feat: add startup provider chooser

README.md

@@ -32,14 +32,16 @@ cargo run --locked -- "rust programming"
 ## Usage
 
 ```sh
-tubular                       # Start without a query
-tubular "rust programming"    # Search immediately
-tubular --miruro "apothecary"  # Search Miruro instead
+tubular                       # Choose YouTube or Miruro
+tubular "rust programming"    # Choose a provider, then search this query
+tubular --miruro "apothecary"  # Skip the chooser and search Miruro directly
 tubular --player /path/to/terebi "japanese podcast"
 tubular --help
 ```
 
-Tubular starts in **normal mode**, with or without a command-line query. Press `i` to type a search; Enter submits a changed query and returns to normal mode. Esc returns without submitting.
+Startup shows a centered **YouTube / Miruro** selector. Use `j` / `k` or arrows to select and Enter to open that provider's existing browser; Esc, `q`, or Ctrl-C quits without opening a browser. Navigation, confirmation and Esc use the configured `selector.select.next`, `selector.select.previous`, `selector.open` and `selector.close` bindings; quit/interrupt bindings also apply. An initial CLI query searches whichever provider you select. `--miruro` bypasses the chooser; `--help` and `--default-config` remain noninteractive.
+
+After selection, the browser starts in **normal mode**. Press `i` to type a search; Enter submits a changed query and returns to normal mode. Esc returns without submitting.
 
 Selecting a video launches:
 
@@ -52,7 +54,7 @@ Each selection opens an independent player instance without replacing existing p
 
 ### Miruro episodes
 
-Use `--miruro` at startup, or reach the permanent **Miruro** tab with Tab / Shift-Tab. Press `i` to edit its search and Enter to submit. Autocomplete returns at most eight catalog titles, without pagination. Enter on a title loads its returned episodes; Enter on an episode resolves a fresh direct **ssub / sun** HLS source and launches Terebi with a private source document. `/` still opens YouTube Search.
+Choose **Miruro** at startup, use `--miruro` to start directly, or reach the permanent **Miruro** tab with Tab / Shift-Tab. Press `i` to edit its search and Enter to submit. Autocomplete returns at most eight catalog titles, without pagination. Enter on a title loads its returned episodes; Enter on an episode resolves a fresh direct **ssub / sun** HLS source and launches Terebi with a private source document. `/` still opens YouTube Search.
 
 Episodes support watch later, saved videos, currently watching, and watched status. Only episodes—not catalog titles—can be saved. Reopening a saved episode resolves new URLs; identity is the opaque Miruro catalog ID plus its returned episode number. Miruro entries appear in combined collections, not YouTube channel categories. Channel/tag actions and YouTube thumbnails/extraction do not apply.
 

docs/miruro-api.md

@@ -431,7 +431,7 @@ Wrapper-extraction verification, before TUI integration: `cargo test --locked` p
 
 ## Tubular → Terebi integration
 
-`tubular --miruro "apothecary"` starts the permanent Miruro search tab. Catalog Enter opens actual returned episodes; episode Enter resolves fresh sources off-thread. Autocomplete is limited to eight titles, without invented pagination. One worker handles bounded network work; changing views/queries invalidates stale responses rather than launching obsolete selections. Canonical title/slug rules follow the [deployed helper][link-helpers], including Unicode NFD normalization.
+`tubular` offers a centered YouTube/Miruro startup selector; an initial query follows the chosen provider. `tubular --miruro "apothecary"` bypasses it and starts the permanent Miruro search tab directly. Catalog Enter opens actual returned episodes; episode Enter resolves fresh sources off-thread. Autocomplete is limited to eight titles, without invented pagination. One worker handles bounded network work; changing views/queries invalidates stale responses rather than launching obsolete selections. Canonical title/slug rules follow the [deployed helper][link-helpers], including Unicode NFD normalization.
 
 Titles normalizing to an empty slug fail explicitly; the wrapper does not guess an alternative detail route. This does not reject accented Latin titles, which use NFD decomposition.
 
@@ -486,6 +486,8 @@ After Tubular exited successfully, its independent GUI continued appending match
 
 Final integrated checks passed: `cargo fmt --check`, all **175 tests**, `cargo clippy --locked --all-targets -- -D warnings`, `cargo build --locked`, and the built executable's `--help`. Regressions cover v1 compatibility, v2 identity/95%/null-duration boundaries, restart/partial-report recovery, source/session permissions and retention, collection routing, stale responses and canonical Unicode slugging. The installed Terebi CLI was older and lacked `--source-file`; the explicit developer-bundle override avoided changing that installation.
 
+Startup provider-selection verification: **176 tests**, formatting, Clippy and build passed. Actual terminal runs showed the centered selector, routed both provider choices into their existing interfaces, carried an initial query into Miruro autocomplete, honored remapped selector keys, canceled on an encoded terminal Escape event, and preserved direct `--miruro` startup and noninteractive help/default-config. Bare Escape-byte injection in the automated terminal remained ambiguous; the complete terminal key encoding was exercised instead.
+
 This run proves Tubular-to-Terebi launch, acknowledged playback/progress consumption and independent lifetime—not visible subtitle rendering, perceived A/V synchronization, or seeks through the user's installed release. English subtitle appearance/synchronization before and after seeking still requires a visible-app check.
 
 ## Remaining research questions