Refactor web build process and update documentation

- Removed Node.js build artifacts from .gitignore and adjusted Makefile to reflect changes in web UI build process, now using server-rendered Go templates instead of React.
- Updated README to clarify the new web UI architecture and output formats, emphasizing the removal of the Node.js build step.
- Added a command to set the number of frames per render task in manager configuration, enhancing user control over rendering settings.
- Improved Gitea workflow by removing unnecessary npm install step, streamlining the CI process.

pkg/executils/exec.go

@@ -2,10 +2,13 @@ package executils
 
 import (
 	"bufio"
+	"context"
 	"errors"
 	"fmt"
+	"io"
 	"os"
 	"os/exec"
+	"strings"
 	"sync"
 	"time"
 
@@ -107,6 +110,78 @@ type CommandResult struct {
 	ExitCode int
 }
 
+// RunCommandWithTimeout is like RunCommand but kills the process after timeout.
+// A zero timeout means no timeout.
+func RunCommandWithTimeout(
+	timeout time.Duration,
+	cmdPath string,
+	args []string,
+	dir string,
+	env []string,
+	taskID int64,
+	tracker *ProcessTracker,
+) (*CommandResult, error) {
+	if timeout <= 0 {
+		return RunCommand(cmdPath, args, dir, env, taskID, tracker)
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), timeout)
+	defer cancel()
+	cmd := exec.CommandContext(ctx, cmdPath, args...)
+	cmd.Dir = dir
+	if env != nil {
+		cmd.Env = env
+	}
+	stdoutPipe, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create stdout pipe: %w", err)
+	}
+	stderrPipe, err := cmd.StderrPipe()
+	if err != nil {
+		return nil, fmt.Errorf("failed to create stderr pipe: %w", err)
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, fmt.Errorf("failed to start command: %w", err)
+	}
+	if tracker != nil {
+		tracker.Track(taskID, cmd)
+		defer tracker.Untrack(taskID)
+	}
+	var stdoutBuf, stderrBuf []byte
+	var stdoutErr, stderrErr error
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go func() {
+		defer wg.Done()
+		stdoutBuf, stdoutErr = readAll(stdoutPipe)
+	}()
+	go func() {
+		defer wg.Done()
+		stderrBuf, stderrErr = readAll(stderrPipe)
+	}()
+	waitErr := cmd.Wait()
+	wg.Wait()
+	if stdoutErr != nil && !isBenignPipeReadError(stdoutErr) {
+		return nil, fmt.Errorf("failed to read stdout: %w", stdoutErr)
+	}
+	if stderrErr != nil && !isBenignPipeReadError(stderrErr) {
+		return nil, fmt.Errorf("failed to read stderr: %w", stderrErr)
+	}
+	result := &CommandResult{Stdout: string(stdoutBuf), Stderr: string(stderrBuf)}
+	if waitErr != nil {
+		if exitErr, ok := waitErr.(*exec.ExitError); ok {
+			result.ExitCode = exitErr.ExitCode()
+		} else {
+			result.ExitCode = -1
+		}
+		if ctx.Err() == context.DeadlineExceeded {
+			return result, fmt.Errorf("command timed out after %v: %w", timeout, waitErr)
+		}
+		return result, waitErr
+	}
+	result.ExitCode = 0
+	return result, nil
+}
+
 // RunCommand executes a command and returns the output
 // If tracker is provided, the process will be registered for tracking
 // This is useful for commands where you need to capture output (like metadata extraction)
@@ -164,10 +239,10 @@ func RunCommand(
 	wg.Wait()
 
 	// Check for read errors
-	if stdoutErr != nil {
+	if stdoutErr != nil && !isBenignPipeReadError(stdoutErr) {
 		return nil, fmt.Errorf("failed to read stdout: %w", stdoutErr)
 	}
-	if stderrErr != nil {
+	if stderrErr != nil && !isBenignPipeReadError(stderrErr) {
 		return nil, fmt.Errorf("failed to read stderr: %w", stderrErr)
 	}
 
@@ -208,6 +283,18 @@ func readAll(r interface{ Read([]byte) (int, error) }) ([]byte, error) {
 	return buf, nil
 }
 
+// isBenignPipeReadError treats EOF-like pipe close races as non-fatal.
+func isBenignPipeReadError(err error) bool {
+	if err == nil {
+		return false
+	}
+	if errors.Is(err, io.EOF) || errors.Is(err, os.ErrClosed) || errors.Is(err, io.ErrClosedPipe) {
+		return true
+	}
+	// Some platforms return wrapped messages that don't map cleanly to sentinel errors.
+	return strings.Contains(strings.ToLower(err.Error()), "file already closed")
+}
+
 // LogSender is a function type for sending logs
 type LogSender func(taskID int, level types.LogLevel, message string, stepName string)
 

pkg/executils/exec_test.go

@@ -0,0 +1,32 @@
+package executils
+
+import (
+	"errors"
+	"io"
+	"os"
+	"testing"
+)
+
+func TestIsBenignPipeReadError(t *testing.T) {
+	tests := []struct {
+		name string
+		err  error
+		want bool
+	}{
+		{name: "nil", err: nil, want: false},
+		{name: "eof", err: io.EOF, want: true},
+		{name: "closed", err: os.ErrClosed, want: true},
+		{name: "closed pipe", err: io.ErrClosedPipe, want: true},
+		{name: "wrapped closed", err: errors.New("read |0: file already closed"), want: true},
+		{name: "other", err: errors.New("permission denied"), want: false},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			got := isBenignPipeReadError(tc.err)
+			if got != tc.want {
+				t.Fatalf("got %v, want %v (err=%v)", got, tc.want, tc.err)
+			}
+		})
+	}
+}

pkg/scripts/scripts/render_blender.py.template

@@ -95,31 +95,20 @@ if current_device:
 print(f"Blend file output format: {current_output_format}")
 
 # Override output format if specified
-# The format file always takes precedence (it's written specifically for this job)
+# Render output is EXR only and must remain linear for the encode pipeline (linear -> sRGB -> HLG).
 if output_format_override:
-    print(f"Overriding output format from '{current_output_format}' to '{output_format_override}'")
-    # Map common format names to Blender's format constants
-    # For video formats, we render as appropriate frame format first
-    format_to_use = output_format_override.upper()
-    if format_to_use in ['EXR_264_MP4', 'EXR_AV1_MP4', 'EXR_VP9_WEBM']:
-        format_to_use = 'EXR'  # Render as EXR for EXR video formats
-    
-    format_map = {
-        'PNG': 'PNG',
-        'JPEG': 'JPEG',
-        'JPG': 'JPEG',
-        'EXR': 'OPEN_EXR',
-        'OPEN_EXR': 'OPEN_EXR',
-        'TARGA': 'TARGA',
-        'TIFF': 'TIFF',
-        'BMP': 'BMP',
-    }
-    blender_format = format_map.get(format_to_use, format_to_use)
+    print(f"Overriding output format from '{current_output_format}' to OPEN_EXR (always EXR for pipeline)")
     try:
-        scene.render.image_settings.file_format = blender_format
-        print(f"Successfully set output format to: {blender_format}")
+        scene.render.image_settings.file_format = 'OPEN_EXR'
+        # Lock output color space to linear (defense in depth; EXR is linear for encode pipeline)
+        if getattr(scene.render.image_settings, 'has_linear_colorspace', False) and hasattr(scene.render.image_settings, 'linear_colorspace_settings'):
+            try:
+                scene.render.image_settings.linear_colorspace_settings.name = 'Linear'
+            except Exception as ex:
+                print(f"Note: Could not set linear output: {ex}")
+        print("Successfully set output format to: OPEN_EXR")
     except Exception as e:
-        print(f"Warning: Could not set output format to {blender_format}: {e}")
+        print(f"Warning: Could not set output format to OPEN_EXR: {e}")
         print(f"Using blend file's format: {current_output_format}")
 else:
     print(f"Using blend file's output format: {current_output_format}")

pkg/types/types.go

@@ -93,7 +93,8 @@ type Task struct {
 	ID             int64      `json:"id"`
 	JobID          int64      `json:"job_id"`
 	RunnerID       *int64     `json:"runner_id,omitempty"`
-	Frame          int        `json:"frame"`
+	Frame          int        `json:"frame"`                   // frame start (inclusive) for render tasks
+	FrameEnd       *int       `json:"frame_end,omitempty"`    // frame end (inclusive); nil = single frame
 	TaskType       TaskType   `json:"task_type"`
 	Status         TaskStatus `json:"status"`
 	CurrentStep    string     `json:"current_step,omitempty"`
@@ -138,8 +139,6 @@ type CreateJobRequest struct {
 	UnhideObjects   *bool           `json:"unhide_objects,omitempty"`    // Optional: Enable unhide tweaks for objects/collections
 	EnableExecution *bool           `json:"enable_execution,omitempty"`  // Optional: Enable auto-execution in Blender (adds --enable-autoexec flag, defaults to false)
 	BlenderVersion  *string         `json:"blender_version,omitempty"`   // Optional: Override Blender version (e.g., "4.2" or "4.2.3")
-	PreserveHDR     *bool           `json:"preserve_hdr,omitempty"`      // Optional: Preserve HDR range for EXR encoding (uses HLG with bt709 primaries)
-	PreserveAlpha   *bool           `json:"preserve_alpha,omitempty"`   // Optional: Preserve alpha channel for EXR encoding (requires AV1 or VP9 codec)
 }
 
 // UpdateJobProgressRequest represents a request to update job progress
@@ -234,8 +233,6 @@ type BlendMetadata struct {
 	UnhideObjects     *bool             `json:"unhide_objects,omitempty"`   // Enable unhide tweaks for objects/collections
 	EnableExecution   *bool             `json:"enable_execution,omitempty"` // Enable auto-execution in Blender (adds --enable-autoexec flag, defaults to false)
 	BlenderVersion    string            `json:"blender_version,omitempty"`  // Detected or overridden Blender version (e.g., "4.2" or "4.2.3")
-	PreserveHDR       *bool             `json:"preserve_hdr,omitempty"`     // Preserve HDR range for EXR encoding (uses HLG with bt709 primaries)
-	PreserveAlpha     *bool             `json:"preserve_alpha,omitempty"`  // Preserve alpha channel for EXR encoding (requires AV1 or VP9 codec)
 }
 
 // MissingFilesInfo represents information about missing files/addons