fix(newos4): predictor arithmetic, deployed-source viewer, ls text output (v4.6.57)

Acting on the "Request to the newOS4 team" packet (spaces/agando/guides/,
re-verified by its author on 4.6.56). Three verified defects fixed:

Packet 5 (predictor arithmetic) - module-predictor.js
- the persisted field named mape held a SUM while predictor-status divided by the
  paired count: renamed to errorSum, older payloads read through
- errorPct is stored raw; the 500% clamp is now render-only, so a 475x miss stays
  visible instead of being flattened to the ceiling
- predictions are floored at 1 s and marked floored; a floored prediction is
  consumed but never scored as 100% error (a 0 s prediction is not a prediction)
- observations shorter than 1.5 s (aborted/instant runs) are marked unusable and
  no longer train _findSimilar - one 0.079 s run was rounding the next prediction
  to 0 s
- status prints an unpaired and an unscored count alongside the mean

Packet 10 (verification cannot see its own fixes) - module-aiassist.js
- view_module now returns the DEPLOYED source, prefixed with file and version,
  and only falls back to the _mods copy with a "may be stale" banner. The
  unversioned _mods/<Class>.js edit cache used to shadow the deployed file
  forever, so the viewer showed pre-fix code while the bundle was new.
  Proven by seeding a stale _mods/PredictorModule.js and calling the tool.

Packet 1b (ls exits clean with no output) - module-fs.js
- ls rendered only via printClickable(), which writes straight to the DOM, so any
  capture (AI run_command, diagnostics) saw an empty result and reported "empty
  directory". It now always prints a text line and keeps the clickable chips when
  nothing is capturing.

Test: modules/test/test-predictor-accuracy.js 34/34 (new cases Q, R, S).

1 files changed, 10 insertions, 4 deletions

diff --git a/modules/core/module-aiassist.js b/modules/core/module-aiassist.js
index 83d073a..628e68a 100644
--- a/modules/core/module-aiassist.js
+++ b/modules/core/module-aiassist.js
@@ -3094,9 +3094,11 @@ buildSystemPrompt() {
                     case 'view_module': {
                         const modName = a.name || '';
                         const entry = this.terminal.moduleManager.moduleRegistry.find(m => m.name === modName);
-                        const code = this.terminal.fs.readFile(`_mods/${modName}.js`);
-                        if (code) return code;
                         const url = entry ? entry.url : null;
+                        // v4.6.57: deployed source FIRST. The unversioned `_mods/<Name>.js` edit cache
+                        // used to shadow it forever, so view_module returned pre-fix code while the
+                        // running bundle was new (packet §10). The cache is only a labelled fallback.
+                        const deployedVer = (typeof localStorage !== 'undefined' && localStorage.getItem('webx11_cache_ver')) || 'dev';
                         // Try registry URL first
                         if (url) {
                             try {
@@ -3104,7 +3106,7 @@ buildSystemPrompt() {
                                 if (resp.ok) {
                                     const src = await resp.text();
                                     this.terminal.fs.writeFile(`_mods/${modName}.orig.js`, src);
-                                    return src;
+                                    return '// deployed: ' + url + ' @ ' + deployedVer + '\n' + src;
                                 }
                             } catch (e) { /* fall through */ }
                         }
@@ -3126,11 +3128,15 @@ buildSystemPrompt() {
                                     if (resp.ok) {
                                         const src = await resp.text();
                                         this.terminal.fs.writeFile(`_mods/${modName}.orig.js`, src);
-                                        return src;
+                                        return '// deployed: ' + fetchUrl + ' @ ' + deployedVer + '\n' + src;
                                     }
                                 }
                             }
                         } catch (e) { /* fall through */ }
+                        const cachedSrc = this.terminal.fs.readFile(`_mods/${modName}.js`);
+                        if (cachedSrc) {
+                            return '// VFS COPY of ' + modName + '.js — may be stale (not the deployed file)\n' + cachedSrc;
+                        }
                         return JSON.stringify({ error: `Cannot find source for ${modName} — not in registry, not in modules-index.json` });
                     }
                     case 'edit_module': {