asyncio.Task] = None
 
     def start(self) -> asyncio.Task:
@@ -33,6 +35,15 @@ class LogWatcher:
     async def _run(self):
         offline_since: Optional[float] = None
 
+        if self._reopen:
+            await self._run_reopen()
+        else:
+            await self._run_keepopen()
+
+    async def _run_keepopen(self):
+        """Default: keep file open and poll readline(). Works on local filesystems."""
+        offline_since: Optional[float] = None
+
         while True:
             try:
                 with open(self._path, 'r', errors='replace') as f:
@@ -54,7 +65,50 @@ class LogWatcher:
                     offline_since = now
                 elif now - offline_since >= self._offline_timeout and self._on_offline:
                     await self._on_offline()
-                    offline_since = None  # reset so we don't spam
+                    offline_since = None
+                await asyncio.sleep(min(self.FILE_RETRY_INTERVAL, self._offline_timeout))
+            except asyncio.CancelledError:
+                return
+
+    async def _run_reopen(self):
+        """Close and reopen each poll cycle. Use for network filesystems (e.g. sshfs)
+        that cache file content at open time and don't propagate remote appends to
+        held-open file descriptors."""
+        offline_since: Optional[float] = None
+        pos: int = -1  # -1 = not yet seeded
+
+        while True:
+            try:
+                with open(self._path, 'r', errors='replace') as f:
+                    f.seek(0, 2)
+                    end = f.tell()
+
+                    if pos < 0:
+                        f.seek(max(0, end - self.SEED_BYTES))
+                        if f.tell() > 0:
+                            f.readline()  # discard partial first line
+                        pos = f.tell()
+                    elif end < pos:
+                        pos = 0  # file truncated / rotated
+
+                    f.seek(pos)
+                    while True:
+                        line = f.readline()
+                        if line:
+                            pos = f.tell()
+                            await self._on_line(line)
+                        else:
+                            break
+
+                offline_since = None
+                await asyncio.sleep(self.POLL_INTERVAL)
+            except OSError:
+                now = asyncio.get_event_loop().time()
+                if offline_since is None:
+                    offline_since = now
+                elif now - offline_since >= self._offline_timeout and self._on_offline:
+                    await self._on_offline()
+                    offline_since = None
                 await asyncio.sleep(min(self.FILE_RETRY_INTERVAL, self._offline_timeout))
             except asyncio.CancelledError:
                 return

server.py

@@ -17,7 +17,7 @@ FRONTEND_DIR = Path(__file__).parent / "frontend"
 
 # ── App factory ───────────────────────────────────────────────────────────────
 
-def create_app(log_path: str) -> FastAPI:
+def create_app(log_path: str, reopen_log: bool = False) -> FastAPI:
     app = FastAPI()
     app.mount("/static", StaticFiles(directory=FRONTEND_DIR), name="static")
 
@@ -41,11 +41,11 @@ def create_app(log_path: str) -> FastAPI:
             clients.discard(ws)
 
     async def broadcast(state: ServerState):
-        nonlocal last_state
+        nonlocal last_state, clients
         last_state = state.to_dict()
         payload = json.dumps(last_state)
         dead: set[WebSocket] = set()
-        for ws in clients:
+        for ws in list(clients):
             try:
                 await ws.send_text(payload)
             except Exception:
@@ -63,7 +63,7 @@ def create_app(log_path: str) -> FastAPI:
 
     @app.on_event("startup")
     async def startup():
-        watcher = LogWatcher(log_path, on_line, on_offline=on_offline)
+        watcher = LogWatcher(log_path, on_line, on_offline=on_offline, reopen=reopen_log)
         watcher.start()
 
     return app
@@ -71,6 +71,13 @@ def create_app(log_path: str) -> FastAPI:
 
 # ── CLI entry point ───────────────────────────────────────────────────────────
 
+def _config_bool(key: str) -> bool:
+    config_file = Path("config.json")
+    if config_file.exists():
+        return bool(json.loads(config_file.read_text()).get(key, False))
+    return False
+
+
 def resolve_log_path(cli_log: Optional[str]) -> str:
     path = cli_log or os.environ.get("LLAMAGOCHI_LOG")
     if not path:
@@ -92,9 +99,12 @@ def main():
     ap = argparse.ArgumentParser(description="Llamagochi — llama-server virtual pet")
     ap.add_argument("--log", help="Path to llama-server log file")
     ap.add_argument("--port", type=int, default=8080, help="HTTP port (default: 8080)")
+    ap.add_argument("--reopen-log", action="store_true",
+                    help="Close and reopen log file each poll cycle (for sshfs/network filesystems)")
     args = ap.parse_args()
     log_path = resolve_log_path(args.log)
-    app = create_app(log_path)
+    reopen_log = args.reopen_log or _config_bool("reopen_log")
+    app = create_app(log_path, reopen_log=reopen_log)
     uvicorn.run(app, host="0.0.0.0", port=args.port)