feat(functions): add qc quick-chat wrapper around aichat

Defaults to the bundled 'cli' role (concise, terminal-friendly output),
installed on first use by symlinking scripts/cli-agent.md into the aichat
config dir. Inherits all aichat flags and completions via --wraps; passing
--role/-r forwards unchanged. Only defined when aichat is installed.
--help prepends a banner and rewrites aichat's own help to qc.

Docs: fish-config.md 5.12 + index keywords.

docs/fish-config.index

@@ -150,6 +150,9 @@ devlogs=### agents-init
 claude-cli=### claude
 claude-docs=### claude-docs
 claude-pr=### claude-pr
+qc=### qc
+quick-chat=### qc
+aichat=### qc
 superpowers=### superpowers
 media=## 5.13 Media and Utilities
 dng2avif=### dng2avif

docs/fish-config.md

@@ -1247,6 +1247,23 @@ Add -i (interactive confirmation) to destructive commands:
     conventional commit, verification, push, and open a PR with a manual
     verification checklist.
 
+### qc
+
+    Synopsis:  qc [prompt...]
+    Quick-chat wrapper around the aichat LLM CLI that defaults to the "cli"
+    role - a system prompt tuned for concise, terminal-friendly output. On
+    first use it installs the bundled role by symlinking
+    scripts/cli-agent.md to $XDG_CONFIG_HOME/aichat/roles/cli.md (creating
+    the directory if needed). Inherits every aichat flag and tab completion
+    (--wraps aichat); passing --role/-r overrides the default role, so qc
+    forwards to aichat unchanged. The function is only defined when aichat
+    is installed. Run qc --help for aichat's full flag reference with the
+    command name rewritten to qc.
+
+    qc "how do I list open ports on linux?"
+    qc -m ollama:llama3 "explain this error"
+    qc --role coder "refactor this function"
+
 ### superpowers
 
     Synopsis:  superpowers [on|off] [-g]