[bhushan4work]

normalize extracted page titles by decoding html entities, collapsing consecutive ascii whitespace into a single space, and trimming both ends. this prevents titles with multiline indentation or internal tabs from being stored with irregular spacing. non-ascii whitespace and meta content values are left untouched.

closes #393

how i tested this

• added a regression test in meta-fetcher.test.ts that fails before the fix and passes after.
• ran npm run check (0 errors, 0 warnings).
• ran npm run test (107 test files, 2054 tests passed).
• ran npm run build (clean server and static asset build).
• rebased onto latest origin/dev with zero merge conflicts and a clean working tree.
• pushed to origin/393 and verified remote commit sha bc04400.

ai assistance

none

type of change

• bug fix
• new template
• new feature
• documentation
• tests
• refactoring
• performance improvement
• other (describe below)

screenshots

not applicable (no visual changes)

checklist

• this pr targets dev
• i was assigned the linked issue
• npm run check passes
• npm run test passes
• for a bug fix: the new test fails without my change
• tested locally with npm run dev
• screenshots included for visual changes
• new templates follow the template guidelines