fix: restore search, directions, and settings interactions

[DeBaschdi]

Summary

• restore Vue 3 component bindings used by search, directions, settings, favorites, and navigation
• prevent invalid My Maps IDs and the accidental /m/noIcon request
• allow PageController construction without a user ID while keeping authenticated actions guarded

Validation

• production Webpack build
• Psalm static analysis
• targeted ESLint and PHP syntax checks
• PHPUnit: 4 tests, 8 assertions
• LF and git diff --check verification

AI (if applicable)

• The content of this PR was partly or fully generated using AI

Fixes #1596
Fixes #1614

[jancborchardt]

Very very cool!!

Did some smoke testing and some minor interface issues came up. Let me know if that's at all related here or separate. :) Mostly missing icons:

Missing icons in nav, menus and "Clear POIs" button

Missing icons for further overlay switcher and location toggle

Missing icons for favorite sidebar

Missing icon on favorite marker on map

It's there in the left nav though.

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A local review with Claude Opus 4.8 pointed out these things:

1. Incomplete migration — src/components/map/PlaceContactPopup.vue:22 still uses old inputLabel="FN" on an NcSelect. Functionally works (uses v-model), but inputLabel is now dead → contact multiselect loses accessible label. Same bug class as this PR; worth folding in. (Also same file line 23 in the "add contact address" flow.)
2. Behavior change — SearchField.onOptionSelected now sets this.mySelectedOption = option unconditionally, including for type === 'query' options (before: only on the non-query branch). After firing an OSM text search the field's selected-option now shows the raw query string.

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The content of this PR was partly or fully generated using AI

Note that it would be good to add this info to the commits as per the contribution guidelines. Just a simple line with the proper trailer which lists the tool and model+version is enough :)
https://github.com/nextcloud/.github/blob/master/CONTRIBUTING.md#ai-assisted-contributions

[jancborchardt]

Oh and while we're at it, you could also set the max-version to 36 or so? :)

[DeBaschdi]

I'll take another look to see what might be wrong with the icons.