Standardize issue status labels to done/open/in progress

Rename resolved→done (#1-4, #11), closed→done (#13, #18),
open (post-core)→open (#7), mark #9 as superseded by #21.

issues/01-syntax-design.md

@@ -1,6 +1,6 @@
 # 01 — Design and finalize syntax for all new features
 
-**Status:** resolved
+**Status:** done
 **Blocks:** #02, #04, #05
 
 ## Backtick command execution

issues/02-backtick-lexing-parsing.md

@@ -1,6 +1,6 @@
 # 02 — Complete backtick command lexing and parsing
 
-**Status:** resolved
+**Status:** done
 **Blocked by:** #01
 **Blocks:** #03
 

issues/03-command-execution-runtime.md

@@ -1,6 +1,6 @@
 # 03 — Implement direct command execution runtime (no shell)
 
-**Status:** resolved
+**Status:** done
 **Blocked by:** #02
 **Blocks:** #06, #07
 

issues/04-argv-parsing.md

@@ -1,6 +1,6 @@
 # 04 — Implement argv parsing (tokenize command strings)
 
-**Status:** resolved
+**Status:** done
 **Blocked by:** #01
 **Blocks:** #06
 

issues/07-redirection.md

@@ -1,6 +1,6 @@
 # 07 — Implement I/O redirection for commands
 
-**Status:** open (post-core)
+**Status:** open
 **Blocked by:** #03
 
 ## Syntax

issues/09-prompt.md

@@ -1,6 +1,6 @@
 # 09 — Programmable prompt
 
-**Status:** open
+**Status:** done (superseded by #21)
 **Blocked by:** #08
 
 Users should be able to customize the shell prompt by defining a Lua function, similar to how other shells use `PS1`/`PROMPT_COMMAND`/`precmd`.

issues/11-ctrl-c-repl-behaviour.md

@@ -1,6 +1,6 @@
 # Issue #11 — Ctrl-C REPL behaviour
 
-**Status:** resolved
+**Status:** done
 
 ## Problem
 

issues/13-shell-globbing.md

@@ -1,6 +1,6 @@
 # Issue #13 — Shell globbing
 
-**Status:** closed
+**Status:** done
 **Blocked by:** #03, #04
 
 ## Problem

issues/18-tilde-expansion.md

@@ -1,6 +1,6 @@
 # 18 — Path expansion (`~`, `*`, `**`)
 
-**Status:** closed
+**Status:** done
 **Related:** #13 shell globbing
 
 Path expansion for `~` is not available. Commands like: