fix(config): stringify cache-files-maxsize like PHP's (string) cast

Config::get() resolves cache-files-maxsize by matching the stored value
against a size regex. The port read that value with as_string(), which
yields None for anything that is not a string, where PHP casts with
(string).

create-project feeds Config::all() back through Config::merge(), so the
second read finds the byte count the first read produced rather than the
original "300MiB". as_string() then yields an empty string, the regex
fails, and the resulting RuntimeException is swallowed by Config::get(),
which maps Err to null. FileDownloader turns that null into a zero max
size via .as_int().unwrap_or(0), and Cache::gc() deletes every file in
the download cache because the total always exceeds zero.

Apply the same cast on the path branch, the other site where Config.php
writes (string).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

1 files changed, 2 insertions, 7 deletions

diff --git a/crates/shirabe/src/config.rs b/crates/shirabe/src/config.rs
index 5d990c55..04599aa4 100644
--- a/crates/shirabe/src/config.rs
+++ b/crates/shirabe/src/config.rs
@@ -590,7 +590,7 @@ impl Config {
                     val
                 };
                 let processed = self.process(raw_val, flags)?;
-                let mut val_str = rtrim(processed.as_string().unwrap_or(""), Some("/\\"));
+                let mut val_str = rtrim(&php_to_string(&processed), Some("/\\"));
                 val_str = Platform::expand_path(&val_str);
 
                 if substr(key, -4, None) != "-dir" {
@@ -646,12 +646,7 @@ impl Config {
 
             // numbers with kb/mb/gb support, without env var support
             "cache-files-maxsize" => {
-                let raw = self
-                    .config
-                    .get(key)
-                    .and_then(|v| v.as_string())
-                    .unwrap_or("")
-                    .to_string();
+                let raw = self.config.get(key).map(php_to_string).unwrap_or_default();
                 let mut matches: IndexMap<CaptureKey, String> = IndexMap::new();
                 if !Preg::is_match3(
                     php_regex!(r"/^\s*([0-9.]+)\s*(?:([kmg])(?:i?b)?)?\s*$/i"),