Fix CLI help text consistency and case-insensitive tool routing

Make tool shortcut routing in resolveCompatibleArgs case-insensitive so
`quarto install TinyTeX` and similar mixed-case variants work. Align
install/uninstall/update descriptions to all list available tools
dynamically. Add debug logging in findCftExecutable fallback path.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: cderv

src/command/install/cmd.ts

@@ -36,7 +36,7 @@ export const installCommand = new Command()
     "Update system path when a tool is installed",
   )
   .description(
-    `Installs a global dependency (${installableToolNames().join(", ")}).`,
+    `Installs an extension or global dependency (${installableToolNames().join(", ")}).`,
   )
   .example(
     "Install TinyTeX",

src/command/remove/cmd.ts

@@ -173,7 +173,7 @@ export const resolveCompatibleArgs = (
       return {
         action: "extension",
       };
-    } else if (installableTools().includes(extname)) {
+    } else if (installableTools().includes(extname.toLowerCase())) {
       return {
         action: "tool",
         name: args[0],

src/command/update/cmd.ts

@@ -14,6 +14,7 @@ import {
   selectTool,
   updateOrInstallTool,
 } from "../../tools/tools-console.ts";
+import { installableToolNames } from "../../tools/tools.ts";
 import { resolveCompatibleArgs } from "../remove/cmd.ts";
 
 export const updateCommand = new Command()
@@ -28,7 +29,7 @@ export const updateCommand = new Command()
     "Embed this extension within another extension (used when authoring extensions).",
   )
   .description(
-    "Updates an extension or global dependency.",
+    `Updates an extension or global dependency (${installableToolNames().join(", ")}).`,
   )
   .example(
     "Update extension (Github)",

src/tools/impl/chrome-for-testing.ts

@@ -140,8 +140,8 @@ export function findCftExecutable(
     if (existsSync(knownPath)) {
       return knownPath;
     }
-  } catch {
-    // Platform detection failed — fall through to walk
+  } catch (e) {
+    debug(`findCftExecutable: platform detection failed, falling back to walk: ${e}`);
   }
 
   // Fallback: bounded walk for unexpected directory structures