Fix Windows Cookbook background tasks, exit statuses, and empty SSH logs wrapper (#1389)

This commit consolidates all Windows Cookbook background fixes into a single comprehensive commit based on the latest main branch.

Key fixes included:
1. React looksSuccessful Mismatch: Append 'DOWNLOAD_OK' for pip install commands in routes/cookbook_routes.py.
2. Local Windows SSH Wrapper & Log Directory Mismatch: Bypassed ssh wrappers and dynamically selected odysseus-tmux logs for local tasks in static/js/cookbookRunning.js.
3. WSL Bash Filtration: Filtered out the WSL bash stub at C:\Windows\System32\bash.exe in core/platform_compat.py.
4. Drive-Colon Path Normalization: Replaced .as_posix() with git_bash_path() in routes/shell_routes.py and src/bg_jobs.py.
5. GGUF-Only Hardware Fitting: Restructured local Windows recommendations to rank GGUF only in services/hwfit/fit.py.
6. Safe Win32 Process Liveness Probe: Replaced os.kill(pid, 0) with a safe Win32 API probe using GetExitCodeProcess in core/platform_compat.py.
7. Prebuilt llama-cpp-python Wheels: Supply the CPU extra index during compilation failure fallback.
8. Enforce UTF-8 log encoding: Set PYTHONIOENCODING=utf-8 on Windows bootstrap runners.
9. Fix Linux Llama.cpp Build script syntax error in routes/cookbook_helpers.py.
10. Page Reload Status Check: Run sys.executable instead of 'python3' to bypass Microsoft Store execution stubs on local Windows hosts.
11. Llama.cpp serve build bypass: Bypassed cmake compilation checks on local Windows and verified python bindings directly.
12. Serve Command Path Validation: Masked safe GGUF path printf subshells '' inside the serve command validator.
13. CPU Mismatch Diagnostics: Intercepted AVX2-lacking '0xc000001d' (Illegal Instruction) crashes in static/js/cookbook-diagnosis.js and guided users to Ollama.
14. Windows Pytest stability: Fixed stub import leakage in test files.

static/js/cookbookRunning.js

@@ -2738,6 +2738,7 @@ async function _reconnectTask(el, task) {
                   _updateTask(task.sessionId, { status: 'done', _doneConfirmAt: null, _lastStatusFlipAt: Date.now() });
                   const _el = document.querySelector(`.cookbook-task[data-task-id="${task.sessionId}"]`);
                   if (_el) {
+                    _clearDiagnosis(_el);
                     _el.dataset.status = 'done';
                     const _badge = _el.querySelector('.cookbook-task-status');
                     if (_badge) { _badge.textContent = _statusLabel('done', task.type); _badge.className = 'cookbook-task-status cookbook-task-done'; }
@@ -2804,13 +2805,14 @@ async function _reconnectTask(el, task) {
             const curProgress = computeProgressSignal(_bytes, _dlAgg, lastPct, snapshot);
             const _fetchPctMatches = [...snapshot.matchAll(/Fetching\s+\d+\s+files:\s*(\d+)%/g)];
             const _fetchPct = _fetchPctMatches.length ? parseInt(_fetchPctMatches[_fetchPctMatches.length - 1][1]) : null;
+            const isPipDep = !!(task.payload && task.payload._dep);
             const _startupStalled = !_bytes && ((_dlAgg === 0) || (_fetchPct === 0)) && curProgress === '0';
             const _STALE_TIMEOUT = _startupStalled ? STARTUP_STALE_PROGRESS_MS : STALE_PROGRESS_MS;
             if (!el._lastProgress) { el._lastProgress = curProgress; el._lastProgressTime = Date.now(); }
             if (curProgress !== el._lastProgress) {
               el._lastProgress = curProgress;
               el._lastProgressTime = Date.now();
-            } else if (Date.now() - (el._lastProgressTime || 0) > _STALE_TIMEOUT && task._autoRestarted) {
+            } else if (!isPipDep && Date.now() - (el._lastProgressTime || 0) > _STALE_TIMEOUT && task._autoRestarted) {
               const mins = Math.floor((Date.now() - (el._lastProgressTime || 0)) / 60000);
               // Already auto-restarted once and stalled again — make the badge a
               // one-click retry (resumes from the cached partial files) so the
@@ -2823,7 +2825,7 @@ async function _reconnectTask(el, task) {
                 badge._retryBound = true;
                 badge.addEventListener('click', (e) => { e.stopPropagation(); _retryTask(el, task); });
               }
-            } else if (Date.now() - (el._lastProgressTime || 0) > _STALE_TIMEOUT && !task._autoRestarted) {
+            } else if (!isPipDep && Date.now() - (el._lastProgressTime || 0) > _STALE_TIMEOUT && !task._autoRestarted) {
               task._autoRestarted = true;
               _updateTask(task.sessionId, { _autoRestarted: true });
               badge.textContent = _startupStalled ? '0% stall — retrying' : 'stale — restarting';
@@ -2975,6 +2977,7 @@ async function _reconnectTask(el, task) {
               break;
             }
             if (snapshot.includes('DOWNLOAD_OK') || (snapshot.includes('/snapshots/') && completed >= totalFiles && totalFiles > 0)) {
+              _clearDiagnosis(el);
               _dlRetryCount.delete(task.payload?.repo_id || task.name);
               badge.textContent = _statusLabel('done', task.type);
               badge.className = 'cookbook-task-status cookbook-task-done';