feat: agent concurrency, conversation summaries, AI tools config, UI polish

- Agent slot limiter for concurrent tool execution
- Conversation summarization with soft-delete (MarkSummarized)
- ANSI stripping in terminal tool output
- Configurable crush-run timeout (default 600s, max 900s)
- Starship theme refactor, AI tools config grid, system update UI
- Streaming segments refactor, summarized messages block in feed
- CSS: headings, scrollbars, tool cards, summary block styles
- i18n additions (en+fr) for tools, updates, config

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

internal/agent/definitions.go

@@ -6,11 +6,18 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"sync"
 	"time"
 )
 
+var ansiRegex = regexp.MustCompile(`\x1b\[[0-9;]*[a-zA-Z]|\x1b\][^\x07]*\x07|\x1b\][^\x1b]*\x1b\\|\x1b[()][AB012]|\[\]`)
+
+func stripANSI(s string) string {
+	return ansiRegex.ReplaceAllString(s, "")
+}
+
 var (
 	sudoCache     bool
 	sudoCacheSet  bool
@@ -103,6 +110,7 @@ func NewTerminalTool() (*ToolDefinition, error) {
 			output, err := cmd.CombinedOutput()
 
 			result := string(output)
+			result = stripANSI(result)
 			if len(result) > 10000 {
 				result = result[:10000] + "\n... [truncated]"
 			}
@@ -116,7 +124,8 @@ func NewTerminalTool() (*ToolDefinition, error) {
 }
 
 type CrushRunParams struct {
-	Task string `json:"task" description:"The task description for Crush to execute"`
+	Task    string `json:"task" description:"The task description for Crush to execute"`
+	Timeout int    `json:"timeout,omitempty" description:"Maximum execution time in seconds (default 600, max 900)"`
 }
 
 func NewCrushRunTool() (*ToolDefinition, error) {
@@ -127,7 +136,14 @@ func NewCrushRunTool() (*ToolDefinition, error) {
 				return TextErrorResponse("task is required"), nil
 			}
 
-			ctx, cancel := context.WithTimeout(ctx, 300*time.Second)
+			timeout := time.Duration(p.Timeout) * time.Second
+			if timeout == 0 {
+				timeout = 600 * time.Second
+			}
+			if timeout > 900*time.Second {
+				timeout = 900 * time.Second
+			}
+			ctx, cancel := context.WithTimeout(ctx, timeout)
 			defer cancel()
 
 			cmd := exec.CommandContext(ctx, "crush", "run", p.Task)
@@ -139,7 +155,14 @@ func NewCrushRunTool() (*ToolDefinition, error) {
 			}
 
 			if err != nil {
-				return TextErrorResponse(fmt.Sprintf("Crush error: %v\n\n%s", err, result)), nil
+				errMsg := fmt.Sprintf("Crush error: %v", err)
+				if ctx.Err() == context.DeadlineExceeded {
+					errMsg = fmt.Sprintf("Crush timed out after %d seconds. Try splitting the task into smaller parts.", int(timeout.Seconds()))
+				}
+				if result != "" {
+					errMsg += "\n\n" + result
+				}
+				return TextErrorResponse(errMsg), nil
 			}
 
 			return TextResponse(result), nil