chore: post-audit consistency fixes

Two micro-fixes from a post-audit code review:

1. src/main.ts — route addExcludedHeading and addExcludedPhrase catch
   blocks through this.log(..., errorMessage(error)) to match the
   pattern every other catch in the file already uses. Pre-fix the
   diagnostic printed via console.error unconditionally; post-fix it
   prints only when the user has debug logging enabled. The user-
   facing Notice is unchanged either way.

2. .gitignore — drop *.html and *.zip rules. The *.html rule was
   redundant with the docs/ui-mockups/ directory rule that already
   catches every HTML file currently in the tree, and the *.zip rule
   was a Phase-0-era defense-in-depth concern the CI release pipeline
   made obsolete. Removing both means future intentional HTML or zip
   files won't be silently swallowed.

CHANGELOG [Unreleased] entry covers both. All 134 vitest tests still
pass; lint and build clean.

.gitignore

@@ -48,8 +48,6 @@ CLAUDE.md
 
 # UI mockups and temporary files
 docs/ui-mockups/
-*.html
-*.zip
 
 # Obsidian developer documentation (external reference)
 obsidian-developer-docs/

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## [Unreleased]
 
+### Internal
+- **Consistency fixes flagged in post-audit review**
+  - `addExcludedHeading` and `addExcludedPhrase` in `src/main.ts` routed their catch blocks through `console.error(...)`, while every other catch in the file uses `this.log(..., errorMessage(error))`. Updated the two outliers to match. Behavior change: the diagnostic message is now visible only when the user has debug logging enabled (the user-facing `Notice('Failed to add ...')` is unchanged). Pre-fix the message printed unconditionally; post-fix it's debug-gated like every other error path in the file.
+  - Removed `*.html` and `*.zip` rules from `.gitignore`. The `*.html` rule was redundant with the `docs/ui-mockups/` directory rule that already catches every HTML file in the working tree; the `*.zip` rule was a Phase-0-era defense-in-depth concern that the CI release pipeline made obsolete (the pipeline produces no zips). Removing both means future intentional HTML or zip files won't be silently swallowed.
+
 ## [1.7.1] - 2026-05-13
 
 ### Internal

src/main.ts

@@ -751,7 +751,7 @@ export default class CustomSelectedWordCountPlugin extends Plugin {
 			(this.app as AppWithInternals).setting.openTabById(this.manifest.id);
 
 		} catch (error) {
-			console.error('Error adding excluded heading:', error);
+			this.log('Error adding excluded heading:', errorMessage(error));
 			new Notice('Failed to add heading to exclusion list');
 		}
 	}
@@ -787,7 +787,7 @@ export default class CustomSelectedWordCountPlugin extends Plugin {
 			(this.app as AppWithInternals).setting.openTabById(this.manifest.id);
 
 		} catch (error) {
-			console.error('Error adding excluded phrase:', error);
+			this.log('Error adding excluded phrase:', errorMessage(error));
 			new Notice('Failed to add phrase to exclusion list');
 		}
 	}