Encode non-ASCII directory paths in HTTP headers

Improvements

• CoreAdd truncation for all tools
• CoreMake General SubAgent visible in agent list@dbpolito
• CoreImprove handling of unserializable errors
• CoreAdded ability to hide subagents from primary agent's system prompt@Sewer56
• CoreAdd --use-system-ca flag in execArgv to support system certificate authorities
• CoreEnsure commands listing subagent work
• TerminalAdd theme functionality
• TerminalReload theme when configuration changes
• TerminalClear palette cache
• TerminalAdd agent color to inline task tool ASCII character and highlight agent name@spoons-and-mirrors
• TerminalEscape backticks when passing commands to PowerShell@NSPC911
• TerminalRestore attach session lookup behavior in TUI@rmk40
• DesktopFix pasting images when input is empty in desktop app@dbpolito
• DesktopBundle media framework in desktop application@Brendonovich
• DesktopFixed macOS application entitlements configuration@Brendonovich
• DesktopAdd audio input and camera permissions to entitlements@saeedvaziry
• DesktopBundle media framework in AppImage for desktop application@Brendonovich
• DesktopUse Show instead of Suspense in desktop application@Brendonovich
• DesktopAdd UI package to desktop application@Brendonovich
• DesktopShow window immediately during desktop startup@usvimal
• DesktopRework storage approach in app
• DesktopFix session navigation with keyboard shortcuts
• DesktopPermission auto-accept should hide when not needed
• DesktopImprove terminal text selection visibility with better color contrast